METHYL ISOCYANATE 0004
November 2003
Isocyanatomethane
CAS No: 624-83-9
Isocyanic acid, methyl ester
RTECS No: NQ9450000
CH3NCO
UN No: 2480
Molecular mass: 57.1
EC No: 615-001-00-7
TYPES OF
ACUTE HAZARDS/SYMPTOMS PREVENTION FIRST AID/FIRE FIGHTING
HAZARD/
EXPOSURE
Extremely flammable. Many NO open flames, NO sparks, and Alcohol-resistant foam, dry sand,
FIRE
reactions may cause fire or NO smoking. NO contact with water, powder, carbon dioxide. NO
explosion. Gives off irritating or acid(s), base(s), oxidants. hydrous agents.
toxic fumes (or gases) in a fire.
Vapour/air mixtures are explosive. Closed system, ventilation, In case of fire: cool drums, etc., by
EXPLOSION
explosion-proof electrical equipment spraying with water but avoid
and lighting. Do NOT use contact of the substance with water.
compressed air for filling, Combat fire from a sheltered
discharging, or handling. position.
EXPOSURE AVOID ALL CONTACT! AVOID IN ALL CASES CONSULT A
EXPOSURE OF (PREGNANT) DOCTOR!
WOMEN!
Cough. Laboured breathing. Ventilation, local exhaust, or Fresh air, rest. Half-upright position.
Inhalation
Shortness of breath. Sore throat. breathing protection. Artificial respiration may be needed.
Vomiting. Refer for medical attention.
MAY BE ABSORBED! Redness. Protective gloves. Protective Remove contaminated clothes.
Skin
Pain. Burning sensation. clothing. Rinse skin with plenty of water or
shower. Refer for medical attention.
Pain. Redness. Loss of vision. Face shield, or eye protection in First rinse with plenty of water for
Eyes
combination with breathing several minutes (remove contact
protection. lenses if easily possible), then take
to a doctor.
Abdominal pain. Burning Do not eat, drink, or smoke during Rinse mouth. Do NOT induce
Ingestion
sensation. Shock or collapse. work. Wash hands before eating. vomiting. Give plenty of water to
drink. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Evacuate danger area! Consult an expert! F+ Symbol Special material.
Ventilation. Remove all ignition sources. Collect T+ Symbol
leaking liquid in sealable containers. Cautiously R: 12-24/25-26-37/38-41-42/43-63
neutralize spilled liquid with caustic soda. Absorb S: (1/2-)26-27/28-36/37/39-45-63
remaining liquid in dry sand or inert absorbent and UN Hazard Class: 6.1
remove to safe place. Chemical protection suit UN Subsidiary Risks: 3
including self-contained breathing apparatus. Do UN Pack Group: I
NOT let this chemical enter the environment.
EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-61S2480 Fireproof. See Chemical Dangers. Cool. Dry. Store only if stabilized.
NFPA Code: H4; F3; R2; W
IPCS Prepared in the context of cooperation between the International
Programme on Chemical Safety and the European Commission 漏
International IPCS 2004
Programme on
Chemical Safety SEE IMPORTANT INFORMATION ON THE BACK.
0004 METHYL ISOCYANATE
IMPORTANT DATA
Physical State; Appearance Routes of exposure
VOLATILE COLOURLESS LIQUID, WITH PUNGENT ODOUR. The substance can be absorbed into the body by inhalation,
through the skin and by ingestion.
Physical dangers
Inhalation risk
The vapour is heavier than air and may travel along the ground;
distant ignition possible. The vapour mixes well with air, A harmful contamination of the air can be reached very quickly
explosive mixtures are easily formed. on evaporation of this substance at 20/C.
Chemical dangers Effects of short-term exposure
The substance will polymerize when pure. The substance may The substance is severely irritating to the eyes, the skin and the
polymerize due to heating and under the influence of metals and respiratory tract. Corrosive on ingestion. Inhalation of the vapour
catalysts. The substance decomposes on contact with water. may cause lung oedema (see Notes). Inhalation of may cause
The substance decomposes rapidly on contact with acids and asthma-like reactions. Exposure may result in death. The effects
bases producing toxic gases (hydrogen cyanide, nitrogen may be delayed. Medical observation is indicated.
oxides, carbon monoxide). Attacks some forms of plastic, rubber
and coatings. Effects of long-term or repeated exposure
Repeated or prolonged contact may cause skin sensitization.
Occupational exposure limits The substance may have effects on the respiratory tract.
TLV: 0.02 ppm, 0.05 mg/m3; (skin); (ACGIH 2003). Causes toxicity to human reproduction or development.
MAK: 0.01 ppm, 0.024 mg/m3; Sh; Peak limitation category: I(1);
Pregnancy risk group: D; (DFG 2003).
PHYSICAL PROPERTIES
Boiling point: 39/C Relative vapour density (air = 1): 2
Melting point: -80/C Relative density of the vapour/air-mixture at 20/C (air = 1): 1.44
Relative density (water = 1): 0.96 Flash point: -7/C c.c.
Solubility in water, g/100 ml at 20/C: reaction Auto-ignition temperature: 535/C
Vapour pressure, kPa at 20/C: 54 Explosive limits, vol% in air: 5.3-26
ENVIRONMENTAL DATA
This substance may be hazardous in the environment; special attention should be given to aquatic organisms.
NOTES
Reacts violently with fire extinguishing agents such as water and hydrated agents.
Depending on the degree of exposure, periodic medical examination is suggested.
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.
Anyone who has shown symptoms of asthma due to this substance should avoid all further contact.
The symptoms of asthma 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.
The odour warning when the exposure limit value is exceeded is insufficient.
Do NOT take working clothes home.
Card has been partly updated in October 2004. See sections Occupational Exposure Limits, EU classification, Emergency
Response.
ADDITIONAL INFORMATION
Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible
LEGAL NOTICE
漏IPCS 2004
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