223328
Tungstic acid
99%
Synonym(s):
dihydroxy(dioxo)tungsten
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About This Item
Linear Formula:
H2WO4
CAS Number:
Molecular Weight:
249.85
NACRES:
NA.23
PubChem Substance ID:
UNSPSC Code:
12352300
EC Number:
231-975-2
MDL number:
Assay:
99%
Form:
powder
Quality Level
assay
99%
form
powder
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
General description
Tungstic acid may be prepared by either digesting tungstate of lime or by treating tungsten with hydrochloric acid. 1
Application
Starting material for the synthesis of a novel dimeric heteropolyoxopeoxotungstate which has potential in further studies of grafted polyoxoperoxo species on silica.
Packaging
5 g packaged in glass bottles; 100 g, 500 g packaged in poly bottles
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signalword
Warning
hcodes
Hazard Classifications
Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3
target_organs
Respiratory system
Storage Class
13 - Non Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
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Piquemal, J-Y. et al.
Chemical Communications (Cambridge, England), 473-473 (1997)
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
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-)