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68684-55-9, Thiamine Diphosphoric Acid Ester Ttetrahydrate, CAS: 68684-55-9 C12H18N4O7P2S·4H2O / 496.37 MFCD00150680COA: Name: Thiamine Diphosphoric Acid Ester Ttetrahydrate or Cocarboxylase Tetrahydrate CAS: 68684-55-9          M.F.: C12H18N4O7P2S.4H2O         M.W.:496.37   Items Standards Results Appearance White crystalline power Complies Solubility Easily soluble in water, insoluble in general organic solvent Complies Identification IR and HPLC Complies pH (10%) 2 - 4 3.1 Thiamine  monophosphoric acid ester Max. 1% 0.48% Other any impurity Max. 0.5% Complies Chlorides Max. 0.1% Complies Heavy metals Max.20ppm Complies Water Content 14% - 16% 14.6% Free H3PO4 Max. 0.5% Complies Assay by HPLC Min. 98% 99.4%