50-32-8 structure, C20H12

Benzo[a]pyrene

CAS No.

50-32-8

Formula:

C20H12

Basic Info

Benzo[a]pyrene is a polycyclic aromatic hydrocarbon found in coal tar with the formula C20H12. Its metabolites are mutagenic and highly carcinogenic, and it is listed as a Group 1 carcinogen by the IARC. The compound is one of the benzopyrenes, formed by a benzene ring fused to pyrene, and is the result of incomplete combustion at temperatures between 300°C (572°F) and 600°C (1,112°F).
In the 18th century, young British chimney sweeps who climbed into chimneys suffered from chimney sweeps' carcinoma, a scrotal cancer peculiar to their profession, and this was connected to the effects of soot in 1775, in the first work of occupational cancer epidemiology and also the first connection of any chemical mixture to cancer formation. Frequent skin cancers were noted among fuel industry workers in the 19th century. In 1933, benzo[a]pyrene was determined to be the compound responsible for these cases, and its carcinogenicity was demonstrated when skin tumors occurred in laboratory animals repeatedly painted with coal tar. Benzo[a]pyrene has since been identified as a prime carcinogen in cigarette smoke. When the body attempts to metabolise benzo[a]pyrene, the resulting diol epoxide reacts and binds to DNA, resulting in mutations and eventually cancer.

Formula
C20H12
Molecular Weight
252.309
Exact Mass
252.094
LogP
5.7372
PSA
0
Synonyms

3,4-benzopyrene

Benzo(a)pyrene

Benzo[pqr]tetraphene

Benzopyrene

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Properties

Appearance & Physical State
yellow to brown powder.
Density
1.286 g/cm3
Boiling Point
495ºC
Melting Point
175-179ºC
Flash Point
228.6ºC
Stability
Stable. Incompatible with strong oxidizing agents.
Storage Condition
APPROX 4ºC

Safety Info

RTECS
DJ3675000
Safety Statements
S53-S45-S61-S62
Risk Statements
R45; R11; R38; R50/53; R65; R67
HS Code
2902909090
RIDADR
UN 1145
Hazard Class
6.1
Packing Group
III
Hazard Codes

MSDS

SDS 1.0
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SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 11, 2017

Revision Date: Aug 11, 2017

1.Identification

1.1 GHS Product identifier

Product name benzo[a]pyrene

1.2 Other means of identification

Product number -
Other names benzo(a)pyrene

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only. Food Contaminant: CONTAMINANT
Uses advised against no data available

1.4 Supplier's details

Company MOLBASE (Shanghai) Biotechnology Co., Ltd.
Address Floor 4 & 5, Building 12, No. 1001 North Qinzhou Road,
Xuhui District, Shanghai, China
Telephone +86(21)64956998
Fax +86(21)54365166

1.5 Emergency phone number

Emergency phone number +86-400-6021-666
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

2.Hazard identification

2.1 Classification of the substance or mixture

Skin sensitization, Category 1

Germ cell mutagenicity, Category 1B

Carcinogenicity, Category 1B

Hazardous to the aquatic environment, short-term (Acute) - Category Acute 1

Hazardous to the aquatic environment, long-term (Chronic) - Category Chronic 1

Reproductive toxicity, Category 1B

2.2 GHS label elements, including precautionary statements

Pictogram(s)
Signal word

Danger

Hazard statement(s)

H317 May cause an allergic skin reaction

H340 May cause genetic defects

H350 May cause cancer

H410 Very toxic to aquatic life with long lasting effects

H360FD

Precautionary statement(s)
Prevention

P261 Avoid breathing dust/fume/gas/mist/vapours/spray.

P272 Contaminated work clothing should not be allowed out of the workplace.

P280 Wear protective gloves/protective clothing/eye protection/face protection.

P201 Obtain special instructions before use.

P202 Do not handle until all safety precautions have been read and understood.

P273 Avoid release to the environment.

Response

P302+P352 IF ON SKIN: Wash with plenty of water/...

P333+P313 If skin irritation or rash occurs: Get medical advice/attention.

P321 Specific treatment (see ... on this label).

