91-80-5 structure, C14H19N3S

methapyrilene

CAS No.

91-80-5

Formula:

C14H19N3S

Basic Info

Methapyrilene is an antihistamine and anticholinergic of the pyridine chemical class which was developed in the early 1950s. It was sold under the trade names Co-Pyronil and Histadyl EC. It has relatively strong sedative effects, to the extent that its primary use was as a medication for insomnia rather than for its antihistamine action. Together with scopolamine, it was the main ingredient in Sominex, Nytol, and Sleep-Eze. It also provided the sedative component of Excedrin PM. All of these products were reformulated in the late 1970s when methapyrilene was demonstrated to cause liver cancer in rats when given chronically.

Formula
C14H19N3S
Molecular Weight
261.386
Exact Mass
261.13
LogP
2.7113
PSA
47.61
Synonyms

1,2-Ethanediamine, N,N-dimethyl-N‘-2-pyridinyl-N‘-(2-thienylmethyl)-

Semikon

Tenalin

Thenylene

Thionylan

Pyrinistol

Pyrinistab

Restryl

metapyrilene

N,N-dimethyl-N'-pyridin-2-yl-N'-(thiophen-2-ylmethyl)ethane-1,2-diamine

Methapyrilen

Thenylpyramine

Paradormalene

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Properties

Appearance & Physical State
colourless liquid
Boiling Point
173 - 175ºC at 3 mm Hg
Stability
Stable. Incompatible with strong oxidizing agents.

Safety Info

RIDADR
UN 1851
Hazard Class
6.1(b)
Packing Group
III

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 17, 2017

Revision Date: Aug 17, 2017

1.Identification

1.1 GHS Product identifier

Product name methapyrilene

1.2 Other means of identification

Product number -
Other names 1,2-Ethanediamine, N,N-dimethyl-N‘-2-pyridinyl-N‘-(2-thienylmethyl)-

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
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

Acute toxicity - Oral, Category 3

2.2 GHS label elements, including precautionary statements

Pictogram(s)
Signal word

Danger

Hazard statement(s)

H301 Toxic if swallowed

Precautionary statement(s)
Prevention

P264 Wash ... thoroughly after handling.

P270 Do not eat, drink or smoke when using this product.

Response

P301+P310 IF SWALLOWED: Immediately call a POISON CENTER/doctor/…

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

P330 Rinse mouth.

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
methapyrilene methapyrilene 91-80-5 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

If breathed in, move person into fresh air. If not breathing, give artificial respiration. Consult a physician.

In case of skin contact

Wash off with soap and plenty of water. Consult a physician.

In case of eye contact

Rinse thoroughly with plenty of water for at least 15 minutes and consult a physician.

If swallowed

Never give anything by mouth to an unconscious person. Rinse mouth with water. Consult a physician.

4.2 Most important symptoms/effects, acute and delayed

ACUTE/CHRONIC HAZARDS: This material is highly toxic by ingestion.

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

Minimum/Potential Fatal Human Dose

A death has been reported from an oral dose as small as 12 mg/kg, but others have survived after 80 mg/kg.

Absorption, Distribution and Excretion

DURATION OF ACTION: 4-6 HR. /METHAPYRILENE HYDROCHLORIDE, FROM TABLE/

5.Fire-fighting measures

5.1 Extinguishing media

Suitable extinguishing media

Fires involving this compound should be controlled with a dry chemical, carbon dioxide or Halon extinguisher.

5.2 Specific hazards arising from the chemical

Flash point data for this chemical are not available, but it is probably combustible.

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

Prevent further leakage or spillage if safe to do so. Do not let product enter drains. Discharge into the environment must be avoided.

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

Store in cool place. Keep container tightly closed in a dry and well-ventilated place.

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 liquid
Colour LIQUID
Odour no data available
Melting point/ freezing point no data available
Boiling point or initial boiling point and boiling range 173 - 175ºC at 3 mm Hg
Flammability no data available
Lower and upper explosion limit / flammability limit no data available
Flash point no data available
Auto-ignition temperature no data available
Decomposition temperature no data available
pH no data available
Kinematic viscosity no data available
Solubility no data available
Partition coefficient n-octanol/water (log value) no data available
Vapour pressure 7.0X10-4 mm Hg at 25°C (extrapolated from vapor pressure data at higher temperatures, SRC)
Density and/or relative density no data available
Relative vapour density no data available
Particle characteristics no data available

10.Stability and reactivity

10.1 Reactivity

no data available

10.2 Chemical stability

Stable under recommended storage conditions.

10.3 Possibility of hazardous reactions

An amine, organosulfide. Organosulfides are incompatible with acids, diazo and azo compounds, halocarbons, isocyanates, aldehydes, alkali metals, nitrides, hydrides, and other strong reducing agents. Reactions with these materials generate heat and in many cases hydrogen gas. Many of these compounds may liberate hydrogen sulfide upon decomposition or reaction with an acid. Amines are chemical bases. They neutralize acids to form salts plus water. These acid-base reactions are exothermic. The amount of heat that is evolved per mole of amine in a neutralization is largely independent of the strength of the amine as a base. Amines may be incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. Flammable gaseous hydrogen is generated by amines in combination with strong reducing agents, such as hydrides.

10.4 Conditions to avoid

no data available

10.5 Incompatible materials

no data available

10.6 Hazardous decomposition products

no data available

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

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

no data available

12.3 Bioaccumulative potential

An estimated BCF of 71 can be calculated(2,SRC) from an estimated log Kow of 2.74(1) using a recommended regression equation(2,SRC). Based upon this estimated BCF, methapyrilene will not be expected to significantly bioconcentrate in aquatic organisms (SRC).

