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NIOSH

ACETIC ACID

ICSC: 0363

Glacial acetic acid
Ethanoic acid
Ethylic acid
Methanecarboxylic acid
C2H4O2 / CH3COOH
Molecular mass: 60.1
ICSC # 0363 		CAS # 64-19-7
RTECS # AF1225000
UN # 2789 (>80%)
EC # 607-002-00-6
July 10, 1997 Validated

TYPES OF HAZARD/ EXPOSURE

ACUTE HAZARDS/ SYMPTOMS

PREVENTION

FIRST AID/
FIRE FIGHTING

FIRE Flammable.
NO open flames, NO sparks, and NO smoking.
Powder, alcohol-resistant foam, water spray, carbon dioxide.
EXPLOSION Above 39°C explosive vapour/air mixtures may be formed.
Above 39°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!

•INHALATION Sore throat. Cough. Burning sensation. Headache. Dizziness. Shortness of breath. Laboured breathing. Symptoms may be delayed (see Notes).
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Half-upright position. Refer for medical attention.
•SKIN Pain. Redness. Blisters. Skin burns.
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse and then wash skin with water and soap. Rinse skin with plenty of water or shower. Refer for medical attention.
•EYES Redness. Pain. Severe deep burns. Loss of vision.
Face shield 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 Abdominal pain. Burning sensation. Diarrhoea. Shock or collapse. Sore throat. Vomiting.
Do not eat, drink, or smoke during work.
Rinse mouth. Do NOT induce vomiting. Give plenty of water to drink. Refer for medical attention.

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Collect leaking liquid in sealable containers. Cautiously neutralize spilled liquid with sodium carbonate only under the responsibility of an expert. Wash away remainder with plenty of water. Personal protection: chemical protection suit including self-contained breathing apparatus.
Fireproof. Separated from food and feedstuffs . See Chemical Dangers. Keep in a well-ventilated room.
Do not transport with food and feedstuffs.
Note: B
C symbol
R: 10-35
S: 1/2-23-26-45
UN Hazard Class: 8
UN Subsidiary Risks: 3
UN Packing Group: II
ICSC: 0363 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

ACETIC ACID

ICSC: 0363

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PHYSICAL STATE; APPEARANCE:
COLOURLESS LIQUID , WITH PUNGENT ODOUR.

PHYSICAL DANGERS:


CHEMICAL DANGERS:
The substance is a weak acid. Reacts violently with oxidants and bases . Attacks many metals forming flammable/explosive gas (hydrogen - see ICSC 0001). Attacks some forms of plastic, rubber and coatings.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 10 ppm as TWA, 15 ppm as STEL; (ACGIH 2004).
MAK: IIb (not established but data is available); (DFG 2004).
OSHA PEL: TWA 10 ppm (25 mg/m3)
NIOSH REL: TWA 10 ppm (25 mg/m3) ST 15 ppm (37 mg/m3)
NIOSH IDLH: 50 ppm See: 64197


ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its vapour and by ingestion.

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

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

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Repeated or prolonged contact with skin may cause dermatitis. The substance may have effects on the gastrointestinal tract , resulting in digestive disorders including pyrosis and constipation.

PHYSICAL
PROPERTIES

Boiling point: 118°C
Melting point: 16.7°C
Relative density (water = 1): 1.05
Solubility in water:
miscible
Vapour pressure, kPa at 20°C: 1.5
Relative vapour density (air = 1): 2.1
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.02
Flash point: 39°C c.c.
Auto-ignition temperature: 427°C
Explosive limits, vol% in air: 5.4-16
Octanol/water partition coefficient as log Pow: -0.31

ENVIRONMENTAL
DATA

The substance is harmful to aquatic organisms.

N O T E S

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 is therefore essential. Immediate administration of an appropriate inhalation therapy by a doctor or a person authorized by him/her, should be considered. Other UN numbers: UN 2790 acetic acid solution (10-80% acetic acid); UN hazard class 8. Card has been partly updated in October 2005. See sections Occupational Exposure Limits, Emergency Response.
Transport Emergency Card: TEC (R)-80GCF1-II

NFPA Code: H2; F2; R0;

ADDITIONAL INFORMATION



ICSC: 0363 ACETIC ACID
(C) IPCS, CEC, 1994
IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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