P362+P364 Take off contaminated clothing and wash it before reuse.

P308+P313 IF exposed or concerned: Get medical advice/ attention.

P391 Collect spillage.

Storage

P405 Store locked up.

Disposal

P501 Dispose of contents/container to ...

2.3 Other hazards which do not result in classification

none

3.Composition/information on ingredients

3.1 Substances

Chemical name Common names and synonyms CAS number EC number Concentration
benzo[a]pyrene benzo[a]pyrene 50-32-8 none 100%

4.First-aid measures

4.1 Description of necessary first-aid measures

General advice

Consult a physician. Show this safety data sheet to the doctor in attendance.

If inhaled

Fresh air, rest.

In case of skin contact

Remove contaminated clothes. Rinse and then wash skin with water and soap.

In case of eye contact

Rinse with plenty of water (remove contact lenses if easily possible).

If swallowed

Rinse mouth.

4.2 Most important symptoms/effects, acute and delayed

SYMPTOMS: Symptoms of exposure to this compound include mucous membrane irritation, dermatitis, bronchitis, cough, dyspnea, conjunctivitis, photosensitization, pulmonary edema, reproductive effects and leukemia. Contact with the skin may result in erythema, pigmentation, desquamation, formation of verrucae and infiltration. It may also cause keratoses which are relatively small, heaped-up, scaling, brown plaques on the skin, some of which may be fissured and may itch. Exposure to this type of compound may cause reddening and squamous eczema of the lid margins with only small erosion of the corneal epithelium and superficial changes in the stroma which disappear a month following exposure. Repeated exposure may cause sunlight to have a more severe effects on a person's skin and also an allergic skin rash. Aplastic anemia may also occur. Chronic exposure to the fumes and dust of this type of compound can cause discoloration of the cornea and epithelioma of the lid margin. ACUTE/CHRONIC HAZARDS: This compound may be harmful by ingestion or inhalation. It may cause irritation. When heated to decomposition it emits acrid smoke and toxic fumes of carbon monoxide and carbon dioxide.

4.3 Indication of immediate medical attention and special treatment needed, if necessary

Immediate first aid: Ensure that adequate decontamination has been carried out. If patient is not breathing, start artificial respiration, preferably with a demand-valve resuscitator, bag-valve-mask device, or pocket mask, as trained. Perform CPR as necessary. Immediately flush contaminated eyes with gently flowing water. Do not induce vomiting. If vomiting occurs, lean patient forward or place on left side (head-down position, if possible) to maintain an open airway and prevent aspiration. Keep patient quiet and maintain normal body temperature. Obtain medical attention. /Aromatic hydrocarbons and related compounds/

5.Fire-fighting measures

5.1 Extinguishing media

Suitable extinguishing media

Flammable, but generally found in such low quantities it is not considered a fire hazard ... Poisonous gases are produced in fire including carbon monoxide. If material or contaminated runoff enters waterways, notify downstream users of potentially contaminated waters. Notify local health and fire officials and pollution control agencies. From a secure, explosion-proof location, use water spray to cool exposed containers. If cooling streams are ineffective (venting sound increases in volume and pitch, tank discolors or shows any signs of deforming), withdraw immediately to a secure position.

5.2 Specific hazards arising from the chemical

Literature sources indicate that this chemical is nonflammable.

5.3 Special protective actions for fire-fighters

Wear self-contained breathing apparatus for firefighting if necessary.

6.Accidental release measures

6.1 Personal precautions, protective equipment and emergency procedures

Use personal protective equipment. Avoid dust formation. Avoid breathing vapours, mist or gas. Ensure adequate ventilation. Evacuate personnel to safe areas. Avoid breathing dust. For personal protection see section 8.

6.2 Environmental precautions

Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Do NOT wash away into sewer. Sweep spilled substance into covered sealable containers. If appropriate, moisten first to prevent dusting. Carefully collect remainder. Then store and dispose of according to local regulations.

