Tungstic acid
Tungstic acid Basic information
- Product Name:
- Tungstic acid
- Synonyms:
-
- dihydrogen,(T-4)-Tungstate
- O2W(OH)2
- Orthotungstic acid
- Tungstate (WO42-), dihydrogen, (T-4)-
- Tungstate (WO42-), dihydrogen, (T-4)-
- Tungstate,dihydrogen,(T-4)-
- Tunstic acid
- Wolframic acid
- CAS:
- 7783-03-1
- MF:
- HO4W-
- MW:
- 248.84
- EINECS:
- 231-975-2
- Product Categories:
-
- metal oxide hydrate
- Inorganics
- AcidsMetal and Ceramic Science
- Tungsten Salts
- Electronic Chemicals
- Micro/Nanoelectronics
- Salts
- catalyst of oil
- Mol File:
- 7783-03-1.mol
Tungstic acid Chemical Properties
- Melting point:
- 100°C (dec.)
- Boiling point:
- 1473°C
- Density
- 5.5 g/mL at 25 °C (lit.)
- refractive index
- 2.24
- Flash point:
- 1473°C
- storage temp.
- Sealed in dry,Room Temperature
- solubility
- insoluble in H2O, acid solutions; soluble in alkaline solutions
- form
- powder
- color
- Yellow to yellow-greenish
- Specific Gravity
- 5.5
- Water Solubility
- insoluble
- Merck
- 14,9818
- Exposure limits
- ACGIH: TWA 3 mg/m3
NIOSH: TWA 5 mg/m3; STEL 10 mg/m3 - Stability:
- Stable. Incompatible with strong oxidizing agents.
- CAS DataBase Reference
- 7783-03-1(CAS DataBase Reference)
- NIST Chemistry Reference
- Tungstic acid(7783-03-1)
- EPA Substance Registry System
- Tungstate (WO42-), dihydrogen, (T-4)- (7783-03-1)
MSDS
- Language:English Provider:ACROS
- Language:English Provider:SigmaAldrich
- Language:English Provider:ALFA
Tungstic acid Usage And Synthesis
Physical Properties
Yellow amorphous powder; density 5.59 g/cm3; decomposes at 100°C; insoluble in water and most acids; soluble in hydrofluoric acid, caustic alkalies and ammonia solution. Freshly prepared tungstic acid containing a molecule of water of crystallization is moderately soluble in water.
Uses
Tungstic acid is used in preparing tungsten metal and many tungsten compounds. Also, it is a mordant for textiles.
Preparation
Tungstic acid is obtained as an intermediate in the recovery of tungsten from its minerals, scheelite and wolframite (See Tungsten). Also, the tungstic acid may be prepared by heating sodium tungstate with sulfuric acid or hydrochloric acid:
Na2WO4 + 2HCl → H2WO4 + 2NaCl
Na2WO4 + H2SO4 → H2WO4 + Na2SO4
Chemical Properties
light yellow powder
Physical properties
Yellow amorphous powder; density 5.59 g/cm3; decomposes at 100°C; insoluble in water and most acids; soluble in hydrofluoric acid, caustic alkalies and ammonia solution. Freshly prepared tungstic acid containing a molecule of water of crystallization is moderately soluble in water.
Uses
Tungstic Acid is used as a starting material in the synthesis of polynanocomposite material and polycrystalline ceramics.
Definition
ChEBI: Tungstic acid is a tungsten coordination entity. It is a conjugate acid of a hydrogentungstate.
General Description
Tungstic acid may be prepared by either digesting tungstate of lime or by treating tungsten with hydrochloric acid. 1
Flammability and Explosibility
Not classified
Tungstic acid Preparation Products And Raw materials
Raw materials
Preparation Products
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Tungstic acid(7783-03-1)Related Product Information
- Glycine
- TUNGSTIC ACID SODIUM DIHYDRATE,Tungstic acid dihydrate sodium salt,TUNGSTIC ACID NA-SALT 2H2O,TUNGSTIC ACID SODIUM SALT DIHYDRATE
- Folic acid
- Citric acid
- Tungstic acid calcium salt
- Tungstic acid dipotassium salt
- Ethyl 2-(Chlorosulfonyl)acetate
- Phosphotungstic acid 44-hydrate
- Sodium tungstate
- BISMUTH TUNGSTATE
- Zirconium tungstate
- ZINC TUNGSTATE
- AMMONIUM TUNGSTATE 99.99%
- Ascoric Acid
- SILICOTUNGSTIC ACID HYDRATE
- SODIUM PHOSPHOTUNGSTATE
- Tungstic acid anhydride
- Sodium tungstate