Item	GB6009-2003 Class I first quality	Actual measurement value of regular products	Actual measurement value of of neutral products	Actual measurement value of low-chlorine products
sodium sulphate %(Na2SO4)	≥ 99.0	99.20	99.30	99.65
water insolubles %	≤ 0.05	0.02	0.03	0.01
Mg %	≤ 0.15	0.02	0.02	0.02
chlorides %(Cl)	≤ 0.35	0.19	0.20	0.04
iron %(Fe)	≤ 0.002	0.001	0.001	0.001
iron %(Fe)	≤ 0.20	0.02	0.02	0.02
iron %(Fe)	≥ 80	88	85	83
iron %(Fe)	not required	not required	(1% solution)7.5	(5% solution)7.2

Sodium, inorganic compounds without water, another name MangXiao, white, odourless, has a bitter taste crystallization or powder, has hygroscopic. The outline is colorless, transparent, big crystallization or granularity small crystallization. Mainly used to make the sodium silicate, glass, ceramic glaze, pulp, refrigeration mixture, detergent, desiccant, dye diluent, analytical chemistry reagents, pharmaceuticals