Silicotungstic Acid

Specification:
Industrial grade,
WO3≥84%
SiO2 1.7-2.4%

Chemically pure (CP grade)
WO3≥84%
SiO2 1.8-2.3%
Water insoluble matter≤0.02%
Chloride (CI)﹤0.03%
Sulphate (SO4)≤0.02%
Nitrate (NO3)≤0.02%
Heavy metals (Pb)≤0.005%

From the point of view of physical and chemical properties, the appearance of tungstic acid is white or light yellow crystalline powder, non-toxic, non-flammable, with a certain irritant, purity up to 98%, density 2.099g/cm3, boiling point 220°C, soluble in water, ethanol and ether, stable existence at room temperature and pressure, but it will dissolve in its own crystal water when heated. When heated to about 600℃, it will decompose and has the characteristics of acidity, oxidation and catalytic activity. Note: Store in a sealed and dry place, avoid light, open flame and high temperature.

From the use point of view, silicotungstic acid can be used as a biochemical reagent, such as made of heavy liquid can be used to flotation minerals or made of biochemical reagents can be used for alkaloid precipitation and determination; Used as mordant, such as alkaline aniline dye mordant; Used as a catalyst for organic synthesis, such as the reaction of acetic acid and ethylene to ethyl acetate, and the reaction of ethylene oxidation to acetic acid; Used as a modifier for photochromic materials, such as modified silica nanofilms.