Item standard RESULT Content(CrO3 )% 99.85min 99.9 Sulphate(SO42-)% 0.05max 0.04 Sodium (Na)% 0.02max 0.17 Water insolubles% 0.02max             0.16 Turbidity% 3.0max              2.0 Iron(Fe) 0.005max             0.04