International Chemical Safety Cards

CHROMIUM (VI) OXIDE ICSC: 1194
CHROMIUM (VI) OXIDE
Chromic trioxide
Chromic acid
Chromic anhydride
CrO3
Molecular mass: 100.01
CAS # 1333-82-0
RTECS # GB6650000
ICSC # 1194
UN # 1463 (anhydrous)
EC # 024-001-00-0
TYPES OF
HAZARD/
EXPOSURE
ACUTE HAZARDS/
SYMPTOMS
PREVENTION FIRST AID/
FIRE FIGHTING
FIRE Not combustible but enhances combustion of other substances. Many reactions may cause fire or explosion.
NO contact with combustible substances and reducing agents.
Powder, water spray, foam, carbon dioxide.
EXPLOSION

In case of fire: keep drums, etc., cool by spraying with water.
EXPOSURE
PREVENT DISPERSION OF DUST! AVOID ALL CONTACT!
IN ALL CASES CONSULT A DOCTOR!
  • INHALATION
  • Cough. Laboured breathing. Shortness of breath. Sore throat. Wheezing.
    Avoid inhalation of fine dust and mist. Ventilation (not if powder), local exhaust, or breathing protection.
    Fresh air, rest. Half-upright position. Artificial respiration if indicated. Refer for medical attention.
  • SKIN
  • Redness. Skin burns. Pain.
    Protective gloves. Protective clothing.
    Remove contaminated clothes. Rinse skin with plenty of water or shower.
  • EYES
  • Redness. Pain. Permanent loss of vision. Severe deep burns.
    Safety spectacles, 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 cramps.
    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 STORAGE PACKAGING & LABELLING
    Do NOT wash away into sewer. Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place. Do NOT absorb in saw-dust or other combustible absorbents (extra personal protection: complete protective clothing including self-contained breathing apparatus).
    Separated from combustible and reducing substances, food and feedstuffs, bases. Dry.
    Do not transport with food and feedstuffs.
    O symbol
    T symbol
    R: 49-8-25-35-43
    S: 53-45
    Note: E
    UN Hazard Class: 5.1
    UN Subsidiary Risks: 8
    UN Packing Group: II
    SEE IMPORTANT INFORMATION ON BACK
    ICSC: 1194 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

    CHROMIUM (VI) OXIDE ICSC: 1194

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    PHYSICAL STATE; APPEARANCE:
    ODOURLESS, DARK RED DELIQUESCENT CRYSTALS, FLAKES, OR GRANULAR POWDER.

    PHYSICAL DANGERS:


    CHEMICAL DANGERS:
    The substance decomposes above 250C to chromic oxide and oxygen with increased fire hazard. The substance is a strong oxidant. Reacts violently with combustible substances and reducing agents causing fire and explosion hazard. In aqueous solution, is a strong acid which reacts with bases and is corrosive.

    OCCUPATIONAL EXPOSURE LIMITS (OELs):
    TLV (as Cr): ppm; 0.05 mg/m3 (ACGIH 1993-1994).


    ROUTES OF EXPOSURE:
    The substance can be absorbed into the body by inhalation and 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:
    The substance irritates the eyes, the skin and the respiratory tract.

    EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
    Repeated or prolonged contact with skin may cause dermatitis and chrome ulcers. Repeated or prolonged contact may cause skin sensitization. Repeated or prolonged inhalation exposure may cause asthma-like reactions. See notes. The substance may have effects on the nasal septum , resulting in perforation. This substance is probably carcinogenic to humans.
    PHYSICAL
    PROPERTIES
    Decomposes below boiling point at 250C
    Melting point: 197C
    Relative density (water = 1): 2.70
    Solubility in water: good
    ENVIRONMENTAL
    DATA
    This substance may be hazardous to the environment; special attention should be given to fish and crustacea. The substance may cause long-term effects in the aquatic environment.
    N O T E S
    Rinse contaminated clothes (fire hazard) with plenty of water.
    Transport Emergency Card: TEC (R)-866
    NFPA Code: H3; F0; R1; OX
    ADDITIONAL INFORMATION


    ICSC: 1194 CHROMIUM (VI) OXIDE
    © 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.