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Tungstic acid

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CAS:7783-03-1
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CAS:7783-03-1
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CAS:7783-03-1
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CAS:7783-03-1
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Products Intro: Product Name:Tungstic acid
CAS:7783-03-1
Purity:99+% Remarks:20761
Tungstic acid Basic information
Physical Properties Uses Preparation
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)-;Tungstate,dihydrogen ;Tunstic acid
CAS:7783-03-1
MF:H2O4W
MW:249.85
EINECS:231-975-2
Product Categories:catalyst of oil;Inorganics;AcidsMetal and Ceramic Science;Tungsten Salts;Electronic Chemicals;Micro/Nanoelectronics;Salts;metal oxide hydrate
Mol File:7783-03-1.mol
Tungstic acid Structure
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
Fp 1473°C
form powder
color Yellow to yellow-greenish
Water Solubility insoluble
Merck 14,9818
Stability:Stable. Incompatible with strong oxidizing agents.
CAS DataBase Reference7783-03-1(CAS DataBase Reference)
NIST Chemistry ReferenceTungstic acid(7783-03-1)
EPA Substance Registry SystemTungstate (WO42-), dihydrogen, (T-4)-(7783-03-1)
Safety Information
Risk Statements 36/37/38
Safety Statements 24/25
WGK Germany 3
RTECS YO7840000
TSCA Yes
HS Code 28259011
MSDS Information
ProviderLanguage
ACROS English
SigmaAldrich English
ALFA English
Tungstic acid Usage And Synthesis
Physical PropertiesYellow 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.
UsesTungstic acid is used in preparing tungsten metal and many tungsten compounds. Also, it is a mordant for textiles.
PreparationTungstic 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 Propertieslight yellow powder
Tag:Tungstic acid(7783-03-1) Related Product Information
Tungstic acid dithallium(I) salt Tungstic acid iron(II) salt Amines, C18-22-tert-alkyl, compds. with tungstic acid (H2WO4) Tungstic acid dipotassium salt Tungstic acid, 2-phenylethyl ester Tungstic acid 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 SILICOTUNGSTIC ACID HYDRATE SODIUM PHOSPHOTUNGSTATE Ammonium paratungstate phosphoric acid Ascoric Acid ACETIC ACID Tungstic acid, disodium salt