6.3 Methods and materials for containment and cleaning up

SRP: Wastewater from contaminant suppression, cleaning of protective clothing/equipment, or contaminated sites should be contained and evaluated for subject chemical or decomposition product concentrations. Concentrations shall be lower than applicable environmental discharge or disposal criteria. Alternatively, pretreatment and/or discharge to a permitted wastewater treatment facility is acceptable only after review by the governing authority and assurance that "pass through" violations will not occur. Due consideration shall be given to remediation worker exposure (inhalation, dermal and ingestion) as well as fate during treatment, transfer and disposal. If it is not practicable to manage the chemical in this fashion, it must be evaluated in accordance with EPA 40 CFR Part 261, specifically Subpart B, in order to determine the appropriate local, state and federal requirements for disposal.

7.Handling and storage

7.1 Precautions for safe handling

Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Avoid exposure - obtain special instructions before use.Provide appropriate exhaust ventilation at places where dust is formed. For precautions see section 2.2.

7.2 Conditions for safe storage, including any incompatibilities

Provision to contain effluent from fire extinguishing. Separated from strong oxidants. Store in an area without drain or sewer access. Cool. Dry.Store in tightly closed containers in a cool, well-ventilated area away from oxidizing chemicals (such as chlorates, perchlorates, permanganates, and nitrates). A regulated, marked area should be established where this chemical is handled, used, or stored in compliance with OSHA standard 1910.1045.

8.Exposure controls/personal protection

8.1 Control parameters

Occupational Exposure limit values

Recommended Exposure Limit: 10 Hr Time-Weighted Avg: 0.1 mg/cu m (cyclohexane-extractable fraction). /Coal tar pitch volatiles/

NIOSH considers coal tar pitch volatiles to be potential occupational carcinogens. /Coal tar pitch volatiles/

Biological limit values

no data available

8.2 Appropriate engineering controls

Handle in accordance with good industrial hygiene and safety practice. Wash hands before breaks and at the end of workday.

8.3 Individual protection measures, such as personal protective equipment (PPE)

Eye/face protection

Safety glasses with side-shields conforming to EN166. Use equipment for eye protection tested and approved under appropriate government standards such as NIOSH (US) or EN 166(EU).

Skin protection

Wear impervious clothing. The type of protective equipment must be selected according to the concentration and amount of the dangerous substance at the specific workplace. Handle with gloves. Gloves must be inspected prior to use. Use proper glove removal technique(without touching glove's outer surface) to avoid skin contact with this product. Dispose of contaminated gloves after use in accordance with applicable laws and good laboratory practices. Wash and dry hands. The selected protective gloves have to satisfy the specifications of EU Directive 89/686/EEC and the standard EN 374 derived from it.

Respiratory protection

Wear dust mask when handling large quantities.

Thermal hazards

no data available

9.Physical and chemical properties

Physical state yellow to brown powder.
Colour PALE YELLOW MONOCLINIC NEEDLES FROM BENZENE & METHANOL
Odour Faint aromatic odor
Melting point/ freezing point 207°C(lit.)
Boiling point or initial boiling point and boiling range 496°C(lit.)
Flammability Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.
Lower and upper explosion limit / flammability limit no data available
Flash point 73°C(lit.)
Auto-ignition temperature no data available
Decomposition temperature no data available
pH no data available
Kinematic viscosity no data available
Solubility less than 1 mg/mL at 17.22°C
Partition coefficient n-octanol/water (log value) log Kow = 6.13
Vapour pressure 5.49e-09 mm Hg at 25°C
Density and/or relative density 1.286 g/cm3
Relative vapour density 8.7 (Relative to Air)
Particle characteristics no data available

10.Stability and reactivity

10.1 Reactivity

no data available

10.2 Chemical stability

Undergoes photo-oxidation after irradiation in indoor sunlight or by fluorescent light in organic solvents.

10.3 Possibility of hazardous reactions

Combustible.BENZO[A]PYRENE undergoes photo-oxidation after irradiation in indoor sunlight or by fluorescent light in organic solvents. Incompatible with strong oxidizing agents including various electrophiles, peroxides, nitrogen oxides and sulfur oxides. Oxidized by ozone, chromic acid and chlorinating agents. Readily undergoes nitration and halogenation. Hydrogenation occurs with platinum oxide .

