Anhydrous Sodium sulfite (Na2S2O3):GB 9005—88

Index name	Top-grade	First grade	Second grade
Sodium sulfite %≥	97	96	93
Fe %≤	0.003	0.005	0.01
Water insoluble matter %	0.02	0.3	0.05
Free alkali %≤	0.1	0.4	0.6
Sulfate radical %≤	2.5	-	-
Sodium chloride %≤	0.1	-	-

Properties: white crystalline powder, Density 2.633,

Uses: used in drug, tannage, leather and bleaching of plant

Packing:plastic bag (tied or thermal sealing ) lined plastic woven bag (seamed). Net wet 25kg or 50kg