Paraldehyde

CAS No. 123-63-7

Formula: C6H12O3
Basic Info

Formula
C6H12O3
Molecular Weight
132.158
Exact Mass
132.079
LogP
1.0878
PSA
27.69
Synonyms

2,4,6-Trimethyl-1,3,5-trioxacyclohexane,s-Trimethyltrioxymethylene,Acetaldehyde trimer

Elaldehyde

1,3,5-Trioxane, 2,4,6-trimethyl-

Paral

Cyclic trimer of acetaldehyde

2,4,6-Trimethyl-1,3,5-trioxane

Paracetaldehyde

PCHO

Paraldehyd

Paradehyde

ALDEFRESH

Paraldeide

para-Acetaldehyde

Acetaldehyde Trimer

FEMA 2003

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Properties
Appearance & Physical State
Colourless to yellowish clear liquid
Density
0.992
Boiling Point
124ºC
Melting Point
12ºC
Flash Point
27ºC
Refractive Index
1.4035-1.4055
Water Solubility
125 g/L (25 ºC)
Stability
Stable. Flammable. Incompatible with strong oxidizing agents, mineral acids.
Storage Condition
2-8ºC
Vapor Density
1.52 (vs air)
Vapor Pressure
25.89 psi ( 55 °C)
Safety Info
RTECS
YK0525000
Safety Statements
S16-S29-S33-S9
WGK Germany
1
Risk Statements
R11
HS Code
2912500090
RIDADR
UN 1264
Hazard Class
3.2
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 12, 2017

Revision Date: Aug 12, 2017

1.Identification

1.1 GHS Product identifier

Product name paraldehyde

1.2 Other means of identification

Product number -
Other names FEMA 2003

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only. Food additives -> Flavoring Agents
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

Flammable liquids, Category 3

2.2 GHS label elements, including precautionary statements

Pictogram(s)
Signal word

Warning

Hazard statement(s)

H226 Flammable liquid and vapour

Precautionary statement(s)
Prevention

P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.

P233 Keep container tightly closed.

P240 Ground and bond container and receiving equipment.

P241 Use explosion-proof [electrical/ventilating/lighting/...] equipment.

P242 Use non-sparking tools.

P243 Take action to prevent static discharges.

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

Response

P303+P361+P353 IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water [or shower].

P370+P378 In case of fire: Use ... to extinguish.

Storage

P403+P235 Store in a well-ventilated place. Keep cool.

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
paraldehyde paraldehyde 123-63-7 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. Refer for medical attention.

In case of skin contact

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

In case of eye contact

First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.

If swallowed

Do NOT induce vomiting. Give one or two glasses of water to drink. Refer for medical attention .

4.2 Most important symptoms/effects, acute and delayed

INHALATION AND INGESTION: Irritation, headache, bronchitis, pulmonary edema. Irritating to digestive tract. Hypnotic and analgesic properties. Incoordination and drowsiness, followed by sleep. Larger doses-coma-weak pulse and shallow respiration, cyanosis-death from respiratory paralysis. EYES: irritation-can cause serious injury. SKIN: Dermatitis (skin inflammation). (USCG, 1999)

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

Treatment is directed toward maintenance of airway, breathing, and circulation. Supportive care is the mainstay of therapy. Patients are often critically ill and must be under constant supervision.

5.Fire-fighting measures

5.1 Extinguishing media

Suitable extinguishing media

Use water spray, dry chemical, "alcohol resistant" foam, or carbon dioxide. Water may be ineffective. Use water spray to keep fire exposed containers cool. Approach fire from upwind to avoid hazardous vapors and toxic decomposition products.

5.2 Specific hazards arising from the chemical

Special Hazards of Combustion Products: Emits toxic fumes on heating. Behavior in Fire: Can react vigorously when exposed to heat or flame. Vapor is heavier than air and may travel a considerable distance to source of ignition and flash back. (USCG, 1999)

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

Remove all ignition sources. Personal protection: filter respirator for organic gases and vapours adapted to the airborne concentration of the substance. Collect leaking and spilled liquid in sealable non-plastic containers as far as possible. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations.