10.4 Conditions to avoid

no data available

10.5 Incompatible materials

Incompatibilities: strong oxidizers, nitrogen dioxide, and ozone.

10.6 Hazardous decomposition products

When heated to decomposition it emits acrid smoke and fumes.

11.Toxicological information

Acute toxicity

  • Oral: no data available
  • Inhalation: no data available
  • Dermal: no data available

Skin corrosion/irritation

no data available

Serious eye damage/irritation

no data available

Respiratory or skin sensitization

no data available

Germ cell mutagenicity

no data available

Carcinogenicity

CLASSIFICATION: B2; probable human carcinogen. BASIS FOR CLASSIFICATION: Human data specifically linking benzo(a)pyrene (BAP) to a carcinogenic effect are lacking. There are, however, multiple animal studies in many species demonstrating BAP to be carcinogenic following administration by numerous routes. BAP has produced positive results in numerous genotoxicity assays. NOTE: At the June, 1992 CRAVE Work Group meeting, a revised risk estimate for benzo(a)pyrene was verified. ... The Carcinogenicity Background Document provides details on the rationale and methods used to derive the carcinogenicity values found in IRIS. ... HUMAN CARCINOGENICITY DATA: Inadequate. ANIMAL CARCINOGENICITY DATA: Sufficient. /Based on former classification system/

Reproductive toxicity

no data available

STOT-single exposure

no data available

STOT-repeated exposure

no data available

Aspiration hazard

no data available

12.Ecological information

12.1 Toxicity

  • Toxicity to fish: LT50 (time to 50% mortality); Species: Pimephales promelas (Fathead minnow, larvae 7 days posthatch); Conditions: freshwater, renewal; Concentration: 5.6 ug/L for 40.05 hr
  • Toxicity to daphnia and other aquatic invertebrates: EC50; Species: Daphnia magna (Water flea, about 4 days old juvenile); Conditions: freshwater, static, 20°C, pH 8.0, alkalinity 250 mg/L CaCO3; Concentration: 40 ug/L for 24 hr (95% confidence interval: 32-49 ug/L); Effect: intoxication, immobilization
  • Toxicity to algae: EC50; Species: Pseudokirchneriella subcapitata (Green algae, 500000 cells/mL); Conditions: freshwater, static, 23°C; Concentration: 15 ug/L for 72 hr; Effect: growth, general /97% purity
  • Toxicity to microorganisms: no data available

12.2 Persistence and degradability

AEROBIC: (14)C-benzo(a)pyrene was not significantly mineralized in sludge treated Caledon soil; half-lives ranged from 23 to 266 weeks(1). The persistence of benzo(a)pyrene in soil is expected to vary depending upon the nature of compounds accompanying it and the nature and previous history of the soil(1). After 5 days incubation in activated sludge, <0.1% of the applied (14)C-benzo(a)pyrene concn was degraded to (14)-CO2(2). Incubation of (14)C-benzo(a)pyrene in creosote-pentachlorophenol contaminated soil over 285 days led to a small, <1%, mineralization of benzo(a)pyrene(3). Calculated half-lives for the mineralization of (14)C-benzo(a)pyrene in sediment/water microcosms ranged from >200 weeks in Redfish Bay, TX to >300 weeks in Lake Chicot, AR; no mineralization was detected in microcosms containing sediment and water from DeGray Reservoir, AR(4). The extent of mineralization of (14)C-benzo(a)pyrene, at a concentration of 105 ng/g, in soils collected from an abandoned coal tar refinery was very low, <8%, after 160 days(5). The level of indigenous mineralization of (14)C-benzo(a)pyrene in soils obtained from three abandoned coal gasification plants as measured by serum bottle respirometry ranged from not detectable to 25% following incubations >180 days; (14)C-benzo(a)pyrene mineralization occurred after a 28-day lag period(6). In soils from Alert (contaminated with Arctic diesel fuel), Saglek (from a radar installation), Varta (from a former gasworks site), and Westbrook (not known to be polluted), the percent removal of benzo(a)pyrene (10 ug/mL concn) from enrichment cultures after 90 days incubation under aerobic conditions were, respectively: at 20°C, 68, 76, 60, and 27; at 7°C, 33, 31, 34 and 37(7).

