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| CAS No.: | 7758-97-6 |
|---|---|
| Name: | Lead chromate |
| Molecular Structure: | |
|
|
|
| Formula: | PbCrO4 |
| Molecular Weight: | 323.19 |
| Synonyms: | RoyalYellow 6000;Leadchromate(VI) (PbCrO4) (7CI);Chromium lead oxide (CrPbO4);Lead chromate;Leadchromate (PbCrO4);Lead chromium oxide (PbCrO4);Plumbous chromate; |
| EINECS: | 231-846-0 |
| Density: | 6.3 g/cm3 |
| Melting Point: | 844 °C |
| Solubility: | Insoluble in water |
| Appearance: | yellow to orange powder |
| Hazard Symbols: |
 T,  N
|
| Risk Codes: | 61-33-40-50/53-62 |
| Safety: | 53-45-60-61 |
| Transport Information: | UN 3077 9/PG 3 |
| PSA: | 80.26000 |
| LogP: | -0.85600 |
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Chemistry
IUPAC Name: Dioxido(dioxo)chromium; lead(2+)
Following is the structure of Lead chromate (CAS NO.7758-97-6):
Molecular formula: PbCrO4
Molar mass: 323.2 g/mol
EINECS: 231-846-0
Melting point: 844 °C
Density: 6.3 g/cm3
Water Solubility: Insoluble. <0.1 g/100 mL at 19 ºC
Stability: Stable. Reacts violently with ferric ferrocyanide.
Appearance of Lead chromate (CAS NO.7758-97-6): orange-yellow powder
Product Categories of Lead chromate (CAS NO.7758-97-6): Inorganics; Analytical Reagents for General Use; E-L, Puriss p.a. ACS; Puriss p.a. ACS; ACS GradeChemical Synthesis; Catalysis and Inorganic Chemistry; Essential Chemicals; Lead; Routine Reagents
Canonical SMILES: [O-][Cr](=O)(=O)[O-].[Pb+2]
InChI: InChI=1S/Cr.4O.Pb/q;;;2*-1;+2
InChIKey: MOUPNEIJQCETIW-UHFFFAOYSA-N
Uses
Lead chromate is used in some pyrotechnic compositions, especially delay compositions, as an oxidizer. Up to the late 1800s it was used to impart a bright yellow color to some types of candy.
Previously, its use was wider. Lead chromate and "white lead", or lead carbonate, were the most common lead-based paint pigments.
Toxicity Data With Reference
| 1. | cyt-hmn:lym 13 µmol/L | MUREAV Mutation Research. 77 (1980),157. | ||
| 2. | mnt-mus-ipr 500 mg/kg | TJEMAO Tohoku Journal of Experimental Medicine. 146 (1985),373. TUMOAB Tumori. 57 (1971),213. | ||
| 3. | orl-mus LD50:>12 g/kg | OYYAA2 Oyo Yakuri. Pharmacometrics. 2 (1968),76. | ||
| 4. | ipr-gpg LD75:156 mg/kg | MEIEDD Merck Index. 10 (1983),777. |
Consensus Reports
NTP 10th Report on Carcinogens. IARC Cancer Review: Group 1 IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 7 , 1987,p. 165.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Animal Inadequate Evidence IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 2 , 1973,p. 100.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Animal Sufficient Evidence IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 23 , 1980,p. 205.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Human Sufficient Evidence IMEMDT IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 23 , 1980,p. 205.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) . Lead and its compounds, as well as chromium and its compounds, are on the Community Right-To-Know List. Reported in EPA TSCA Inventory. EPA Genetic Toxicology Program.
Safety Profile
Confirmed carcinogen with experimental neoplastigenic and tumorigenic data. Poison by intraperitoneal route. Mildly is toxic by ingestion. Human mutation data reported. Potentially explosive reactions with azodyestuffs (e.g., dinitroaniline orange, chlorinated para red). Violent reaction with aluminum + dinitronaphthalene + heat. Forms pyrophoric mixtures with sulfur, tantalum, and iron(III) hexacyanoferrate(4−) (e.g., brunswick green pigment, prussian blue pigment). When heated to decomposition it emits toxic fumes of Pb. See also LEAD COMPOUNDS and CHROMIUM COMPOUNDS.
Hazard Codes: 
T,
N
Risk Statements: 61-33-40-50/53-62
R61:May cause harm to the unborn child.
R33:Danger of cumulative effects.
R40:Limited evidence of a carcinogenic effect.
R50/53:Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
R62:Risk of impaired fertility.
Safety Statements: 53-45-60-61
S53:Avoid exposure - obtain special instructions before use.
S45:In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
S60:This material and its container must be disposed of as hazardous waste.
S61:Avoid release to the environment. Refer to special instructions / safety data sheets.
RIDADR: UN 3077 9/PG 3
WGK Germany: 3
RTECS: GB2975000
HazardClass: 6.1
PackingGroup: III
Hazardous Substances: Data 7758-97-6(Hazardous Substances Data)
Standards and Recommendations
OSHA PEL: TWA 0.05 mg(Pb)/m3; CL 0.1 mg(CrO3)/m3
ACGIH TLV: 0.05 mg(Cr)/m3; Human Carcinogen
DFG MAK: Confirmed Animal Carcinogen with Unknown Relevance to Humans
NIOSH REL: (Chromium(VI)) TWA 0.001 mg(Cr(VI))/m3; (Inorganic Lead) TWA 0.10 mg(Pb)/m3
Analytical Methods
For occupational chemical analysis use NIOSH: Chromium Hexavalent, 7024.
Specification
Lead chromate , its cas register number is 7758-97-6. It also can be called Chromate de plomb ; Chromate de plomb [French] ; Lead chromate (PbCrO4) ; Lead chromate(VI) ; Lead(II) chromate ; Phoenicochroite ; and Plumbous chromate . Its classification code are Agricultural Chemical; Insecticide; Mutation data; TSCA Flag S [Substance is identified in a proposed or final SNUR (Significant New Use Rule) under TSCA] and Tumor data.