ICSC 0003 - LEAD CHROMATE

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LEAD CHROMATE

ICSC: 0003
_{October 2002}

Plumbous chromate
Chromic acid, lead (II) salt (1:1)

CAS No: 7758-97-6
RTECS No: GB2975000
UN No: 3288
EC No: 082-004-00-2

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: 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.	T Symbol N Symbol R: 61-33-40-50/53-62 S: 53-45-60-61 UN Hazard Class: 6.1 UN Pack Group: III	Unbreakable packaging; put breakable packaging into closed unbreakable container. Marine pollutant.

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

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/m³ (as TWA); A2; BEI issued; (ACGIH 2002).
TLV: as Cr 0.012 mg/m³ (as TWA); A2; (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 dust, 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 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	ENVIRONMENTAL DATA
Boiling point (decomposes): not available Melting point: 844°C Density: 6.3 g/cm³ Solubility in water, g/100 ml at 25°C: 0.0000058	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.
Card has been partly updated in October 2004. See sections Occupational Exposure Limits, EU classification, Emergency Response.

IPCS
International
Programme on
Chemical Safety

Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004

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