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FORMIC ACID ICSC: 0485
Date of peer-review: April 1997

Hydrogen carboxylic acid
Methanoic acid
Aminic acid
Formylic acid
CAS # 64-18-6 HCOOH
RTECS # LQ4900000 Molecular mass: 46
UN # 1779
EC # 607-001-00-0
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Combustible.
NO open flames.
Powder, alcohol-resistant foam, water spray, carbon dioxide.
EXPLOSION Above 69C explosive vapour/air mixtures may be formed.
Above 69C use a closed system, ventilation.
In case of fire: keep drums, etc., cool by spraying with water.
EXPOSURE
AVOID ALL CONTACT!

Inhalation Sore throat. Cough. Burning sensation. Shortness of breath. Laboured breathing. Unconsciousness. Symptoms may be delayed (see Notes).
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Half-upright position. Refer for medical attention.
Skin MAY BE ABSORBED! Pain. Blisters. Serious skin burns.
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention.
Eyes Pain. Redness. Severe deep burns. Blurred 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 Sore throat. Burning sensation. Abdominal pain. Abdominal cramps. Vomiting. Diarrhoea.
Do not eat, drink, or smoke during work.
Rinse mouth. Do NOT induce vomiting. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Collect leaking liquid in sealable containers. Cautiously neutralize spilled liquid with weak alkaline solution (e.g., disodium carbonate). Then wash away with plenty of water. Do NOT let this chemical enter the environment (extra personal protection: complete protective clothing including self-contained breathing apparatus).
Do not transport with food and feedstuffs.
EU Classification
Symbol: C
R: 35
S: (1/2-)23-26-45
Note: B
UN Classification
UN Hazard Class: 8
UN Pack Group: II
EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-89 NFPA Code: H3; F2; R0;
Separated from strong oxidants, strong bases, strong acids, and food and feedstuffs. Well closed. Keep in a well-ventilated room.
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 2001

SEE IMPORTANT INFORMATION ON BACK


FORMIC ACID ICSC: 0485
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
COLOURLESS, FUMING LIQUID , WITH PUNGENT ODOUR.

CHEMICAL DANGERS:
The substance decomposes on heating and on contact with strong acids (sulfuric acid) producing carbon monoxide. The substance is a medium strong acid. Reacts violently with oxidants. Reacts violently with strong bases causing fire and explosion hazard. Attacks many plastics and metals.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 5 ppm; 9.4 mg/m^3 (as TWA); 10 ppm; 19 mg/m^3 (as STEL) (ACGIH 1996). MAK: 5 ppm; 9 mg/m^3; (1995).
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its vapour, through the skin and by ingestion.

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

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is very corrosive to the eyes, the skin and the respiratory tract. Corrosive on ingestion. Inhalation of the vapour may cause lung oedema (see Notes). The substance may cause effects on the energy metabolism , resulting in acidosis.

PHYSICAL PROPERTIES
Boiling point: 101C
Melting point: 8C
Relative density (water = 1): 1.2
Solubility in water: miscible
Vapour pressure, kPa at 20C: 4.6
Relative vapour density (air = 1): 1.6
Relative density of the vapour/air-mixture at 20C (air = 1): 1.03
Flash point: 69C
Auto-ignition temperature: 520C
Explosive limits, vol% in air: 18-51
Octanol/water partition coefficient as log Pow: -0.54
ENVIRONMENTAL DATA
The substance is harmful to aquatic organisms.
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 spray, by a doctor or a person authorized by him/her, should be considered. The odour warning when the exposure limit value is exceeded is insufficient.
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 2001

See Also:
        Formic acid (CHEMINFO)