INTOX Home Page
LEAD CHROMATE ICSC: 0003
Date of Peer Review: October 2002

Plumbous chromate
Chromic acid, lead (II) salt (1:1)
CAS # 7758-97-6 PbCrO4
RTECS # GB2975000 Molecular mass: 323.2
UN # 3288
EC # 082-004-00-2
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.

In case of fire in the surroundings: all extinguishing agents allowed.
EXPLOSION


EXPOSURE
AVOID ALL CONTACT! PREVENT DISPERSION OF DUST! AVOID EXPOSURE OF (PREGNANT) WOMEN! AVOID EXPOSURE OF ADOLESCENTS AND CHILDREN!

Inhalation Cough. Headache. Nausea.
Local exhaust or breathing protection.
Fresh air, rest.
Skin See EFFECTS OF LONG-TERM OR REPEATED EXPOSURE.
Protective gloves. Protective clothing.
Rinse and then wash skin with water and soap.
Eyes Redness.
Safety goggles, 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 Abdominal pain. Nausea. Vomiting.
Do not eat, drink, or smoke during work.
Rinse mouth. Give plenty of water to drink.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Vacuum spilled material, or 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. (Extra personal protection: P3 filter respirator for toxic particles.)
Unbreakable packaging; put breakable packaging into closed unbreakable container. Marine pollutant.
EU Classification
Symbol: T, N
R: 61-33-40-50/53-62
S: 53-45-60-61
UN Classification
UN Hazard Class: 6.1
UN Pack Group: III
EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-61GT5-III
Separated from strong oxidants.
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


LEAD CHROMATE ICSC: 0003
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
YELLOW TO ORANGE-YELLOW CRYSTALLINE POWDER

CHEMICAL DANGERS:
The substance decomposes on heating producing toxic fumes including lead oxides. Reacts with strong oxidants such as hydrogen peroxide. Reacts with aluminium dinitronaphthalene, iron(III) hexacyanoferrate(IV). Reacts with organic compounds at elevated temperature causing fire hazard.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: as Pb 0.05 mg/m (as TWA); A2; (ACGIH 2002).
TLV: as Cr 0.012 mg/m (as TWA); A2; (ACGIH 2002).
MAK: Carcinogen category: 3B; (DFG 2002).
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its aerosol and dust, and by ingestion.

INHALATION RISK:
Evaporation at 20C is negligible; a harmful concentration of airborne particles can, however, be reached quickly on spraying or 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, and chronic ulcers. Repeated or prolonged contact may cause skin sensitization. Repeated or prolonged inhalation exposure may cause asthma. Lungs may be affected by repeated or prolonged exposure. The substance may have effects on the blood, bone marrow, central nervous system, peripheral nervous system and kidneys, resulting in anaemia, encephalopathy (e.g., convulsions), peripheral nerve disease, abdominal cramps and kidney impairment. This substance is possibly carcinogenic to humans. May cause toxicity to human reproduction or development.
PHYSICAL PROPERTIES
Boiling point (decomposes): not available
Melting point: 844C
Density: 6.3 g/cm^3
Solubility in water, g/100 ml at 25C: 0.0000058
ENVIRONMENTAL DATA
Bioaccumulation of this chemical may occur along the food chain, for example in fish, in plants, in mammals.
NOTES
Chromates are classified as human carcinogens, but evidence for this substance is limited. Lead chromate pigments may contain appreciable quantities of water-soluble lead compounds. Toxic fumes (lead and chromium compounds) are also liberated during welding, cutting and heating of material treated with lead chromate. Depending on the degree of exposure, periodic medical examination is indicated. Do NOT take working clothes home. Lead chromate occurs in nature as the minerals crocoite, phoenicochroite. Chrome yellow, Cologne yellow, King's yellow, Leipzig yellow, Paris yellow, C.I. Pigment yellow 34, C.I. 77600 are trade names.
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