Plumbous chromate
Chromic acid, lead (II) salt (11)
PbCrO4
Molecular mass: 323.2
ICSC # 0003
CAS # 7758-97-6
RTECS # GB2975000
UN # 3288
EC # 082-004-00-2
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Types of Hazard/ Exposure
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Acute Hazards/ Symptoms
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Prevention
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First Aid/
Fire Fighting
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FIRE
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Not combustible.
Gives off irritating or toxic fumes (or gases) in a fire.
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In case of fire in the surroundings: all extinguishing agents allowed.
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Explosion
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Exposure
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AVOID ALL CONTACT!
PREVENT DISPERSION OF DUST!
AVOID Exposure OF (PREGNANT) WOMEN!
AVOID Exposure OF ADOLESCENTS AND CHILDREN!
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•Inhalation
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Cough.
Headache.
Nausea.
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Local exhaust or breathing protection.
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Fresh air, rest.
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•Skin
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See EFFECTS OF LONG-TERM OR REPEATED Exposure.
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Protective gloves.
Protective clothing.
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Rinse and then wash skin with water and soap.
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•Eyes
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Redness.
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Safety goggles,
or eye protection in combination with breathing protection if powder.
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First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
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•Ingestion
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Abdominal pain.
Nausea.
Vomiting.
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Do not eat, drink, or smoke during work.
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Rinse mouth.
Give plenty of water to drink.
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Spillage Disposal
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Storage
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Packaging & Labelling
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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.
Personal protection: P3 filter respirator for toxic particles.
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Separated from
strong oxidants.
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Unbreakable packaging; put breakable packaging into closed unbreakable container.
Marine pollutant.
T symbol
N symbol
R: 61-33-40-50/53-62
S: 53-45-60-61
UN Hazard Class: 6.1
UN Packing Group: III
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Important Data
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Physical State; Appearance:
YELLOW
TO ORANGE
-YELLOW CRYSTALLINE POWDER
Physical Dangers:
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 2004). TLV: as Cr 0.012 mg/m3 ( as TWA ); A2; (ACGIH 2004).
MAK:
Carcinogen category: 3B;
(DFG 2004).
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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 quicklyon 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.
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Physical
Properties
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Boiling point (decomposes): not available
Melting point: 844°C
Density: 6.3
g/cm3
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Solubility in water, g/100 ml at 25°C: 0.0000058
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Environmental
Data
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Bioaccumulation of this chemical may occur along the food chain, for examplein fish,in plants,in mammals.
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N O T E S
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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.
Transport Emergency Card: TEC (R)-61GT5-III
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ADDITIONAL INFORMATION
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ICSC: 0003
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LEAD CHROMATE
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(C) IPCS, CEC, 1994
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IMPORTANT LEGAL NOTICE:
Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH,
the CEC or the IPCS is responsible for the use which might be made of this
information. This card contains the collective views of the IPCS Peer Review Committee and may
not reflect in all cases all the detailed requirements included in national legislation
on the subject. The user should verify compliance of the cards with the relevant legislation
in the country of use.
The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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