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CROTONIC ACID
ICSC: 0423
Peer-Review Status: 27.03.1996 Validated
trans-2-Butenoic acid
beta-Methylacrylic acid
alpha-Crotonic acid
3-Methylacrylic acid 
CAS #: 3724-65-0 RTECS #: GQ2800000
UN #: 2823
EINECS #: 223-077-4
    Formula: C4H6O2 / CH3-CH=CH-COOH
Molecular mass: 86.09

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Combustible.  NO open flames. NO contact with strong oxidizing agents. NO contact with hot surfaces.  Use water spray, foam, powder, carbon dioxide. 
EXPLOSION Above 88°C explosive vapour/air mixtures may be formed. Finely dispersed particles form explosive mixtures in air.  Above 88°C 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.  Use 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.  Wear 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 refer for medical attention. 
Ingestion Abdominal 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! Personal protection: complete protective clothing including self-contained breathing apparatus. Let solidify. Sweep spilled substance into covered containers. Then store and dispose of according to local regulations.  Airtight.
Do not transport with food and feedstuffs. 
EC Classification
 
UN Classification
UN Hazard Class: 8; UN Pack Group: III 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-80GC4-II+III.
NFPA Code: H3; F2; R0. 
Separated from food and feedstuffs, bases, oxidants and reducing agents. Dry. Keep in the dark. 

IMPORTANT DATA
Physical State; Appearance
WHITE-TO-YELLOW CRYSTALS WITH PUNGENT ODOUR. 

Physical dangers
 

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 and reducing agents. This generates 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. 

Inhalation risk
 

Effects of short-term exposure
Corrosive. The substance is corrosive to the eyes, skin and respiratory tract. Corrosive on ingestion. Inhalation of of the vapour may cause lung oedema. See Notes. The effects may be delayed. Medical observation is indicated. 

Effects of long-term or repeated exposure
 


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

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
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.


    See Also:
       Toxicological Abbreviations