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SODIUM CHROMATE ICSC: 1370
Date of Peer Review: April 2005

Disodium chromate (VI)
Chromic acid, disodium salt
Disodium chromium tetraoxide
CAS # 7775-11-3 Na2CrO4
RTECS # GB2955000 Molecular mass: 162
UN # 3288
EC # 024-018-00-3
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Not combustible but enhances combustion of other substances.
NO contact with flammable substances.
In case of fire in the surroundings: water in large amounts.
EXPLOSION


EXPOSURE
PREVENT DISPERSION OF DUST! AVOID ALL CONTACT!
IN ALL CASES CONSULT A DOCTOR!
Inhalation Burning sensation. Sore throat. Cough. Wheezing. Laboured breathing.
Closed system and ventilation.
Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer for medical attention.
Skin Redness. Pain. Skin burns.
Protective gloves. Protective clothing.
First rinse with plenty of water, then remove contaminated clothes and rinse again. Refer for medical attention.
Eyes Redness. Pain. Blurred vision. Severe deep burns.
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 Nausea. Vomiting. Abdominal pain. Burning sensation. Diarrhoea. Shock or collapse.
Do not eat, drink, or smoke during work. Wash hands before eating.
Rinse mouth. Give plenty of water to drink. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Personal protection: complete protective clothing including self-contained breathing apparatus. Sweep spilled substance into containers; if appropriate, moisten first to prevent dusting. Carefully collect remainder, then remove to safe place. Do NOT let this chemical enter the environment.
Do not transport with food and feedstuffs.
EU Classification
Symbol: T+, N
R: 45-46-60-61-21-25-26-34-42/43-48/23-50/53
S: 53-45-60-61
Note: [E, 3]
UN Classification
UN Hazard Class: 6.1
UN Pack Group: III
EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-61GT5-III
Dry. Separated from combustible and reducing substances, food and feedstuffs. Store in an area without drain or sewer access.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 1999

SEE IMPORTANT INFORMATION ON BACK
SODIUM CHROMATE ICSC: 1370
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
YELLOW HYGROSCOPIC CRYSTALS

CHEMICAL DANGERS:
The solution in water is a weak base. The substance is a strong oxidant and reacts with combustible and reducing materials.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: (as Cr) 0.05 mg/m as TWA; A1 (confirmed human carcinogen); BEI issued; (ACGIH 2005).
MAK: (Inhalable fraction); sensitization of skin (Sh); Carcinogen category: 2; (DFG 2004).
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its aerosol, through the skin and by ingestion.

INHALATION RISK:
A harmful concentration of airborne particles can be reached quickly when dispersed.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is corrosive to the eyes, the skin and the respiratory tract. Corrosive on ingestion. The substance may cause effects on the kidneys and liver, resulting in tissue lesions.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Repeated or prolonged contact may cause skin sensitization. Repeated or prolonged inhalation exposure may cause asthma. The substance may have effects on the respiratory tract and kidneys, resulting in nasal septum perforation and 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
Melting point: 762C
Density: 2.7 g/cm
Solubility in water, g/100 ml at 20C: 53
ENVIRONMENTAL DATA
The substance is very toxic to aquatic organisms. The substance may cause long-term effects in the aquatic environment.
NOTES
Do NOT take working clothes home. Rinse contaminated clothes (fire hazard) with plenty of water. Anyone who has shown symptoms of asthma due to this substance should avoid all further contact. 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. The recommendations on this Card also apply to sodium chromate tetrahydrate (CAS No. 10034-82-9).
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor 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
IPCS, CEC 1999