ICSC 0903 - ISOBUTYRIC ACID

[List of Chemicals] [Risk Notes] [Risk Phrases] [Safety Phrases] [Danger Symbols]

ISOBUTYRIC ACID

ICSC: 0903
_{March 2002}

2-Methylpropanoic acid
Dimethylacetic acid
Propionic acid, 2-methyl-

CAS No: 79-31-2
RTECS No: NQ4375000
UN No: 2529
EC No: 607-063-00-9

C₄H₈O₂ / (CH₃)₂CHCOOH
Molecular mass: 88.11

TYPES OF HAZARD / EXPOSURE	ACUTE HAZARDS / SYMPTOMS	PREVENTION	FIRE FIGHTING
FIRE	Flammable. Gives off irritating or toxic fumes (or gases) in a fire.	NO open flames, NO sparks, and NO smoking.	Alcohol-resistant foam, powder, carbon dioxide.
EXPLOSION	Above 56°C explosive vapour/air mixtures may be formed.	Above 56°C use a closed system, ventilation, and explosion-proof electrical equipment.	In case of fire: keep drums, etc., cool by spraying with water.

EXPOSURE		AVOID ALL CONTACT!	IN ALL CASES CONSULT A DOCTOR!
Inhalation	Burning sensation. Cough. Sore throat.	Ventilation, local exhaust, or breathing protection.	Fresh air, rest. Refer for medical attention.
Skin	Redness. Skin burns. Pain.	Protective gloves. Protective clothing.	Remove contaminated clothes. Rinse skin with plenty of water or shower.
Eyes	Pain. Redness. 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 pain. Burning sensation. Shock or collapse.	Do not eat, drink, or smoke during work.	Give plenty of water to drink. Do NOT induce vomiting. Refer for medical attention.

SPILLAGE DISPOSAL	PACKAGING & LABELLING
Remove all ignition sources. Collect leaking liquid in covered containers. Wash away spilled liquid with plenty of water.	Xn Symbol R: 21/22 S: ()2 UN Hazard Class: 3 UN Subsidiary Risks: 8 UN Pack Group: III	Do not transport with food and feedstuffs.

EMERGENCY RESPONSE	STORAGE
NFPA Code: H1; F2; R0; Transport Emergency Card: TEC (R)-30GFC-III	Fireproof. Separated from strong bases, food and feedstuffs.

IMPORTANT DATA

Physical State; Appearance
COLOURLESS LIQUID, WITH CHARACTERISTIC ODOUR.

Physical dangers
The vapour is heavier than air.

Chemical dangers
The substance is a weak acid.

Occupational exposure limits
TLV not established.

Routes of exposure
The substance can be absorbed into the body by inhalation, through the skin and by ingestion.

Inhalation risk
No indication can be given about the rate in which a harmful concentration in the air is reached on evaporation of this substance at 20°C.

Effects of short-term exposure
The substance is corrosive to the eyes, the skin and the respiratory tract. Corrosive on ingestion.

PHYSICAL PROPERTIES	ENVIRONMENTAL DATA
Boiling point: 152-155°C Melting point: -47°C Relative density (water = 1): 0.95 Solubility in water, g/100 ml at 20°C: 20 Vapour pressure, kPa at 14,7°C: 0.13 Relative vapour density (air = 1): 3.0 Flash point: 56°C c.c. Auto-ignition temperature: 481°C Explosive limits, vol% in air: 2-9 Octanol/water partition coefficient as log Pow: 0.88	The substance is harmful to aquatic organisms.

NOTES

IPCS
International
Programme on
Chemical Safety

Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2002

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Updated by AS. Approved by EC. Last update: 09.05.2002