6.3 Methods and materials for containment and cleaning up

Pick up and arrange disposal. Sweep up and shovel. Keep in suitable, closed containers 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

Fireproof. Separated from food and feedstuffs, bases and oxidants.PARALDEHYDE SHOULD BE STORED IN WELL-FILLED, TIGHT, LIGHT-RESISTANT GLASS CONTAINERS WITH A CAPACITY OF NO MORE THAN 30 ML, AT A TEMP NOT EXCEEDING 25 DEG C.

8.Exposure controls/personal protection

8.1 Control parameters

Occupational Exposure limit values

no data available

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 Colourless to yellowish clear liquid
Colour COLORLESS, TRANSPARENT LIQUID
Odour CHARACTERISTIC AROMATIC ODOR
Melting point/ freezing point 12ºC
Boiling point or initial boiling point and boiling range 124ºC
Flammability Highly flammable.
Lower and upper explosion limit / flammability limit LOWER LIMIT, 1.3%.
Flash point 27ºC
Auto-ignition temperature 237.78°C (USCG, 1999)
Decomposition temperature no data available
pH no data available
Kinematic viscosity 1.128 centipoise at 70 deg F
Solubility In water:125 g/L (25 ºC)
Partition coefficient n-octanol/water (log value) Log Kow = 0.67
Vapour pressure 25.89 psi ( 55 °C)
Density and/or relative density 0.992
Relative vapour density 1.52 (vs air)
Particle characteristics no data available

10.Stability and reactivity

10.1 Reactivity

no data available

10.2 Chemical stability

ON EXPOSURE TO LIGHT & AIR, IT DECOMP TO ACETALDEHYDE & IS OXIDIZED TO ACETIC ACID

10.3 Possibility of hazardous reactions

DANGEROUS, WHEN EXPOSED TO HEAT, FLAME OR OXIDIZERS.The vapour is heavier than air and may travel along the ground; distant ignition possible.PARALDEHYDE is an ether derivative. This compound is decomposed by light and air, on prolonged storage, to acetaldehyde and acetic acid. Incompatible with alkalis, hydrocyanic acid iodides and oxidizers.

10.4 Conditions to avoid

no data available

10.5 Incompatible materials

Paraldehyde is incompatible with many plastics

10.6 Hazardous decomposition products

EMITS TOXIC FUMES ON HEATING.

11.Toxicological information

Acute toxicity

  • Oral: LD50 Dog oral (acute) 3.0 to 4.0 g/kg
  • 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

no data available

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: no data available
  • Toxicity to daphnia and other aquatic invertebrates: no data available
  • Toxicity to algae: no data available
  • Toxicity to microorganisms: no data available

12.2 Persistence and degradability

Japanese MITI, initial concn 100 ppm, 14 days <30% BODT, activated sludge inoculum(1). A bacterium isolated from sewage, C. paraldehydium KY 4359, was found to degrade paraldehyde to acetaldehyde and acetic acid(2).

12.3 Bioaccumulative potential

Based on a water solubility of 125,000 mg/l at 25°C and a log Kow of 0.67, bioconcentration factors (BCF) of 0.8-2 were estimated for paraldehyde(1,2,3,SRC). These BCF values suggest that paraldehyde would not bioaccumulate significantly in aquatic organisms(SRC).

