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Tungstic acid refers to hydrated forms of tungsten trioxide, WO3. The simplest form, the monohydrate, is WO3·H2O, the dihydrate WO3·2H2O is also known. The solid state structure of WO3·H2O consists of layers of octahedrally coordinated WO5(H2O) units where 4 vertices are shared.[1] the dihydrate has the same layer structure with the extra H2O molecule intercalated between the layers.

 

TUNGSTIC ACID
Mol. Formula : H2WO4
Mol. Weight : 249.86
CASR NO : 7783-03-1
ASSAY (GRAVIMETRY) – Min 98%
 
CHLORIDE – 0.05 %
SUBSTANCE INSOLUBLE IN NaOH Solution – 0.2 %
 
SILICO TUNGSTIC ACID GR
Mol. Formula : H4SiW12O40. XH2O
Mol. Weight : 2878.29
Min. ASSAY – 99%

 

dodeca – TUNGSTO PHOSPHORIC ACID
EP ( PHOSPHO TUNGSTIC ACID )
Mol. Formula : H3PO4. 12WO3.XH2O
CASR No : 12501 – 23 – 4
 
MAXIMUM LIMITS OF IMPURITIES :

CHLORIDE ( Cl )

0.02 %

NITRATE ( NO)

0.01 %
AMMONIA

0.01 %
 
dodeca – TUNGSTO PHOSPHORIC ACID A.R
( PHOSPHO TUNGSTIC ACID )
 
MAXIMUM LIMITS OF IMPURITIES :

CHLORIDE ( Cl )

0.005 %

NITRATE ( NO)

0.002 %
AMMONIA ( NH)

0.001 %
 
Note: We can manufacture other tungsten salts on special order.