ICSC 0003 - LEAD CHROMATE

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LEAD CHROMATE	ICSC: 0003 (June 2012)
Plumbous chromate Chromic acid, lead (II) salt (1:1)

CAS #: 7758-97-6

UN #: 2291

EC Number: 231-846-0

	ACUTE HAZARDS	PREVENTION	FIRE FIGHTING
FIRE & EXPLOSION	Not combustible. Gives off irritating or toxic fumes (or gases) in a fire. Risk of fire and explosion on contact with incompatible substances. See Chemical Dangers.	NO contact with incompatible materials: See Chemical Dangers	In case of fire in the surroundings, use appropriate extinguishing media.

PREVENT DISPERSION OF DUST! AVOID ALL CONTACT!
	SYMPTOMS	PREVENTION	FIRST AID
Inhalation	Cough.	Use local exhaust or breathing protection.	Fresh air, rest.
Skin		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.	Rinse with plenty of water (remove contact lenses if easily possible).
Ingestion	See Effects of short-term exposure	Do not eat, drink, or smoke during work.	Rinse mouth. Give one or two glasses of water to drink.

SPILLAGE DISPOSAL	CLASSIFICATION & 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.	According to UN GHS Criteria May cause cancer May damage fertility or the unborn child if inhaled May cause damage to organs through prolonged or repeated exposure Very toxic to aquatic life with long lasting effects Transportation UN Classification UN Hazard Class: 6.1; UN Pack Group: III
STORAGE
Separated from food and feedstuffs and incompatible materials. See Chemical Dangers. Store in an area without drain or sewer access. Provision to contain effluent from fire extinguishing.
PACKAGING
Unbreakable packaging. Put breakable packaging into closed unbreakable container. Do not transport with food and feedstuffs.

LEAD CHROMATE

ICSC: 0003

PHYSICAL & CHEMICAL INFORMATION
Physical State; Appearance YELLOW-TO-ORANGE-YELLOW CRYSTALLINE POWDER. Physical dangers Chemical dangers Decomposes on heating. This produces toxic fumes including lead oxides. Reacts violently with many substances such as combustible substances, amines, bases and metals. This generates fire and explosion hazard.	Formula: PbCrO₄ Molecular mass: 323.2 Boiling point: not available (decomposes when heated) Melting point: 844°C Density: 6.3 g/cm³ Solubility in water at 25°C: none

PHYSICAL & CHEMICAL INFORMATION

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

Physical dangers

Chemical dangers
Decomposes on heating. This produces toxic fumes including lead oxides. Reacts violently with many substances such as combustible substances, amines, bases and metals. This generates fire and explosion hazard.

Formula: PbCrO₄
Molecular mass: 323.2
Boiling point: not available (decomposes when heated)
Melting point: 844°C
Density: 6.3 g/cm³
Solubility in water at 25°C: none

EXPOSURE & HEALTH EFFECTS
Routes of exposure The substance can be absorbed into the body by inhalation of dust and by ingestion. Effects of short-term exposure The substance is irritating to the respiratory tract.	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 long-term or repeated exposure The substance may have effects on the blood, bone marrow, central nervous system, peripheral nervous system, kidneys and lungs. This may result in anaemia, peripheral nerve disease, abdominal cramps and kidney impairment. This substance is carcinogenic to humans. May cause toxicity to human reproduction or development.

EXPOSURE & HEALTH EFFECTS

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

Effects of short-term exposure
The substance is irritating to the respiratory tract.

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 long-term or repeated exposure
The substance may have effects on the blood, bone marrow, central nervous system, peripheral nervous system, kidneys and lungs. This may result in anaemia, peripheral nerve disease, abdominal cramps and kidney impairment. This substance is carcinogenic to humans. May cause toxicity to human reproduction or development.

OCCUPATIONAL EXPOSURE LIMITS
TLV: (as Cr(VI), inhalable fraction): 0.0002 mg/m³, as TWA; 0.0005 mg/m³ as STEL; (DSEN); (RSEN); A1 (confirmed human carcinogen); BEI issued. TLV: (as Pb): 0.05 mg/m³, as TWA. EU-OEL: (as Cr): 0.005 mg/m³ as TWA; (see Notes). EU-OEL: (as Pb): 0.15 mg/m³ as TWA; (binding): BLV issued. MAK: (inhalable fraction): carcinogen category: 1; germ cell mutagen group: 2

ENVIRONMENT
Bioaccumulation of this chemical may occur along the food chain. The substance is very toxic to aquatic organisms. It is strongly advised not to let the chemical enter into the environment.

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 suggested. Do NOT take working clothes home. Lead chromate occurs in nature as the minerals crocoite, phoenicochroite. NEVER use a domestic-type vacuum cleaner to vacuum the substance, only use specialist equipment. EU-OEL limit value 0.010 mg/m³ until 17 January 2025. Limit value: 0.025 mg/m³ for welding or plasma cutting processes or similar work processes that generate fume until 17 January 2025.

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 suggested.
Do NOT take working clothes home.
Lead chromate occurs in nature as the minerals crocoite, phoenicochroite.
NEVER use a domestic-type vacuum cleaner to vacuum the substance, only use specialist equipment.
EU-OEL limit value 0.010 mg/m³ until 17 January 2025. Limit value: 0.025 mg/m³ for welding or plasma cutting processes or similar work processes that generate fume until 17 January 2025.

ADDITIONAL INFORMATION

EC Classification
Symbol: T, N; R: 45; R: 61-62-33-50/53; S: 53-45-60-61

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