Lead chromate Chemical Properties
- Melting point:
- 6,3 g/cm3
- Water Solubility
- Insoluble. <0.1 g/100 mL at 19 ºC
- 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)
Lead chromate Usage And Synthesis
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.
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.
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+ + CrO42¯ → PbCrO4
The yellow precipitate is filtered, washed and dried.
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.
yellow to orange powder
Lead chromate is an orange or orange-yellow crystalline solid or powder.
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.
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.
ChEBI: A chromium coordination entity comprising chromate and lead(2+) ions in a 1:1 ratio
Lead chromate is used to make paint pigments for wood and metal
UN3085 Oxidizing solid, corrosive, n.o.s, Hazard Class: 5.1; Labels: 5.1-Oxidizer, 8-Corrosive material, Technical Name Required.
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)
Lead chromate Preparation Products And Raw materials
- LEAD(II) SULFATE
- Sodium chromate
- Lead chromate oxide (Pb2(CrO4)O)
- Basic lead chromate
- Lead (II) Chloride
- LEAD SILICOCHROMATE
- Basic lead chromate orange
- Lead(Ⅱ) chromate，sintered，partical
- Lead(Ⅱ) chromate basic
- Lead chromate oxide
- chromium dioxide
- Chromic acid
- Lead chromate
- Lead dichromate
- Pale chrome yellow
- Middle chrome yellow
- Middle Chrome Yellow 103
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