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CROTONIC ACID ICSC: 0423
Date of Peer Review: March 1996

trans-2-Butenoic acid
beta-Methylacrylic acid
alpha-Crotonic acid
3-Methylacrylic acid
CAS # 3724-65-0 C4H6O2 / CH3-CH=CH-COOH
RTECS # GQ2800000 Molecular mass: 86.09
UN # 2823
EC Index #
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Combustible.
NO open flames. NO contact with strong oxidants. NO contact with hot surfaces.
Water spray, foam, powder, carbon dioxide.
EXPLOSION Above 88C explosive vapour/air mixtures may be formed. Finely dispersed particles form explosive mixtures in air.
Above 88C use a closed system, ventilation, and explosion-proof electrical equipment.
In case of fire: keep drums, etc., cool by spraying with water.
EXPOSURE
PREVENT DISPERSION OF DUST! STRICT HYGIENE!
IN ALL CASES CONSULT A DOCTOR!
Inhalation Burning sensation. Cough. Headache. Nausea. Shortness of breath. Sore throat. Symptoms may be delayed (see Notes).
Local exhaust or breathing protection.
Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer for medical attention.
Skin Skin burns. Burning sensation. Pain.
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention.
Eyes Pain. Blurred vision. Severe deep burns.
Safety goggles or eye protection in combination with breathing protection.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion Pain. Burning sensation. Diarrhoea. Sore throat. Vomiting.
Do not eat, drink, or smoke during work.
Rinse mouth. Do NOT induce vomiting. Rest. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Consult an expert! Let solidify. Sweep spilled substance into containers, then remove to safe place. Personal protection: complete protective clothing including self-contained breathing apparatus.
Airtight. Do not transport with food and feedstuffs. Unbreakable packaging.
EU Classification
UN Classification
UN Hazard Class: 8
UN Pack Group: III
EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-80GC4-II+III
NFPA Code: H3; F2; R0
Separated from food and feedstuffs, bases, oxidants, reducing agents. Dry. Keep in the dark.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 2005

SEE IMPORTANT INFORMATION ON BACK
CROTONIC ACID ICSC: 0423
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
WHITE TO YELLOW CRYSTALS, WITH PUNGENT ODOUR.

CHEMICAL DANGERS:
The substance may polymerize under the influence of UV-light or moisture. The solution in water is a weak acid. Reacts violently with bases, oxidants, reducing agents. causing fire and explosion hazard.

OCCUPATIONAL EXPOSURE LIMITS:
TLV not established.
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its aerosol and by ingestion.

EFFECTS OF SHORT-TERM EXPOSURE:
Corrosive. The substance is corrosive to the eyes, the skin and the respiratory tract. Corrosive on ingestion. Inhalation of the vapour may cause lung oedema (see Notes). The effects may be delayed. Medical observation is indicated.

PHYSICAL PROPERTIES
Boiling point: 189C
Melting point: 72C
Relative density (water = 1): 1.02
Solubility in water, g/100 ml at 25C: 9.4
Vapour pressure, Pa at 20C: 19
Relative vapour density (air = 1): 2.97
Flash point: 88C o.c.
Auto-ignition temperature: 396C
ENVIRONMENTAL DATA

NOTES
In general the substance will be transported as molten liquid. The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation are therefore essential. Immediate administration of an appropriate inhalation therapy by a doctor or a person authorized by him/her, should be considered. Card has been partly updated in October 2005. See section Emergency Response.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
IPCS, CEC 2005