1.sodium hydrosulfite 2.Cas no.:7775-14-6 3.White crystalline powder 4.90.5% ,88.5% ,85.5% min 5.50kgs per drum

sodium hydrosulfite

1) Used as reducer, dyes auxiliary of dyeing industry, synthetic dyes and intermediates.(2) Used as bleaching agent of paper pulp in paper-making industry.  (3) Used as bleaching agent of china clay in the ceramics industry.  (4) Used as deoxidizer of rubber and styrene butadiene rubber synthesis, developer in photo-taking industry.(5) Used as reducing agent, bleaching agent in the industries including pharmacy, food, metallurgy and leather

No.	Index name	Index			Note
		90%specification	88%specification	85%specification
1	Appearance	White crystalline powder	White crystalline powder	White crystalline powder	Eye measurement
2	Hydros content% ≥	90.5	88.5	85.5	Compulsory test
3	Content of insoluble substancein water % ≤	0.1	0.1	0.2	Spot test
4	Content of sodium carbonate%≥	1	1	1	Spot test
5	Granularity	A, B	A, B, C	A, B, C, D	Compulsory test ( Eye measurement )
6	Odor	Gentleness	Gentleness	Gentleness	Compulsory test

Sodium hydrosulfite