... price 3.Big quantity 4.Refined by natural mine Na2SO4 is mainly used in synthetic detergent, vinylon, sodium silicate, bleaching, dyeing ... so on.Packing & storage : Net wt 25kg, 50kg or 1,000kg in PE bag lined plastic woven bag, Kept ... place, avoid moisture and rain, Do nor package broken or leakage. Do not mix with food, coal and cement. ... %≤0.0020.001Moisture %≤0.200.02Whiteness %≥8290 Natural Na2SO4