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n-BUTYL CHLOROFORMATE ICSC: 1593
Date of Peer Review: October 2005

Butyl chlorocarbonate
Butyl chloroformate
Chloroformic acid butyl ester
Carbonochloridic acid, butyl ester
CAS # 592-34-7 C5H9ClO2 / CH3(CH2)3OCOCl
RTECS # Molecular mass: 136.6
UN # 2743
EC Index # 607-138-00-6
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Flammable. Gives off irritating or toxic fumes (or gases) in a fire.
NO open flames, NO sparks, and NO smoking.
NO water. Dry powder. Carbon dioxide. Alcohol-resistant foam.
EXPLOSION Above 30C explosive vapour/air mixtures may be formed.
Above 30C use a closed system, ventilation, and explosion-proof electrical equipment.
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 Sore throat. Burning sensation. Cough. Laboured breathing. Shortness of breath. 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. Pain. Skin burns.
Protective gloves. Protective clothing.
Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention.
Eyes Redness. Pain. Severe deep burns.
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. Give plenty of water to drink. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Evacuate danger area! Consult an expert! Personal protection: chemical protection suit including self-contained breathing apparatus. Do NOT let this chemical enter the environment. Collect leaking liquid in sealable dry plastic containers. Absorb remaining liquid in dry sand or inert absorbent and remove to safe place.
Do not transport with food and feedstuffs. Unbreakable packaging; put breakable packaging into closed unbreakable container.
EU Classification
Symbol: T
R: 10-23-34
S: (1/2-)-26-36-45
UN Classification
UN Hazard Class: 6.1
UN Subsidiary Risks: 3 and 8
UN Pack Group: II
EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-61GTFC-II
Fireproof. Dry. Well closed. Provision to contain effluent from fire extinguishing. Separated from food and feedstuffs. Store in an area without drain or sewer access.
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 2005

SEE IMPORTANT INFORMATION ON BACK
n-BUTYL CHLOROFORMATE ICSC: 1593
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
COLOURLESS LIQUID, WITH PUNGENT ODOUR.

CHEMICAL DANGERS:
The substance decomposes on burning producing toxic and corrosive fumes. Reacts with water or moisture producing hydrogen chloride.

OCCUPATIONAL EXPOSURE LIMITS:
TLV not established.
MAK: 0.2 ppm, 1.1 mg/m; Peak limitation category: I(2); Pregnancy risk group: C; (DFG 2005).
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 will be reached very quickly on evaporation of this substance at 20C.

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

PHYSICAL PROPERTIES
Boiling point: 138-145C
Melting point: <-70C
Density: 1.06 g/cm
Solubility in water: reaction
Vapour pressure, kPa at 20C: 0.72
Relative vapour density (air = 1): 4.72
Relative density of the vapour/air-mixture at 20C (air = 1): 1.02
Flash point: 30C c.c.
Auto-ignition temperature: 285C
Octanol/water partition coefficient as log Pow: 1.61 (calculated)
ENVIRONMENTAL DATA
The substance is toxic to aquatic organisms.
NOTES
Reacts violently with fire extinguishing agents such as water. 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.
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 2005