Alias: dipyrithione; BISPYRITHIONE; 2,2'-Dithiobis (pyridine-N-oxide); 2,2'-disulfanediylbis(pyridine) 1,1'-dioxide CAS: 3696-28-4 Chemical Molecular Formula: C10H8N2O2S2 Chemical Structural Formula: Chemical Structural Formula: 252.3054 (1)Content: â?¥ 99 % PH(1%solution): 5.0ï½?7.0 AppearanceOff-white Powder Melting Point: 175 â?? MIN Dry on loss : 0.5% max (2)Assay â?¥80% PH(1%solution) 5.0-7.0 Drying Lossâ?¤20% (3)Appearance Off-white dispersion Assay(Pyrithione Disulfide) 30.0%± 1 PH value(1% solution) 6.0-8.0 Specific gravity(g/ml@25â??) 1.010-1.300 Total Microbial Count Negative