CHROMIUM(VI) OXIDE 1194
October 2004
Chromic trioxide
CAS No: 1333-82-0
Chromic acid
RTECS No: GB6650000
Chromic anhydride
UN No: 1463
CrO3
EC No: 024-001-00-0
Molecular mass: 100.0
TYPES OF
ACUTE HAZARDS/SYMPTOMS PREVENTION FIRST AID/FIRE FIGHTING
HAZARD/
EXPOSURE
Not combustible but enhances NO contact with combustible NO water. In case of fire in the
FIRE
combustion of other substances. substances and reducing agents. surroundings: use appropriate
Many reactions may cause fire or extinguishing media.
explosion.
EXPLOSION
EXPOSURE PREVENT DISPERSION OF DUST! IN ALL CASES CONSULT A
AVOID ALL CONTACT! DOCTOR!
Cough. Laboured breathing. Closed system and ventilation. Fresh air, rest. Half-upright position.
Inhalation
Shortness of breath. Sore throat. Artificial respiration may be needed.
Wheezing. Burning sensation. Refer for medical attention.
Symptoms may be delayed (see
Notes).
Redness. Skin burns. Pain. Protective gloves. Protective Remove contaminated clothes.
Skin
clothing. Rinse skin with plenty of water or
shower. Refer for medical attention.
Redness. Pain. Severe deep Safety goggles, or eye protection in First rinse with plenty of water for
Eyes
burns. combination with breathing several minutes (remove contact
protection. lenses if easily possible), then take
to a doctor.
Abdominal pain. Burning Do not eat, drink, or smoke during Rinse mouth. Do NOT induce
Ingestion
sensation. Shock or collapse. work. Wash hands before eating. vomiting. Refer for medical
attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Do NOT let this chemical enter the environment. O Symbol Do not transport with food and
Vacuum spilled material. OR Sweep spilled T+ Symbol feedstuffs.
substance into sealable containers; if appropriate, N Symbol
moisten first to prevent dusting. Carefully collect R: 45-46-9-24/25-26-35-42/43-
remainder, then remove to safe place. Do NOT 48/23-62-50/53
absorb in saw-dust or other combustible absorbents. S: 53-45-60-61
Personal protection: complete protective clothing Note: E
including self-contained breathing apparatus. UN Hazard Class: 5.1
UN Subsidiary Risks: 8
UN Pack Group: II
EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-51S1463 Separated from combustible and reducing substances, bases, food and
NFPA Code: H3; F0; R1; OX feedstuffs. Dry.
IPCS Prepared in the context of cooperation between the International
Programme on Chemical Safety and the European Commission 漏
International IPCS 2004
Programme on
Chemical Safety SEE IMPORTANT INFORMATION ON THE BACK.
1194 CHROMIUM(VI) OXIDE
IMPORTANT DATA
Physical State; Appearance Routes of exposure
ODOURLESS, DARK RED DELIQUESCENT CRYSTALS, The substance can be absorbed into the body by inhalation and
FLAKES OR GRANULAR POWDER. through the skin and by ingestion.
Chemical dangers Inhalation risk
The substance decomposes above 250/C to chromic oxide and Evaporation at 20/C is negligible; a harmful concentration of
oxygen, which increases fire hazard. The substance is a strong airborne particles can, however, be reached quickly when
oxidant and reacts violently with combustible and reducing dispersed, especially if powdered.
materials causing fire and explosion hazard. The solution in
water is a strong acid, it reacts violently with bases and is Effects of short-term exposure
corrosive. The substance is corrosive to the eyes, the skin and the
respiratory tract. Corrosive on ingestion.
Occupational exposure limits
TLV: (as chromium, water-soluble Cr (VI) compounds) 0.05 Effects of long-term or repeated exposure
mg/m3 as TWA; A1; BEI issued; (ACGIH 2004). Repeated or prolonged contact may cause skin sensitization.
MAK: Sh; Carcinogen category: 2; (DFG 2004). Repeated or prolonged inhalation exposure may cause asthma.
The substance may have effects on the respiratory tract,
kidneys, resulting in nasal septum perforation, kidney
impairment. This substance is carcinogenic to humans. May
cause heritable genetic damage to human germ cells. Animal
tests show that this substance possibly causes toxicity to human
reproduction or development.
PHYSICAL PROPERTIES
Density: 2.7 g/cm3
Decomposes below boiling point at 250/C
Melting point: 197/C Solubility in water: good
ENVIRONMENTAL DATA
The substance is very toxic to aquatic organisms. It is strongly advised that this substance does not enter the environment.
NOTES
Rinse contaminated clothes (fire hazard) with plenty of water.
The symptoms of asthma often do not become manifest until a few hours have passed and they are aggravated by physical effort.
Rest and medical observation are therefore essential.
Anyone who has shown symptoms of asthma due to this substance should avoid all further contact.
Do NOT take working clothes home.
Depending on the degree of exposure, periodic medical examination is suggested.
ADDITIONAL INFORMATION
Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible
LEGAL NOTICE
漏IPCS 2004
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