95420
钨酸
≥98.0% (calcined substance, T), powder
别名:
Tungstic(VI) acid
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关于此项目
线性分子式:
H2WO4
化学文摘社编号:
分子量:
249.85
NACRES:
NA.23
PubChem Substance ID:
UNSPSC Code:
12352300
EC Number:
231-975-2
MDL number:
Assay:
≥98.0% (calcined substance, T)
Form:
powder
form
powder
InChI key
CMPGARWFYBADJI-UHFFFAOYSA-L
InChI
1S/2H2O.2O.W/h2*1H2;;;/q;;;;+2/p-2
SMILES string
O[W](O)(=O)=O
assay
≥98.0% (calcined substance, T)
impurities
≤0.2% insoluble matter in NaOH
loss
≤9.0% loss on ignition
density
5.5 g/mL at 25 °C (lit.)
Quality Level
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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
signalword
Warning
hcodes
Hazard Classifications
Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3
target_organs
Respiratory system
存储类别
13 - Non Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
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
Multiple reversible protonation of polyoxoanion surfaces: direct observation of dynamic structural effects from proton transfer.
Xikui Fang et al.
Angewandte Chemie (International ed. in English), 46(21), 3877-3880 (2007-04-20)
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
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
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