International Chemical Safety Cards

BENZIDINE ICSC: 0224
BENZIDINE
(1,1'-Biphenyl)-4,4'-diamine
4,4'-Diaminobiphenyl
p-Diaminodiphenyl
C12H12N2/NH2C6H4-C6H4NH2
Molecular mass: 184.2
CAS # 92-87-5
RTECS # DC9625000
ICSC # 0224
UN # 1885
EC # 612-042-00-2

TYPES OF
HAZARD/
EXPOSURE
ACUTE HAZARDS/
SYMPTOMS
PREVENTION FIRST AID/
FIRE FIGHTING
FIRE Combustible. See Notes. Gives off irritating or toxic fumes (or gases) in a fire.
NO open flames.
Powder, carbon dioxide.
EXPLOSION


EXPOSURE
AVOID ALL CONTACT!
IN ALL CASES CONSULT A DOCTOR!
  • INHALATION

  • Closed system and ventilation.
    Fresh air, rest. Refer for medical attention.
  • SKIN
  • MAY BE ABSORBED!
    Protective gloves. Protective clothing.
    Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention.
  • EYES

  • Face shield or eye protection in combination with breathing protection if powder.
    First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
  • INGESTION

  • Do not eat, drink, or smoke during work. Wash hands before eating.
    Rinse mouth. Give a slurry of activated charcoal in water to drink. Induce vomiting (ONLY IN CONSCIOUS PERSONS!). Refer for medical attention.
    SPILLAGE DISPOSAL STORAGE PACKAGING & LABELLING
    Evacuate danger area! Consult an expert! Sweep spilled substance into sealable containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place. Do NOT let this chemical enter the environment (extra personal protection: complete protective clothing including self-contained breathing apparatus).
    Separated from strong oxidants, food and feedstuffs. Keep in the dark. Well closed.
    Unbreakable packaging; put breakable packaging into closed unbreakable container. Do not transport with food and feedstuffs.
    T symbol
    R: 45-22
    S: 53-45
    Note: E
    UN Hazard Class: 6.1
    UN Packing Group: II
    SEE IMPORTANT INFORMATION ON BACK
    ICSC: 0224 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities © IPCS CEC 1993

    International Chemical Safety Cards

    BENZIDINE ICSC: 0224

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    PHYSICAL STATE; APPEARANCE:
    WHITE OR REDDISH CRYSTALLINE POWDER, TURNS DARK ON EXPOSURE TO AIR AND LIGHT.

    PHYSICAL DANGERS:


    CHEMICAL DANGERS:
    The substance decomposes on heating and on burning producing toxic fumes including nitrogen oxides. Reacts violently with strong oxidants, especially nitric acid.

    OCCUPATIONAL EXPOSURE LIMITS (OELs):
    TLV: ppm; mg/m3 A1 (confirmed human carcinogen) (ACGIH 1994-1995).


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

    EFFECTS OF SHORT-TERM EXPOSURE:


    EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
    This substance is carcinogenic to humans.
    PHYSICAL
    PROPERTIES
    Boiling point: 401C
    Melting point: 128C (see Notes)C
    Relative density (water = 1): 1.25
    Solubility in water: none
    Relative vapour density (air = 1): 6.36
    Octanol/water partition coefficient as log Pow: 1.34
    ENVIRONMENTAL
    DATA
    The substance is toxic to aquatic organisms.
    N O T E S
    Given melting point when anhydrous and rapidly heated, when slowly heated: 115-120C. Addition of small amounts of a flammable substance or an increase in the oxygen content of the air strongly enhances combustibility.
    Transport Emergency Card: TEC (R)-61G11b
    ADDITIONAL INFORMATION


    ICSC: 0224 BENZIDINE
    © IPCS, CEC, 1993
    IMPORTANT LEGAL NOTICE: Neither the CEC or 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. 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.