12.3 Bioaccumulative potential

Gillichthys mirabilis (mudsucker) exposed to benzo(a)pyrene /concn not specified/ for 96 hr exhibited a bioconcentration factor of 0.048; Oligocottus maculosus (tidepool sculpin) exposed to benzo(a)pyrene /concn not specified/ for 1 hr exhibited a bioconcentration factor of 0.13; Citharichthys stigmacus (sand dab) exposed to benzo(a)pyrene /concn not specified/ for 1 hr exhibited a bioconcentration factor of 0.02. /Edible tissue/

12.4 Mobility in soil

Sorption coefficients for benzo(a)pyrene obtained during 48 hour batch experiments using two lake sediments with organic carbon content of 1.87 and 2.07%, and a high chemical concentration were 7,000 and 22,000, respectively(1). Sorption coefficients obtained from 48 hour batch experiments using a low benzo(a)pyrene concentration were 8,700 and 35,000 using lake sediments with 1.87% and 2.07% organic carbon, respectively(1). These values correspond to estimated Koc values of 2.7X10+5, 1.1X10+6, 4.7X10+5, and 1.7X10+6(SRC) using a regression-derived equation(2).. Sorption removal accounted for >3.0% and >3.2% of the benzo(a)pyrene present in the influent of a high-loaded laboratory scale activated sludge reactor and a biological aerated filter reactor, respectively; the calculated adsorption removal may be conservatively low because the sludge samples were dried before analysis(3). Kd, soil/water partition coefficients, of 18.2 and 69.0 were determined in Kidman sandy loam, 0.51% organic carbon, and Nunn clay loam, 1.1% organic carbon(4). These values correspond to Koc values of 930 and 6300, respectively(SRC), using a regression-derived equation(2).. Measured log Koc values ranged from 6.00 to 6.28 in sediments and porewater isolated from three cores from Boston Harbor, MA(5). Sorption partition coefficients for benzo(a)pyrene with natural dissolved organic carbon from Lake Ketelmeer ranged from 2.8X10+6 at 45°C to 1.6X10+7 at 16°C(6). A sorption partition coefficient of 2.5X10+6 was observed for benzo(a)pyrene with particulate organic matter from Lake Ketelmeer at 20°C(6). Average partition coefficients for benzo(a)pyrene in natural interstitial waters ranged from 2.2X10+3 and 9.0X10+6 for Government Pond, Grand Haven, MI and Lake Michigan, respectively(7). Sorption of (14)C-benzo(a)pyrene on sediment collected in the harbor of Rotterdam was measured using batch experiments; cosolvent partition coefficients(log) ranged from 5.2 to 6.3(8). Partition coefficients (log) for (14)C-benzo(a)pyrene using fulvic and humic acids derived from salt-marsh estuaries ranged from 3.48 to 3.86 and 4.12 to 4.29, respectively(9). Benzo(a)pyrene log Kp values ranged from 5.18 to 5.79 in porewater and 4.90 to 5.36 in elutriates(10). 22% benzo(a)pyrene removal over 36 days in an activated sludge pilot reactor was attributed to adsorption to sludge(11). According to a recommended classification scheme(12), these Koc values suggest that benzo(a)pyrene is expected to have low to no mobility in soil(SRC).

12.5 Other adverse effects

no data available

13.Disposal considerations

13.1 Disposal methods

Product

The material can be disposed of by removal to a licensed chemical destruction plant or by controlled incineration with flue gas scrubbing. Do not contaminate water, foodstuffs, feed or seed by storage or disposal. Do not discharge to sewer systems.

Contaminated packaging

Containers can be triply rinsed (or equivalent) and offered for recycling or reconditioning. Alternatively, the packaging can be punctured to make it unusable for other purposes and then be disposed of in a sanitary landfill. Controlled incineration with flue gas scrubbing is possible for combustible packaging materials.

