Copper tungstate

  • Cupric tungstate
  • Copper(II) tungstate
  • Copper tungsten oxide
  • Tungstic acid (H2WO4), copper(2+) salt (1:1)
Formula
CuWO4
Structure
Description
Odorless green powder.
Uses
Substance is used in semiconductors, nuclear reactors.

Registry Numbers and Inventories.
CAS
13587-35-4
EC (EINECS/ELINCS)
237-022-7
Merck
12,2726
Canada DSL/NDSL
NDSL
US TSCA
Listed
Korea ECL
Listed

Properties.
Formula
CuO4W
Formula mass
311.38
Solubility in water
Insoluble

Hazards and Protection.
Protection
Impervious gloves, safety glasses and protective clothing.
Respirators
Use suitable respirator when high concentrations are present.
Small spills/leaks
Wear a self-contained breathing apparatus and full protective clothing. Isolate the area where the spill occurred, insure proper ventilation is available. Vacuum up the spill using a high efficiency unit and place in a container for proper disposal. Take care not to raise dust.
Stability
Stable at normal temperatures and pressures.
Decomposition
Metal oxide fumes.

Fire.
Fire fighting
Use suitable extinguishing media for surrounding materials and type of fire. Firefighters must wear a full face, self-contained breathing apparatus and full protective clothing to prevent contact with skin and eyes.
Fire potential
Not flammable.
Health
1
 
Flammability
0
 
 
Reactivity
1
 

Health.
Exposure limit(s)
OSHA PEL: 1 mg/m3 (as Cu), 0.1 mg/m3 (as Cu fume)
Exposure effects
Copper compounds may be irritating to the skin, eyes and repiratory tract. They may cause metal fume fever, hemolysis of the red blood cells and injury to the liver, lungs, kidneys and pancreas. Ingestion may also cause vomiting, gastric pain, dizziness, anemia, cramps, convulsions, shock, coma and death. Copper solutions may cause sensitization reactions. Tungsten compounds are considered somewhat more toxic than those of molybdenum. However, industrially, this element does not constitute an important health hazard. Heavy exposure to the dust or the ingestion of large amounts of the soluble compounds produces changes in body weight, behavior, blood cells, choline esterase activity and sperm in experimental animals.
   Ingestion
Insoluble tungsten compounds are considered toxicologically inert.
   Inhalation
May act as a nuisance dust. Coughing, sneezing, difficulty breathing may occur. Chronic exposure may cause pulmonary granulomas. May cause irritation of the mucous membranes of the nose and throat.
   Skin
Mechanical irritation only. Chronic exposure may cause dermatitis and skin granulomas.
   Eyes
Mechanical irritation. Inflammation and redness possible.

First aid
 
   Ingestion
Give 2 glasses of water. Induce vomiting if large amounts were ingested. Seek medical attention immediately.
   Inhalation
Remove to fresh air; give oxygen if breathing is difficult. Seek medical attention immediately.
   Skin
Brush material off skin, wash area with soap and water. Seek medical attention immediately.
   Eyes
Flush eyes with lukewarm water for 15 minutes and seek medical attention immediately.

Transport.