LEAD TUNGSTATE Property

Melting point:

400°C

Density 

8.460

solubility 

soluble in alkaline solutions

form 

yellow tetragonal crystals

color 

yellow tetragonal crystals, crystalline

Water Solubility 

insoluble H2O, cold HNO3; soluble in fixed alkali hydroxides [MER06]

Solubility Product Constant (Ksp)

pKsp: 6.35

EPA Substance Registry System

Lead tungsten oxide (PbWO4) (7759-01-5)

Safety

Hazard Codes 

T,N

Risk Statements 

61-20/22-33-50/53-62

Safety Statements 

53-45-60-61

RIDADR 

UN 2291 6.1/PG 3

WGK Germany 

3

Hazardous Substances Data

7759-01-5(Hazardous Substances Data)

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

Precautionary statements

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P332+P313IF SKIN irritation occurs: Get medical advice/attention.

P337+P313IF eye irritation persists: Get medical advice/attention.

LEAD TUNGSTATE Chemical Properties,Usage,Production

Chemical Properties

white powder(s); used as a pigment [HAW93]

Definition

scheelite: A mineral form of calciumtungstate, CaWO4, used as anore of tungsten. It occurs in contactmetamorphosed deposits and veindeposits as colourless or white tetragonalcrystals.

General Description

White to pale yellow powdery solid. Sinks in water.

Reactivity Profile

LEAD TUNGSTATE has weak oxidizing or reducing powers. Redox reactions can however still occur. The majority of compounds in this class are slightly soluble or insoluble in water. If soluble in water, then the solutions are usually neither strongly acidic nor strongly basic. These compounds are not water-reactive.

Health Hazard

INHALATION: Joint and muscle pains, headache, dizziness and insomnia. Weakness, frequently of extensor muscles of hand and wrist (unilateral or bilateral). Heavy contamination - Brain damage. Stupor progressing to coma - with or without convulsion, often death. Excitation, confusion, and mania less common. Cerebrospinal pressure may be increased. INGESTION: Abdominal pain, diarrhea, constipation, loss of appetite, muscular weakness, headache, blue line on gums, metallic taste, nausea and vomiting, joint and muscle pain.