14.Transport information

14.1 UN Number

ADR/RID: UN3077 IMDG: UN3077 IATA: UN3077

14.2 UN Proper Shipping Name

ADR/RID: ENVIRONMENTALLY HAZARDOUS SUBSTANCE, SOLID, N.O.S.
IMDG: ENVIRONMENTALLY HAZARDOUS SUBSTANCE, SOLID, N.O.S.
IATA: ENVIRONMENTALLY HAZARDOUS SUBSTANCE, SOLID, N.O.S.

14.3 Transport hazard class(es)

ADR/RID: 9 IMDG: 9 IATA: 9

14.4 Packing group, if applicable

ADR/RID: III IMDG: III IATA: III

14.5 Environmental hazards

ADR/RID: yes IMDG: yes IATA: yes

14.6 Special precautions for user

no data available

14.7 Transport in bulk according to Annex II of MARPOL 73/78 and the IBC Code

no data available

15.Regulatory information

15.1 Safety, health and environmental regulations specific for the product in question

Chemical name Common names and synonyms CAS number EC number
benzo[a]pyrene benzo[a]pyrene 50-32-8 none
European Inventory of Existing Commercial Chemical Substances (EINECS) Listed.
EC Inventory Listed.
United States Toxic Substances Control Act (TSCA) Inventory Listed.
China Catalog of Hazardous chemicals 2015 Not Listed.
New Zealand Inventory of Chemicals (NZIoC) Listed.
Philippines Inventory of Chemicals and Chemical Substances (PICCS) Listed.
Vietnam National Chemical Inventory Listed.
Chinese Chemical Inventory of Existing Chemical Substances (China IECSC) Listed.

16.Other information

Information on revision

Creation Date Aug 11, 2017
Revision Date Aug 11, 2017

Abbreviations and acronyms

  • CAS: Chemical Abstracts Service
  • ADR: European Agreement concerning the International Carriage of Dangerous Goods by Road
  • RID: Regulation concerning the International Carriage of Dangerous Goods by Rail
  • IMDG: International Maritime Dangerous Goods
  • IATA: International Air Transportation Association
  • TWA: Time Weighted Average
  • STEL: Short term exposure limit
  • LC50: Lethal Concentration 50%
  • LD50: Lethal Dose 50%
  • EC50: Effective Concentration 50%

References

  • IPCS - The International Chemical Safety Cards (ICSC), website: http://www.ilo.org/dyn/icsc/showcard.home
  • HSDB - Hazardous Substances Data Bank, website: https://toxnet.nlm.nih.gov/newtoxnet/hsdb.htm
  • IARC - International Agency for Research on Cancer, website: http://www.iarc.fr/
  • eChemPortal - The Global Portal to Information on Chemical Substances by OECD, website: http://www.echemportal.org/echemportal/index?pageID=0&request_locale=en
  • CAMEO Chemicals, website: http://cameochemicals.noaa.gov/search/simple
  • ChemIDplus, website: http://chem.sis.nlm.nih.gov/chemidplus/chemidlite.jsp
  • ERG - Emergency Response Guidebook by U.S. Department of Transportation, website: http://www.phmsa.dot.gov/hazmat/library/erg
  • Germany GESTIS-database on hazard substance, website: http://www.dguv.de/ifa/gestis/gestis-stoffdatenbank/index-2.jsp
  • ECHA - European Chemicals Agency, website: https://echa.europa.eu/

Disclaimer: The above information is believed to be correct but does not purport to be all inclusive and shall be used only as a guide. The information in this document is based on the present state of our knowledge and is applicable to the product with regard to appropriate safety precautions. It does not represent any guarantee of the properties of the product. We as supplier shall not be held liable for any damage resulting from handling or from contact with the above product.
MSDS
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Name: Benzo[a]pyrene 96.5% Material Safety Data Sheet
Synonym: 3,4-Benzopyrene; 3,4-Benzpyrene; Benzo[def]chrysen
CAS: 50-32-8
Section 1 - Chemical Product   MSDS Name:Benzo[a]pyrene 96.5% Material Safety Data Sheet
Synonym:3,4-Benzopyrene; 3,4-Benzpyrene; Benzo[def]chrysen

Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS
CAS# Chemical Name content EINECS#
50-32-8 Benzo[a]pyrene 96.5% 200-028-5
Hazard Symbols: T N
Risk Phrases: 45 46 60 61 50/53

