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ISOBUTYL CHLOROFORMATE ICSC: 1594
October 2005
Isobutyl chlorocarbonate
2-Methylpropyl chloroformate
Formic acid, chloro-, isobutyl ester
Carbonochloridic acid, 2-methylpropyl ester
PDF for printing Explanation of fields
CAS No: 543-27-1
UN No: 2742
    C5H9ClO2 / (CH3)2CHCH2OCOCl
Molecular mass: 136.6

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 27°C explosive vapour/air mixtures may be formed. Above 27°C 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. UN Hazard Class: 6.1
UN Subsidiary Risks: 3 and 8
UN Pack Group: II

Do not transport with food and feedstuffs. Unbreakable packaging; put breakable packaging into closed unbreakable container.


EMERGENCY RESPONSE SAFE 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.

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/m³; 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 20°C.

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 ENVIRONMENTAL DATA
Boiling point: 129°C
Density: 1.04 g/cm³
Solubility in water: reaction
Vapour pressure, kPa at 20°C: 2.2
Relative vapour density (air = 1): 4.71
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.04
Flash point: 27°C c.c.
Octanol/water partition coefficient as log Pow: 1.54 (calculated)
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.

IPCS
International
Programme on
Chemical Safety
WHO ILO UNEP EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.

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