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0 LEAD CHROMATE
ICSC: 0003
Peer-Review Status: 10.07.2002 Validated
Plumbous chromate
Chromic acid, lead (II) salt (1:1) 
CAS #: 7758-97-6 RTECS #: GB2975000
UN #: 3288
EC #: 082-004-00-2
EINECS #: 231-846-0
    Formula: PbCrO4
Molecular mass: 323.2

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, use appropriate extinguishing media. 
EXPLOSION      
 
EXPOSURE   AVOID ALL CONTACT! PREVENT DISPERSION OF DUST! AVOID EXPOSURE OF (PREGNANT) WOMEN! AVOID EXPOSURE OF ADOLESCENTS AND CHILDREN!   
Inhalation Cough. Headache. Nausea.  Use 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.  Wear 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 refer for medical attention. 
Ingestion Abdominal pain. Nausea. Vomiting.  Do not eat, drink, or smoke during work.  Rinse mouth. Give one or two glasses of water to drink. 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Vacuum spilled material with specialist equipment. If appropriate, moisten first to prevent dusting. Carefully collect remainder. Then store and dispose of according to local regulations.  Unbreakable packaging.
Put breakable packaging into closed unbreakable container.
Marine pollutant. 
EC 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 
GHS Classification
 

EMERGENCY RESPONSE SAFE STORAGE
Transport Emergency Card: TEC (R)-61GT5-III.  Separated from strong oxidants. 

IMPORTANT DATA
Physical State; Appearance
YELLOW-TO-ORANGE-YELLOW CRYSTALLINE POWDER. 

Physical dangers
 

Chemical dangers
Decomposes on heating. This produces toxic fumes including lead oxides. Reacts with strong oxidants such as hydrogen peroxide. Reacts with aluminium dinitronaphthalene and iron(III) hexacyanoferrate(IV). Reacts with organic compounds at elevated temperature. This generates fire hazard. 

Occupational exposure limits
TLV (as Pb): 0.05mg/m³ as TWA; A2 (suspected human carcinogen); BEI issued; (ACGIH 2004).
TLV (as Cr): 0.012mg/m³ as TWA; A2 (suspected human carcinogen); (ACGIH 2004).
MAK: Carcinogen category: 3B; (DFG 2004). 

Routes of exposure
The substance can be absorbed into the body by inhalation of its aerosol and by ingestion. 

Inhalation risk
Evaporation at 20°C 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 may cause asthma. Repeated or prolonged inhalation may cause effects on the lungs. The substance may have effects on the blood, bone marrow, central nervous system, peripheral nervous system and kidneys. This may result in anaemia, encephalopathy (for example; 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 ENVIRONMENTAL DATA
Decomposes
Melting point: 844°C
Density: 6.3 g/cm³
Solubility in water, g/100ml at 25°C: 0.0000058  
Bioaccumulation of this chemical may occur along the food chain, for example in fish, plants and 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.
Card has been partly updated in October 2004.
See sections Occupational Exposure Limits, EU classification, Emergency Response. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
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    See Also:
       Toxicological Abbreviations