... , sixth edition 1992Packaging: plastic round drum Net weight: 250kgStorage: stored in dry clean and airiness place, Valid period: 1yearIt is normal chemicals ... avoid sunlight and rain Itemstandard09082202resultApperanceIndentification Assay ,% Loss on dry ,% Reducing substances, % Sulfate ,% Chloride ,% Pb ,% Arsenic % , Heavy metals ,%White crystal ...