SILICOTUNGSTIC ACID AR

Chemical Information
Article No.	AL5424
Grade	AR
Purity	99.50%
CAS Number	12027-43-9
Molecular Formula	H4(SiW12O40)xH2O
Molecular Weight	2878.17 (anhydrous basis)
HS Code	2811.198
Shelf Life	5 Years

Physical Properties
Solubility in water(% weight)	Soluble in water
Colour	Slight yellow
Melting point/ Freezing point(°C)	25 °C
pH value	Acidic
Density (g/cm3)	4.5
Odour	Odorless
Physical state at 20 °C	Solid

Safety Information and Hazard Symbols
Signal Word	Warning
Precaution Statement	P261-P305 + P351 + P338
Symbol	GHS07
Hazardous Statement	H315-H319-H335

Specifications
Iron (Fe)	Max 0.001%
Assay	Min 99.5%
Sulphate (SO4)	Max 0.005%
Heavy metals (as Pb)	Max 0.002%
Chloride (Cl)	Max 0.001%
Appearance	Slightly yellow colored powder
Sodium (Na)	Max 0.02%