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Lead chromate

Product Name:
Lead chromate
CAS No.
7758-97-6
Chemical Name:
Lead chromate
CBNumber:
CB0347028
Molecular Formula:
CrO4Pb
Formula Weight:
323.19
MOL File:
7758-97-6.mol
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Lead chromate Property

Melting point:
844°C
Density 
6,3 g/cm3
form 
sintered
color 
Yellow
Water Solubility 
Insoluble. <0.1 g/100 mL at 19 ºC
Merck 
14,5405
Stability:
Stable. Reacts violently with ferric ferrocyanide.
CAS DataBase Reference
7758-97-6(CAS DataBase Reference)
EPA Substance Registry System
Lead(II) chromate (7758-97-6)
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Safety

Hazard Codes 
T,N
Risk Statements 
61-33-40-50/53-62-45
Safety Statements 
53-45-60-61
RIDADR 
UN 3077 9/PG 3
WGK Germany 
3
RTECS 
GB2975000
TSCA 
Yes
HazardClass 
6.1
PackingGroup 
III
Hazardous Substances Data
7758-97-6(Hazardous Substances Data)
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N-Bromosuccinimide Price More Price(3)

Sigma-Aldrich Gold
Product number:
15327
Product name :
Lead(II) chromate
Purity:
purum p.a., ACS reagent, ≥98.0% (RT)
Packaging:
100g
Price:
$63.6
Updated:
2019/12/02
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Buy
Alfa Aesar Gold
Product number:
A10678
Product name :
Lead(II) chromate, 98%
Packaging:
250g
Price:
$76.5
Updated:
2019/12/02
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Alfa Aesar Gold
Product number:
A10678
Product name :
Lead(II) chromate, 98%
Packaging:
1kg
Price:
$231
Updated:
2019/12/02
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Lead chromate Chemical Properties,Usage,Production

Physical Properties

Yellow monoclinic crystals; refractive index 2.31; density 6.12 g/cm3; melts at 844°C; decomposes on further heating; insoluble in water; also insoluble in ammonia and acetic acid; soluble in acids and alkalies.
Lead chromate
Lead chromate  is used in the production of commercial lead chromate pigments, such as Primrose Chrome Yellow, Light Chrome Yellow and Medium Chrome Yellow, containing 65-89% lead chromate (IARC 1990).
Lead chromate(VI) is also used in the preparation of green pigments such as chrome green or green cinnabar, in which it is mixed with Prussian blue (qq.v.). It is also listed by the Colour Index as a component of Pigment Green 15.

Occurrence and Uses

Lead chromate occurs in nature as the minerals, crocoite and phoenicochroite. It is an important pigment of lead used in oil paints and water colors. It is used for printing textiles and coloring porcelain.

History

Lead chromate(VI), PbCrO4, also known as plumbous chromate, was first synthesised around 1800, with its potential use as a pigment first reported by Berthollet and Vauquelin in 1804. According to Vauquelin (1809), it was prepared by adding lead acetate or lead nitrate to potassium chromate, and the shade of the precipitate could be varied (from yellow to orange or red) by adjusting the acidity/alkalinity of the products. Lead chromate( VI), which occurs naturally as the rare mineral crocoite (Rutley, 1988), is known as the pigment chrome yellow (qq.v.). It is listed by the Colour Index (1971) as CI Pigment Yellow 34 (CI 77600). The commercial manufacture of the pigment was largely influenced by the availability of suitable raw materials (usually in the form of the abundant mineral chromite, FeCr2O4). The earliest record of the use of chrome yellow is in a painting by Sir Thomas Lawrence dated prior to 1810 (Kühn, 1969). Sources of the pigment are reported by Harley (1982, citing Field, 1809) to be available by 1814-15, with Bollman (1769-1821) cited as the first commercial manufacturer in England, with production beginning around 1814-16.

Production

Lead chromate is found naturally in minerals crocoite and phoenicochroite. It also is readily prepared by adding a soluble chromate such as sodium or potassium chromate to a solution of lead nitrate, lead acetate or other soluble lead(II) salt in neutral or slightly acidic solution:
Pb2+ + CrO4 → PbCrO4
The yellow precipitate is filtered, washed and dried.

Toxicity

Moderately toxic by intraperitoneal route. The effects, however, are mild from oral intake. Occupational exposure may cause cancer. There is sufficient evidence of carcinogenicity in animals and humans.

Chemical Properties

Lead chromate is an orange or orange-yellow crystalline solid or powder.

Uses

It is used in chemical analysis of organic substances. pigment for paints and inks; in oil and water colors; printing fabrics, decorating china and porcelain; in chemical analysis of organic substances; in traffic paints.

Uses

Lead chromate (PbCrO4) is found in nature as yellow crystals in the mineral crocoite. It can be produced by reacting lead chloride and sodium dichromate. It is a popular and safe yellow pigment.

Definition

ChEBI: A chromium coordination entity comprising chromate and lead(2+) ions in a 1:1 ratio

Potential Exposure

Lead chromate is used to make paint pigments for wood and metal

Shipping

UN3085 Oxidizing solid, corrosive, n.o.s, Hazard Class: 5.1; Labels: 5.1-Oxidizer, 8-Corrosive material, Technical Name Required.

Incompatibilities

Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides, and active metals; hydrazine, sodium, and potassium; organics at elevated temperature. Reacts with aluminum dinitronaphthalene, iron(III) hexacyanoferrate (IV)

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Lead chromate Suppliers

Global(130)Suppliers
Meryer (Shanghai) Chemical Technology Co., Ltd.
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Alfa Aesar
Tel:
400-610-6006; 021-67582000
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021-67582001/03/05
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7758-97-6, Lead chromateRelated Search:

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Physical Properties Occurrence and Uses History Production Toxicity