12.4 Mobility in soil

Soil adsorption coefficients (Koc) of 7-55 were estimated for paraldehyde using linear regression equations based on a water solubility of 125,000 mg/l at 25°C and a log Kow of 0.67(1,2,3,SRC). These Koc values suggest that paraldehyde would be very highly mobile in soil and that adsorption to suspended solids and sediments in water would be insignificant(4,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: UN1264 IMDG: UN1264 IATA: UN1264

14.2 UN Proper Shipping Name

ADR/RID: PARALDEHYDE
IMDG: PARALDEHYDE
IATA: PARALDEHYDE

14.3 Transport hazard class(es)

ADR/RID: 3 IMDG: 3 IATA: 3

14.4 Packing group, if applicable

ADR/RID: II IMDG: II IATA: II

14.5 Environmental hazards

ADR/RID: no IMDG: no IATA: no

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
paraldehyde paraldehyde 123-63-7 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 Listed.
New Zealand Inventory of Chemicals (NZIoC) Listed.
Philippines Inventory of Chemicals and Chemical Substances (PICCS) Listed.
Vietnam National Chemical Inventory Not Listed.
Chinese Chemical Inventory of Existing Chemical Substances (China IECSC) Listed.

16.Other information

Information on revision

Creation Date Aug 12, 2017
Revision Date Aug 12, 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: Paraldehyde Material Safety Data Sheet
Synonym: 2,4,6-Trimethyl-1,3,5-trioxane; Paracetaldehyd
CAS: 123-63-7
Section 1 - Chemical Product   MSDS Name:Paraldehyde Material Safety Data Sheet
Synonym:2,4,6-Trimethyl-1,3,5-trioxane; Paracetaldehyd

Section 2 - COMPOSITION, INFORMATION ON INGREDIENTS
CAS# Chemical Name content EINECS#
123-63-7 Paraldehyde 100.0 204-639-8
Hazard Symbols: F
Risk Phrases: 11

Section 3 - HAZARDS IDENTIFICATION
  EMERGENCY OVERVIEW
Highly flammable.
Potential Health Effects
Eye:
Causes eye irritation. May result in corneal injury.
Skin:
Exposure may cause irritation characterized by redness, dryness, and inflammation.
Ingestion:
May cause irritation of the digestive tract. May cause central nervous system depression, kidney damage, and liver damage. Symptoms may include: headache, excitement, fatigue, nausea, vomiting, stupor, and coma.
Inhalation:
Inhalation of high concentrations may cause central nervous system effects characterized by nausea, headache, dizziness, unconsciousness and coma. Causes respiratory tract irritation. May cause liver and kidney damage.
Chronic:
Prolonged or repeated skin contact may cause dermatitis. Chronic inhalation may cause effects similar to those of acute inhalation.

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 immediately.
Skin:
Flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists.
Ingestion:
If victim is conscious and alert, give 2-4 cupfuls of milk or water.
Get medical aid immediately.
Inhalation:
Get medical aid immediately. Remove from exposure and move to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
Notes to Physician:

Section 5 - FIRE FIGHTING MEASURES
  General Information:
Containers can build up pressure if exposed to heat and/or fire. As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Vapors can travel to a source of ignition and flash back. Use water spray to keep fire-exposed containers cool.
Extinguishing Media:
Use dry chemical, carbon dioxide, or alcohol-resistant foam.

Section 6 - ACCIDENTAL RELEASE MEASURES
  General Information: Use proper personal protective equipment as indicated in Section 8.
Spills/Leaks:
Absorb spill with inert material (e.g. vermiculite, sand or earth), then place in suitable container. Wear appropriate protective clothing to minimize contact with skin. Remove all sources of ignition.

Section 7 - HANDLING and STORAGE
  Handling:
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Avoid contact with eyes, skin, and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
Storage:
Keep away from sources of ignition. Store in a tightly closed container.

Section 8 - EXPOSURE CONTROLS, PERSONAL PROTECTION
  Engineering Controls:
Use process enclosure, local exhaust ventilation, or other engineering controls to control airborne levels below recommended exposure limits.
Exposure Limits CAS# 123-63-7: Russia: 5 mg/m3 TWA Personal Protective Equipment Eyes: Wear chemical splash goggles and face shield.
Skin:
Wear appropriate gloves to prevent skin exposure.
Clothing:
Wear polyethylene gloves, apron, and/or clothing.
Respirators:
Follow the OSHA respirator regulations found in 29 CFR 1910.134 or European Standard EN 149. Use a NIOSH/MSHA or European Standard EN 149 approved respirator if exposure limits are exceeded or if irritation or other symptoms are experienced.

