ACETIC ANHYDRIDE 0209
April 2006
CAS No: 108-24-7 Acetic acid, anhydride
RTECS No: AK1925000 Acetic oxide
UN No: 1715 Ethanoic anhydride
EC No: 607-008-00-9 Acetyl oxide
C4H6O3/(CH3CO)2O
Molecular mass: 102.1
TYPES OF
ACUTE HAZARDS/SYMPTOMS PREVENTION FIRST AID/FIRE FIGHTING
HAZARD/
EXPOSURE
FIRE Flammable. NO open flames, NO sparks, and NO Alcohol-resistant foam, powder, carbon
smoking. dioxide (see Notes).
EXPLOSION Above 49/C explosive vapour/air Above 49/C use a closed system, In case of fire: cool drums, etc., by
mixtures may be formed. ventilation, and explosion-proof electrical spraying with water but avoid contact of
equipment. the substance with water.
EXPOSURE AVOID ALL CONTACT! IN ALL CASES CONSULT A DOCTOR!
Inhalation Cough. Laboured breathing. Shortness Ventilation, local exhaust, or breathing Fresh air, rest. Half-upright position.
of breath. Sore throat. protection. Artificial respiration may be needed. Refer
for medical attention.
Skin Redness. skin burns. Pain. Blisters. Protective gloves. Protective clothing. Remove contaminated clothes. Rinse
Effects could be delayed skin with plenty of water or shower. Refer
for medical attention.
Eyes Causes watering of the eyes. Redness. Face shield or eye protection in First rinse with plenty of water for several
Pain. Burns. combination with breathing protection. minutes (remove contact lenses if easily
possible), then take to a doctor.
Ingestion Abdominal pain. Burning sensation. Do not eat, drink, or smoke during work. Rinse mouth. Do NOT induce vomiting.
Shock or collapse. Give one or two glasses of water to drink.
Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Personal protection: filter respirator for acid gases. Chemical EU classification Do not transport with food and feedstuffs.
protection suit. Use face shield. Consult an expert! C Symbol
Ventilation. Collect leaking and spilled liquid in sealable R: 10-20/22-34
containers as far as possible. Absorb remaining liquid in S: (1/2-)26-36/37/39-45
sand or inert absorbent and remove to safe place. UN classification
UN Hazard Class: 8
UN Subsidiary Risks: 3
UN Pack Group: II
GHS classification
Signal: Danger
Flame-Corr-Excl mark
Flammable liquid and vapour
Harmful if swallowed
Causes severe skin burns and eye
damage
Causes serious eye damage
EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-80S1715 Fireproof. Separated from food and feedstuffs, incompatible substances (see Chemical
NFPA Code: H 2; F 2; R 1; W Dangers). Dry.
Prepared in the context of cooperation between the International
IPCS Programme on Chemical Safety and the European Commission 漏
IPCS 2006
International
Programme on
SEE IMPORTANT INFORMATION ON THE BACK.
Chemical Safety
0209 ACETIC ANHYDRIDE
IMPORTANT DATA
Physical State; Appearance Routes of exposure
COLOURLESS LIQUID, WITH PUNGENT ODOUR. The substance can be absorbed into the body by inhalation of its vapour
and by ingestion.
Chemical dangers
The substance decomposes on burning producing toxic gases and toxic Inhalation risk
fumes including acetic acid fumes. Reacts violently with alcohols, amines, A harmful contamination of the air can be reached rather quickly on
oxidants, strong bases and water. Attacks many metals in presence of evaporation of this substance at 20/C.
water or when dry.
Effects of short-term exposure
Occupational exposure limits Tear drawing. The substance is corrosive to the eyes, the skin and the
TLV: 5 ppm as TWA (ACGIH 2006). respiratory tract. Corrosive on ingestion. Inhalation of the substance may
MAK: 5 ppm 21 mg/m3 Peak limitation category: I (I) Pregnancy risk cause asthma-like reactions.
group: D (DFG 2006).
Effects of long-term or repeated exposure
Inhalation of the substance may cause asthma-like reactions (RADS).
PHYSICAL PROPERTIES
Boiling point: 139/C Relative density of the vapour/air-mixture at 20/C (air = 1): 1.01
Melting point: -73/C Flash point: 49/C c.c.
Relative density (water = 1): 1.08 Auto-ignition temperature: 316/C
Solubility in water: Reaction Explosive limits, vol% in air: 2.7-10.3
Vapour pressure, kPa at 20/C: 0.5 Octanol/water partition coefficient as log Pow: -0.27
Relative vapour density (air = 1): 3.5
ENVIRONMENTAL DATA
NOTES
Forms acetic acid when mixed with water.
Major fires must be extinguished with large amounts of water from a distance.
Card has been partially updated in July 2007: see Occupational Exposure Limits.
ADDITIONAL INFORMATION
Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible
LEGAL NOTICE for the use which might be made of this information
漏IPCS 2006
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