Section 3 - HAZARDS IDENTIFICATION
  EMERGENCY OVERVIEW
May cause cancer. May cause heritable genetic damage. May impair fertility. May cause harm to the unborn child. Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
Potential Health Effects
Eye:
May cause eye irritation.
Skin:
May cause skin irritation. May be harmful if absorbed through the skin.
Ingestion:
May cause irritation of the digestive tract. May be harmful if swallowed.
Inhalation:
May cause respiratory tract irritation. May be harmful if inhaled.
Chronic:
May cause cancer in humans. Chronic exposure may cause reproductive disorders and teratogenic effects. Laboratory experiments have resulted in mutagenic effects.

Section 4 - FIRST AID MEASURES
  Eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.
Skin:
Get medical aid. Flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes.
Ingestion:
Get medical aid. Wash mouth out with water.
Inhalation:
Remove from exposure and move to fresh air immediately.
Notes to Physician:
Treat symptomatically and supportively.

Section 5 - FIRE FIGHTING MEASURES
  General Information:
As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear.
Extinguishing Media:
Use water spray, dry chemical, carbon dioxide, or chemical foam.

Section 6 - ACCIDENTAL RELEASE MEASURES
  General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks:
Vacuum or sweep up material and place into a suitable disposal container.

Section 7 - HANDLING and STORAGE
  Handling:
Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes. Use only in a chemical fume hood.
Storage:
Store in a cool, dry place. Store in a tightly closed container.

Section 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION
  Engineering Controls:
Use adequate ventilation to keep airborne concentrations low.
Personal Protective Equipment Eyes: Not available.
Skin:
Wear appropriate protective gloves to prevent skin exposure.
Clothing:
Wear appropriate protective clothing to prevent skin exposure.
Respirators:
Follow the OSHA respirator regulations found in 29 CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.

Section 9 - PHYSICAL AND CHEMICAL PROPERTIES
 
Physical State: Powder
Color: yellow to yellow-green - yellow-brown
Odor: Not available.
pH: Not available.
Vapor Pressure: Not available.
Viscosity: Not available.
Boiling Point: 495 deg C @760mmHg
Freezing/Melting Point: 175 - 179 deg C
Autoignition Temperature: Not available.
Flash Point: Not available.
Explosion Limits, lower: Not available.
Explosion Limits, upper: Not available.
Decomposition Temperature:
Solubility in water: 3 mg/l
Specific Gravity/Density:
Molecular Formula: C20H12
Molecular Weight: 252.31

Section 10 - STABILITY AND REACTIVITY
  Chemical Stability:
Stable under normal temperatures and pressures.
Conditions to Avoid:
Incompatible materials.
Incompatibilities with Other Materials:
Strong oxidizing agents.
Hazardous Decomposition Products:
Carbon monoxide, carbon dioxide.
Hazardous Polymerization: Will not occur.

Section 11 - TOXICOLOGICAL INFORMATION
  RTECS#:
CAS# 50-32-8: DJ3675000 LD50/LC50:
Not available.
Carcinogenicity:
Benzo[a]pyrene - ACGIH: A1 - Confirmed Human Carcinogen (as benzene soluble aeroso California: carcinogen, initial date 7/1/87 NTP: Suspect carcinogen IARC: Group 1 carcinogen (listed as Coal tar pitches).
Other:
See actual entry in RTECS for complete information.

Section 12 - ECOLOGICAL INFORMATION
  Ecotoxicity:
Fish (Neanthes arenaceodentata) LD50 < 1 ppm (96H) Daphnia (Daphnia pulex) EC50 = 0.05 mg/L (96H) BCF (oysters) = 3000 BCF (rainbow trout) = 920 BCF (bluegill sunfish) = 2657 BCF (Daphnia magna) = 1000 BCF (Daphnia pulex) = 13000 Log Pow = 6.35

Section 13 - DISPOSAL CONSIDERATIONS
  Dispose of in a manner consistent with federal, state, and local regulations.

