C6H8N2O2S M.W. 172.20
DESCRIPTION ....... White crystalline powder
SOLUBILITY ....... 10%soln in hot methanol is clear & colourless
ASSAY ............. min 99%
MELTING POINT ..... 164-166??C
LOSS ON DRYING .... max 0.5%
SULPHATED ASH ..... max 0.1%
CHLORIDE(Cl) ...... max 0.01%
SULPHATE(SO4) ..... max 0.02%
IRON(Fe) .......... max 0.001%
HEAVY METALS(Pb) .. max 0.002%