Section 9 - PHYSICAL AND CHEMICAL PROPERTIES
 
Physical State: Liquid
Color: colorless
Odor: Not available.
pH: Not available.
Vapor Pressure: Not available.
Viscosity: Not available
Boiling Point: 124 deg C
Freezing/Melting Point: 12 deg C
Autoignition Temperature: Not applicable.
Flash Point: 17 deg C ( 62.60 deg F)
Explosion Limits, lower: 1.3
Explosion Limits, upper: 7
Decomposition Temperature:
Solubility in water: Miscible with water
Specific Gravity/Density: 0.99
Molecular Formula: (CH3CHO)3
Molecular Weight: 132.0822

Section 10 - STABILITY AND REACTIVITY
  Chemical Stability:
Stable.
Conditions to Avoid:
High temperatures, temperatures above 220C.
Incompatibilities with Other Materials:
Oxidizing materials Hazardous Decomposition Products:
Carbon monoxide, carbon dioxide.
Hazardous Polymerization: Has not been reported.

Section 11 - TOXICOLOGICAL INFORMATION
  RTECS#:
CAS# 123-63-7: YK0525000 LD50/LC50:
CAS# 123-63-7: Draize test, rabbit, eye: 5 mg Severe; Oral, mouse: LD50 = 2750 mg/kg; Oral, rabbit: LD50 = 3304 mg/kg; Oral, rat: LD50 = 1530 mg/kg; Skin, rabbit: LD50 = 14100 uL/kg.
Carcinogenicity:
Paraldehyde - Not listed by ACGIH, IARC, or NTP.
Other:
See actual entry in RTECS for complete information.

Section 12 - ECOLOGICAL INFORMATION
  Other No information available.

Section 13 - DISPOSAL CONSIDERATIONS
  Products which are considered hazardous for supply are classified as Special Waste and the disposal of such chemicals is covered by regulations which may vary according to location. Contact a specialist disposal company or the local waste regulator for advice. Empty containers must be decontaminated before returning for recycling.

Section 14 - TRANSPORT INFORMATION
 
IATA
Shipping Name: PARALDEHYDE
Hazard Class: 3
UN Number: 1264
Packing Group: III
IMO
Shipping Name: PARALDEHYDE
Hazard Class: 3
UN Number: 1264
Packing Group: III
RID/ADR
Shipping Name: PARALDEHYDE
Hazard Class: 3
UN Number: 1264
Packing group: III
USA RQ: CAS# 123-63-7: 1000 lb final RQ; 454 kg final RQ

Section 15 - REGULATORY INFORMATION
 
European/International Regulations
European Labeling in Accordance with EC Directives
Hazard Symbols: F
Risk Phrases:
R 11 Highly flammable.
Safety Phrases:
S 9 Keep container in a well-ventilated place.
S 16 Keep away from sources of ignition - No
smoking.
S 29 Do not empty into drains.
S 33 Take precautionary measures against static
discharges.
WGK (Water Danger/Protection)
CAS# 123-63-7: No information available.
Canada
CAS# 123-63-7 is listed on Canada's DSL List.
CAS# 123-63-7 is listed on Canada's Ingredient Disclosure List.
US FEDERAL
TSCA
CAS# 123-63-7 is listed on the TSCA inventory.


SECTION 16 - ADDITIONAL INFORMATION
N/A
Spectrum
NMR Spectrum 1H NMR : parameter in CCl4 CH3(EQ-EQ-AX)
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IR Spectrum IR : liquid film
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Mass Spectrum Mass spectrum (electron ionization)
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Raman Spectrum Raman : 4880 A,200 M,liquid
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