95420
Tungstic acid
≥98.0% (calcined substance, T), powder
Synonym(s):
Tungstic(VI) acid
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About This Item
Linear Formula:
H2WO4
CAS Number:
Molecular Weight:
249.85
EC Number:
MDL number:
UNSPSC Code:
12352300
PubChem Substance ID:
NACRES:
NA.23
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Quality Level
Assay
≥98.0% (calcined substance, T)
form
powder
impurities
≤0.2% insoluble matter in NaOH
loss
≤9.0% loss on ignition
density
5.5 g/mL at 25 °C (lit.)
SMILES string
O[W](O)(=O)=O
InChI
1S/2H2O.2O.W/h2*1H2;;;/q;;;;+2/p-2
InChI key
CMPGARWFYBADJI-UHFFFAOYSA-L
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General description
Tungstic acid may be prepared by either digesting tungstate of lime or by treating tungsten with hydrochloric acid. 1
Signal Word
Warning
Hazard Statements
Precautionary Statements
Hazard Classifications
Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3
Target Organs
Respiratory system
Storage Class Code
13 - Non Combustible Solids
WGK
WGK 3
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Personal Protective Equipment
dust mask type N95 (US), Eyeshields, Gloves
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Laura Barrio et al.
The journal of physical chemistry. A, 111(11), 2166-2171 (2007-03-29)
The catalytic system formed by tungstic acid and its complexes with H2O2 and phenylphosphonic acid has been analyzed from the experimental and theoretical points of view. Previous structural studies by XRD proved the validity of the DFT proposed models and
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Angewandte Chemie (International ed. in English), 46(21), 3877-3880 (2007-04-20)
Thierry Barré et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 61(4), 551-557 (2005-01-15)
This study is focused on the composition and the evolution of tungstate ions solutions as a function of pH and increasing concentrations. The Raman analysis showed that, during the titration of the tungstate solutions, WO4(2-), HWO4- ions and probably W2O7(2-)
Shaopu Liu et al.
Analytical sciences : the international journal of the Japan Society for Analytical Chemistry, 19(7), 1055-1060 (2003-07-26)
In a weak acid medium, when an isopoly-tungstic acid reacts with berberine to form an ion-association complex, strong resonance Rayleigh scattering (RRS) appears and obvious frequency-doubling scattering (FDS) as well as second-order scattering (SOS) come into being. The scattering peaks
J W White et al.
Journal - Association of Official Analytical Chemists, 72(6), 907-911 (1989-11-01)
Using the difference in stable carbon isotope ratio between a honey and its protein fraction permits objective evaluation of possible adulteration of honey with small amounts (7-20%) as well as larger amounts of corn or cane sugar. The present uncertainty
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