Section 14 - TRANSPORT INFORMATION
 
IATA
Shipping Name: ENVIRONMENTALLY HAZARDOUS SUBSTANCE, SOLID, N.O.S.
*
Hazard Class: 9
UN Number: 3077
Packing Group: III
IMO
Shipping Name: ENVIRONMENTALLY HAZARDOUS SUBSTANCE, SOLID, N.O.S.
Hazard Class: 9
UN Number: 3077
Packing Group: III
RID/ADR
Shipping Name: ENVIRONMENTALLY HAZARDOUS SUBSTANCE, SOLID, N.O.S.
Hazard Class: 9
UN Number: 3077
Packing group: III
USA RQ:CAS# 50-32-8: 1 lb final RQ; 0.454 kg final RQ

Section 15 - REGULATORY INFORMATION
 
European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: T N
Risk Phrases:
R 45 May cause cancer.
R 46 May cause heritable genetic damage.
R 61 May cause harm to the unborn child.
R 50/53 Very toxic to aquatic organisms, may cause
long-term adverse effects in the aquatic environment.
R 60 May impair fertility.
Safety Phrases:
S 53 Avoid exposure - obtain special instructions
before use.
S 45 In case of accident or if you feel unwell, seek
medical advice immediately (show the label where
possible).
S 60 This material and its container must be
disposed of as hazardous waste.
S 61 Avoid release to the environment. Refer to
special instructions/safety data sheets.
WGK (Water Danger/Protection)
CAS# 50-32-8: No information available.
United Kingdom Occupational Exposure Limits
United Kingdom Maximum Exposure Limits
Canada
CAS# 50-32-8 is listed on Canada's DSL List.
CAS# 50-32-8 is listed on Canada's Ingredient Disclosure List.
Exposure Limits
CAS# 50-32-8: OEL-AUSTRALIA;Carcinogen
OEL-BELGIUM;Carcinogen
OEL-FINLAND:TWA 0.01 mg/m3;Skin;Carcinogen
OEL-FRANCE;Carcinogen
OEL-GERMANY;Carcinogen
OEL-RUSSIA:STEL 0.00015 mg/m3;Carcinogen
OEL-SWEDEN:TWA 0.005 mg/m3;STEL 0.03 mg/m3;Skin
OEL IN BULGARIA, COLOMBIA, JORDAN, KOREA check ACGIH TLV
OEL IN NEW ZEALAND, SINGAPORE, VIETNAM check ACGI TLV
US FEDERAL
TSCA
CAS# 50-32-8 is listed on the TSCA inventory.


SECTION 16 - ADDITIONAL INFORMATION
N/A

Spectrum

NMR Spectrum 1H NMR : Predict
expand collapse

Synthesis Route

1.Synthesis Route
2.Synthesis Route
3.Synthesis Route

Toxicity

SKIN/EYE IRRITATION DATA
expand collapse
Type of Test
Standard Draize test
Exposure Route
Administration onto the skin
Species Observed
Rodent - mouse
Dose/Duration
14 ug
Toxic Effects
--
Reference
Cancer Letters (Shannon, Ireland). (Elsevier Scientific Pub. Ireland Ltd., POB 85, Limerick, Ireland) V.1- 1975- Volume(issue)/page/year: 4,333,1978
ACUTE TOXICITY DATA
expand collapse
Type of Test
LD50 - Lethal dose, 50 percent kill
Exposure Route
Subcutaneous
Species Observed
Rodent - rat
Dose/Duration
50 mg/kg
Toxic Effects
Details of toxic effects not reported other than lethal dose value--
Reference
Zeitschrift fuer Krebsforschung. (Berlin, Fed. Rep. Ger.) V.1-75, 1903-71. For publisher information, see JCROD7. Volume(issue)/page/year: 69,103,1967
ACUTE TOXICITY DATA
expand collapse
Type of Test
LDLo - Lowest published lethal dose
Exposure Route
Intraperitoneal
Species Observed
Rodent - mouse
Dose/Duration
500 mg/kg
Toxic Effects
Details of toxic effects not reported other than lethal dose value--
Reference
Toxicology and Applied Pharmacology. (Academic Press, Inc., 1 E. First St., Duluth, MN 55802) V.1- 1959- Volume(issue)/page/year: 23,288,1972

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