Potassium tungstate

  • Potassium tungsten oxide
  • Tungstate (WO42-), dipotassium, (T-4)-
  • Tungstic acid (H2WO4), dipotassium salt
  • Dipotassium tetraoxotungstate
Formula
K2WO4
Structure
Description
Odorless, white powder. Hygroscopic.

Registry Numbers and Inventories.
CAS
7790-60-5
EC (EINECS/ELINCS)
232-215-2
R: 36/37
Merck
12,7872
Canada DSL/NDSL
DSL
US TSCA
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
K2O4W
Formula mass
326.03
Melting point, °C
921
Density
3.12 g/cm3 (20 C)
Solubility in water
Slightly soluble

Hazards and Protection.
Storage
Store under dry inert gas. This product is hygroscopic. Protect from humidity and water. Store in cool, dry conditions in well sealed container
Protection
Protective work clothing. Chemical protective gloves. Safety glasses or goggles.
Stability
Decomposition will not occur if used and stored according to specifications.
Incompatibilities
Oxidizing agents, water/moisture.

Fire.
Fire fighting
Use fire fighting measures that suit the surrounding fire. Wear self-contained respirator. Wear fully protective impervious suit.
Fire potential
Product is not flammable.
Combustion products
Metal oxide fumes.
Health
1
 
Flammability
0
 
 
Reactivity
1
 

Health.
Exposure limit(s)
ACGIH TLV: 1 mg/m3 (as W)
Exposure effects
Tungsten compounds may be irritating to the eyes and respiratory tract. Animal studies suggest that soluble tungsten compounds have the potential for causing adverse health effects involving the gastrointestinal tract and central nervous system. These effects have not been observed in humans. Chronic exposure to tungsten compounds may result in permanent lung damage.

First aid
 
   Ingestion
Seek medical treatment.
   Inhalation
Supply fresh air. If required, provide artificial respiration. Keep patient warm. Seek immediate medical advice.
   Skin
Immediately wash with water and soap and rinse thoroughly. Seek immediate medical advice.
   Eyes
Rinse opened eye for several minutes under running water. Then consult a doctor.

Transport.