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1,3-DICHLORO-2-BUTENE
ICSC: 1761
Peer-Review Status: 05.05.2010 Validated
2-butene,1,3-dichloro-
1,3-dichlorobutylene
1,3-DCB 
CAS #: 926-57-8 RTECS #: EM4760000
UN #: 1993
EINECS #: 213-138-3
    Formula: C4H6Cl2
Molecular mass: 125.0

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.  Use fine water spray, carbon dioxide. 
EXPLOSION Above 27°C explosive vapour/air mixtures may be formed.  Above 27°C use a closed system and ventilation.  In case of fire: keep drums, etc., cool by spraying with water. 
 
EXPOSURE   STRICT HYGIENE!   
Inhalation Cough. Sore throat.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. 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 immediately for medical attention. 
Eyes Redness. Pain.  Wear face shield or eye protection in combination with breathing protection.  Rinse with plenty of water (remove contact lenses if easily possible). Refer immediately for medical attention. 
Ingestion Cough. Burning sensation in the throat and chest.  Do not eat, drink, or smoke during work.  Rinse mouth. Do NOT induce vomiting. Give one or two glasses of water to drink. Refer immediately for medical attention. 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Personal protection: complete protective clothing including self-contained breathing apparatus. Do NOT let this chemical enter the environment. Collect leaking liquid in sealable containers. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations.   
EC Classification
 
UN Classification
UN Hazard Class: 3; UN Pack Group: III 
GHS Classification
Signal: Danger
Flammable liquid and vapour
Toxic if swallowed
Toxic if inhaled vapour
Causes severe skin burns and eye damage
Toxic to aquatic life 
flam;flamecorrskull;toxic

EMERGENCY RESPONSE SAFE STORAGE
NFPA Code: H3; F3; R2.  Fireproof. Ventilation along the floor. Well closed. Separated from strong oxidants and food and feedstuffs. Store in an area without drain or sewer access. Provision to contain effluent from fire extinguishing. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS-TO-YELLOW LIQUID WITH CHARACTERISTIC ODOUR. 

Physical dangers
No data. 

Chemical dangers
Decomposes on heating. This produces hydrogen chloride. 

Occupational exposure limits
TLV not established.
MAK (not established):. 

Routes of exposure
The substance can be absorbed into the body in hazardous amounts by inhalation of its vapour, through the skin and by ingestion. Serious local effects by all routes of exposure. 

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
The vapour is irritating to the respiratory tract and eyes. The substance is severely irritating to the eyes. The substance is corrosive to the skin. 

Effects of long-term or repeated exposure
Repeated or prolonged inhalation of high concentrations may cause effects on the lungs. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 126°C
Melting point: -75°C
Relative density (water = 1): 1.2
Solubility in water: reaction
Vapour pressure, kPa at 25°C: 1.33
Relative vapour density (air = 1): 4.3
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.07
Flash point: 27°C c.c.
Explosive limits, vol% in air: 2-13
Octanol/water partition coefficient as log Pow: 2.84  
The substance is toxic to aquatic organisms. It is strongly advised not to let the chemical enter into the environment. 

NOTES
See also ICSC 0995 (1,3-Dichloropropene (mixed isomers)). 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
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.


    See Also:
       Toxicological Abbreviations