ICSC:NENG1110 International Chemical Safety Cards (WHO/IPCS/ILO)

Methyl chlorocarbonate
Carbonochloridic acid, methyl ester
chloroformic acid methyl ester
Methoxycarbonyl chloride
C₂H₃ClO₂ / CH₃OCOCl
Molecular mass: 94.50

ICSC #    1110
CAS #     79-22-1
RTECS # FG3675000
UN #        1238
EC #         607-019-00-9

Types of Hazard/ Exposure	Acute Hazards/ Symptoms	Prevention	First Aid/ Fire Fighting
FIRE	Highly flammable. Gives off irritating or toxic fumes (or gases) in a fire.	NO open flames, NO sparks, and NO smoking.	Shut off supply; if not possible and no risk to surroundings, let the fire burn itself out; in other cases extinguish with foam, powder, carbon dioxide, dry sand.
Explosion	Vapour/air mixtures are explosive.	Closed system, ventilation, explosion-proof electrical equipment and lighting. Do NOT use compressed air for filling, discharging, or handling.	In case of fire: cool drums, etc., by spraying with water but avoid contact of the substance with water.

Exposure		STRICT HYGIENE!	IN ALL CASES CONSULT A DOCTOR!
•Inhalation	Burning sensation. Cough. Laboured breathing. Shortness of breath. Sore throat. Symptoms may be delayed (see Notes).	Ventilation, local exhaust, or breathing protection.	Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer for medical attention.
•Skin	Redness. Skin burns. Pain. Blisters.	Protective gloves. Protective clothing.	Remove contaminated clothes. Rinse and then wash skin with water and soap. Refer for medical attention.
•Eyes	Redness. Pain. Loss of vision. Severe deep burns.	Safety goggles, 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. Shock or collapse.	Do not eat, drink, or smoke during work. Wash hands before eating.	Rinse mouth. Do NOT induce vomiting. Refer for medical attention.

Spillage Disposal

Storage

Packaging & Labelling

Evacuate danger area! Consult an expert! Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in dry sand or inert absorbent and remove to safe place. Do NOT wash away into sewer. Do NOT let this chemical enter the environment. Personal protection: chemical protection suit including self-contained breathing apparatus.

Fireproof. Provision to contain effluent from fire extinguishing. Separated from strong oxidants, food and feedstuffs . Dry. Well closed. Keep in a well-ventilated room.

Do not transport with food and feedstuffs.
F symbol
T+ symbol
R: 11-21/22-26-34
S: 1/2-14-26-28-36/37-39-45-46-63
UN Hazard Class: 6.1
UN Subsidiary Risks: 3, 8
UN Packing Group: I

Important Data

Physical State; Appearance:
COLOURLESS LIQUID , WITH PUNGENT ODOUR.

Physical Dangers:
The vapour is heavier than air and may travel along the ground; distant ignition possible.

Chemical Dangers:
The substance decomposes on heating or on burning producing toxic and corrosive fumes including hydrogen chloride and phosgene . Reacts violently with strong oxidants. Reacts gradually with water, forming hydrogen chloride. Attacks many metals in presence of water.

Occupational Exposure Limits:
TLV not established.
MAK: 0.2 ppm, 0.78 mg/m³
Peak limitation category: I(2); Pregnancy risk group: C;
(DFG 2004).

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 very quickly on evaporation of this substance at 20°C.

Effects of Short-Term Exposure:
Tear drawing. The substance is corrosive to the eyes, the skin, the respiratory tract. Corrosive on ingestion. Inhalation of vapour may cause lung oedema (see Notes).

Effects of Long-Term or Repeated Exposure:

Physical
Properties

Boiling point: 71°C
Melting point: -61°C
Relative density (water = 1): 1.22
Solubility in water:
poor
Vapour pressure, kPa at 20°C: 14

Relative vapour density (air = 1): 3.3
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.3
Flash point: 12°C
Auto-ignition temperature: 504°C
Explosive limits, vol% in air: 6.7-?

Environmental
Data

The substance is toxic 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. Card has been partly updated in October 2004. See sections Occupational Exposure Limits, EU classification, Emergency Response.

Transport Emergency Card: TEC (R)-61GTFC-I

ADDITIONAL INFORMATION

ICSC: 1110	METHYL CHLOROFORMATE
(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.