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3,3'-DICHLOROBENZIDINE
ICSC: 0481
Peer-Review Status: 05.05.2010 Validated
3,3'-Dichlorobiphenyl-4,4'-ylenediamine
4,4'-Diamino-3,3'-dichlorobiphenyl 
CAS #: 91-94-1 RTECS #: DD0525000
EC #: 612-068-00-4
EINECS #: 202-109-0
    Formula: C6H3ClNH2C6H3ClNH2/C12H10Cl2N2
Molecular mass: 253.1

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Combustible. Gives off irritating or toxic fumes (or gases) in a fire.  NO open flames.  Use fine water spray, dry powder, carbon dioxide. 
EXPLOSION      
 
EXPOSURE See EFFECTS OF LONG-TERM OR REPEATED EXPOSURE.  PREVENT DISPERSION OF DUST! STRICT HYGIENE!   
Inhalation Cough. Sore throat.  Avoid inhalation of dust. Use local exhaust or breathing protection.  Fresh air, rest. Seek medical attention if you feel unwell. 
Skin MAY BE ABSORBED!  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse and then wash skin with water and soap. Seek medical attention if you feel unwell. 
Eyes   Wear face shield or eye protection in combination with breathing protection if powder.  Rinse with plenty of water (remove contact lenses if easily possible). 
Ingestion   Do not eat, drink, or smoke during work.  Rinse mouth. Refer 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. Sweep spilled substance into sealable containers. If appropriate, moisten first to prevent dusting. Carefully collect remainder. Then store and dispose of according to local regulations.  Do not transport with food and feedstuffs. 
EC Classification
Symbol: T, N; R: 45-21-43-50/53; S: 53-45-60-61; Note: E 
UN Classification
 
GHS Classification
Signal: Danger
Suspected of causing genetic defects
May cause cancer
May cause respiratory irritation
May cause damage to liver through prolonged or repeated exposure if swallowed
Toxic to aquatic life with long lasting effects 
excl mark;warncancer;health hazenviro;aqua

EMERGENCY RESPONSE SAFE STORAGE
  Provision to contain effluent from fire extinguishing. Separated from food and feedstuffs. Well closed. Store only in original container. Store in an area without drain or sewer access. 

IMPORTANT DATA
Physical State; Appearance
GREY-TO-PURPLE CRYSTALS. 

Physical dangers
No data. 

Chemical dangers
Decomposes on burning. This produces toxic and corrosive fumes including nitrogen oxides and hydrogen chloride. 

Occupational exposure limits
TLV: (skin); A3 (confirmed animal carcinogen with unknown relevance to humans); (ACGIH 2009).
MAK: Carcinogen category: 2; Skin absorption (H); (DFG 2009). 

Routes of exposure
The substance can be absorbed into the body by inhalation of its aerosol, through the skin and by ingestion. 

Inhalation risk
Evaporation at 20°C is negligible; a harmful concentration of airborne particles can, however, be reached quickly when dispersed, especially if powdered. 

Effects of short-term exposure
The substance is irritating to the respiratory tract. 

Effects of long-term or repeated exposure
Repeated or prolonged contact with skin may cause dermatitis. The substance may have effects on the liver. This substance is probably carcinogenic to humans. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 368°C
Melting point: 132-133°C
Solubility in water: none
Auto-ignition temperature: 350°C
Octanol/water partition coefficient as log Pow: 3.51  
The substance is toxic to aquatic organisms. The substance may cause long-term effects in the aquatic environment. It is strongly advised not to let the chemical enter into the environment. 

NOTES
The substance is combustible but no flash point is available in literature.
Curithane C126 is a trade name. 

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