CERTIFICATE OF ANALYSIS

Product Name	SILICOTUNGSTIC ACID AR	CAS Number	12027-43-9
Molecular Formula	[H 4 (SiW O 3 O 10 ) 4 ].XH 2	Catalogue No.	AL5424
Molecular Weight	2878.29	Batch Number
Manufacturing Date	December-2020	Expire Date	November-2025

TYPE OF TEST	STANDARD	OBSERVED
Description Assay Chloride (Cl ) Sulphate (SO4) Nitrogen compound (N) Heavy metals (as Pb) Iron (Fe) Potassium (K) Sodium (Na) Loss on ignition at 750°C	Slightly yellow colored powder (Min.) 99.5% <0.005% <0.005% <0.002% <0.002% <0.001% <0.02% <0.02% <16.00%	Slightly yellow colored powder 99.79% <0.005% 0.004% 0.001% <0.002% <0.001% 0.0082% <0.02% 11.36%

Result: The above product complies with AR grade

Tested By
Hitesh Kunjathur

Analysed By
Preeti Rane