SILICOTUNGSTIC ACID (FOR SYNTHESIS)

Article No.	Grade	Purity	Cas no.	Molecular Formula	Molecular Weight	H.S. Code	Shelf Life
S0181800025	FOR SYNTHESIS	99.5%	12027-43-9	H₄(SiW₁₂O₄₀)xH₂O	2878.17 (anhydrous basis)	2811.1990	60 Months

Physical Properties

Physical state at 20 °C

Solid

Colour

Slight yellow

Odour

Odorless

pH value

Acidic

Melting Point/ Freezing point [°C]

25°C

Density [g/cm3]

4.5

Solubility in water [% weight]

Soluble in water

Appearance:	Slightly yellow colored powder
Chloride (Cl):	Max 0.001%
Sulphate (SO4):	Max 0.005%
Heavy metal (as Pb):	Max 0.002%
Sodium (Na):	Max 0.02%
Iron (Fe):	Max 0.001%
Assay:	Min 99.5%
Potassium (K):	Max 0.02%
Total nitrogen (N):	Max 0.002%
Loss on ignition (at 750°C):	Max 16.0%

Symbol: GHS07
Signal Word: Warning
Hazardous Statement: H315-H319-H335
Precaution Statement: P261-P305 + P351 + P338