INTOX Home Page
METHACRYLIC ACID ICSC: 0917
Date of Peer Review: March 1996

2-Methylpropenoic acid
alpha-Methylacrylic acid
CAS # 79-41-4 C4H6O2 / CH2=C(CH3)COOH
RTECS # OZ2975000 Molecular mass: 86.09
UN # 2531 (stabilized)
EC Index # 607-088-00-5
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Combustible. Gives off irritating or toxic fumes (or gases) in a fire.
NO open flames.
AFFF, alcohol-resistant foam, powder, carbon dioxide.
EXPLOSION Above 77C explosive vapour/air mixtures may be formed.
Above 77C use a closed system, ventilation.
In case of fire: keep drums, etc., cool by spraying with water.
EXPOSURE
AVOID ALL CONTACT!

Inhalation Cough. Burning sensation. Shortness of breath. Laboured breathing.
Ventilation (not if powder), local exhaust, or breathing protection.
Fresh air, rest. Half-upright position. Refer for medical attention.
Skin Redness. Skin burns. Pain. Blisters.
Protective clothing.
First rinse with plenty of water, then remove contaminated clothes and rinse again.
Eyes Redness. Pain. Loss of vision. Severe deep burns.
Face shield.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
Ingestion Abdominal cramps. Abdominal pain. Burning sensation. Weakness.
Do not eat, drink, or smoke during work. Wash hands before eating.
Rinse mouth. Rest. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Collect leaking liquid in sealable plastic containers. Cautiously neutralize remainder with aqueous sodium carbonate or lime. Then wash away with plenty of water. Do NOT absorb in saw-dust or other combustible absorbents. Personal protection: complete protective clothing including self-contained breathing apparatus.
Do not transport with food and feedstuffs.
EU Classification
Symbol: C
R: 21/22-35
S: (1/2-)-26-36/37/39-45
Note: [D]
UN Classification
UN Hazard Class: 8
UN Pack Group: II
EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-80S2531
NFPA Code: H3; F2; R2;
Separated from strong oxidants, food and feedstuffs. Cool. Keep in the dark. Keep in a well-ventilated room. Store only if stabilized.
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
METHACRYLIC ACID ICSC: 0917
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
COLOURLESS LIQUID OR COLOURLESS CRYSTALS, WITH CHARACTERISTIC ODOUR.

PHYSICAL DANGERS:
The vapours are uninhibited and may polymerize causing blockage of vents.

CHEMICAL DANGERS:
The substance willl polymerize readily due to heating or under the influence of light, oxidizing agents such as peroxides, or in the presence of traces of hydrochloric acid, with fire or explosion hazard. Attacks metals.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 20 ppm as TWA; (ACGIH 2004).
MAK: 5 ppm, 18 mg/m; Peak limitation category: I(2); Pregnancy risk group: C; (DFG 2005).
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation.

INHALATION RISK:
A harmful contamination of the air will be reached rather slowly on evaporation of this substance at 20C.

EFFECTS OF SHORT-TERM EXPOSURE:
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).

PHYSICAL PROPERTIES
Boiling point: 159-163C
Melting point: 16C
Relative density (water = 1): 1.02
Solubility in water: moderate
Vapour pressure, Pa at 25C: 130
Relative vapour density (air = 1): 2.97
Relative density of the vapour/air-mixture at 20C (air = 1): 1.00
Flash point: 77C o.c., 68C c.c.
Explosive limits, vol% in air: 1.6-8.8
Octanol/water partition coefficient as log Pow: 0.93
ENVIRONMENTAL DATA

NOTES
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. An added stabilizer or inhibitor can influence the toxicological properties of this substance, consult an expert. > Card has been partly updated in October 2004 and 2005. See sections Occupational Exposure Limits, EU classification, 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