12.4 Mobility in soil

An estimated Koc of 737 can be calculated(2,SRC) from an estimated log Kow of 2.74(1) using a recommended regression equation(2,SRC). Based upon this estimated Koc, methapyrilene will be expected to exhibit low mobility in soil(3,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: UN1851 IMDG: UN1851 IATA: UN1851

14.2 UN Proper Shipping Name

ADR/RID: MEDICINE, LIQUID, TOXIC, N.O.S.
IMDG: MEDICINE, LIQUID, TOXIC, N.O.S.
IATA: MEDICINE, LIQUID, TOXIC, N.O.S.

14.3 Transport hazard class(es)

ADR/RID: 6.1(b) IMDG: 6.1(b) IATA: 6.1(b)

14.4 Packing group, if applicable

ADR/RID: III IMDG: III IATA: III

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
methapyrilene methapyrilene 91-80-5 none
European Inventory of Existing Commercial Chemical Substances (EINECS) Listed.
EC Inventory Listed.
United States Toxic Substances Control Act (TSCA) Inventory Not Listed.
China Catalog of Hazardous chemicals 2015 Not Listed.
New Zealand Inventory of Chemicals (NZIoC) Listed.
Philippines Inventory of Chemicals and Chemical Substances (PICCS) Not Listed.
Vietnam National Chemical Inventory Not Listed.
Chinese Chemical Inventory of Existing Chemical Substances (China IECSC) Not Listed.

16.Other information

Information on revision

Creation Date Aug 17, 2017
Revision Date Aug 17, 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.

Spectrum

NMR Spectrum 1H NMR : Predict
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Analysis Methods

Kovats' RI, non-polar column, isothermal
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Column Shape
Capillary
Active Phase(℃)
BP-1
Retention index
1981.
Temperature Control
200.
Method
isothermal
Comments
25. m/0.22 mm/0.25 μm, N2
Reference
Japp, M.Gill, R.Osselton, M.D.Comparison of drug retention indices determined on packed, wide bore capillary and narrow bore capillary columnsJ. Forensic Sci.1987, 32, 6, 1574-1586.
Kovats' RI, non-polar column, isothermal
expand collapse
Column Shape
Capillary
Active Phase(℃)
BP-1
Retention index
1993.
Temperature Control
200.
Method
isothermal
Comments
25. m/0.53 mm/1. μm, N2
Reference
Japp, M.Gill, R.Osselton, M.D.Comparison of drug retention indices determined on packed, wide bore capillary and narrow bore capillary columnsJ. Forensic Sci.1987, 32, 6, 1574-1586.
Kovats' RI, non-polar column, isothermal
expand collapse
Column Shape
Packed
Active Phase(℃)
OV-1
Retention index
1985.
Temperature Control
200.
Method
isothermal
Comments
 
Reference
Berninger, H.Möller, M.R.Retentionsindices zur gaschromatographischen Identifizierung von ArzneimittelnArch. Toxicol.1977, 37, 4, 295-305.
Kovats' RI, non-polar column, temperature ramp
expand collapse
Column Shape
Capillary
Active Phase(℃)
SE-30
Retention index
1974.
Temperature Control
Method
temperature ramp
Comments
25. m/0.49 mm/1.14 μm, 100. C @ 2. min, 8. K/min, 275. C @ 15. min
Reference
Schepers, P.Wijsbeek, J.Franke, J.P.de Zeeuw, R.A.Applicability of capillary gas chromatography to substance identification in toxicology by means of retention indicesJ. Forensic Sci.1982, 27, 1, 49-60.
Kovats' RI, non-polar column, custom temperature program
expand collapse
Column Shape
Packed
Active Phase(℃)
OV-101
Retention index
1980.
Temperature Control
Method
custom temperature program
Comments
N2, Chromosorb W; Column length: 2. m; Program: not specified
Reference
McLinden, V.J.Stenhouse, A.M.A chromatography system for drug identificationForensic Sci. Int.1979, 13, 71-79.

Toxicity

ACUTE TOXICITY DATA
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Type of Test
LD50 - Lethal dose, 50 percent kill
Exposure Route
Subcutaneous
Species Observed
Rodent - rat
Dose/Duration
150 mg/kg
Toxic Effects
Behavioral--convulsions or effect on seizure threshold<br>Behavioral--excitement<br>Behavioral--aggression
Reference
Comptes Rendus des Seances de la Societe de Biologie et de Ses Filiales. (SPPIF, B.P.22, F-41353 Vineuil, France) V.1- 1849- Volume(issue)/page/year: 144,887,1950
ACUTE TOXICITY DATA
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Type of Test
LD50 - Lethal dose, 50 percent kill
Exposure Route
Oral
Species Observed
Rodent - mouse
Dose/Duration
182 mg/kg
Toxic Effects
Behavioral--somnolence (general depressed activity)<br>Behavioral--convulsions or effect on seizure threshold
Reference
Proceedings of the Society for Experimental Biology and Medicine. (Academic Press, Inc., 1 E. First St., Duluth, MN 55802) V.1- 1903/04- Volume(issue)/page/year: 80,458,1952
ACUTE TOXICITY DATA
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Type of Test
LD50 - Lethal dose, 50 percent kill
Exposure Route
Intraperitoneal
Species Observed
Rodent - mouse
Dose/Duration
77 mg/kg
Toxic Effects
Details of toxic effects not reported other than lethal dose value--
Reference
Journal of Pharmacology and Experimental Therapeutics. (Williams & Wilkins Co., 428 E. Preston St., Baltimore, MD 21202) V.1- 1909/10- Volume(issue)/page/year: 96,388,1949

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