Sodium Hydrosulfite
CAS NO:7775-14-6
CAS NO:7775-14-6
H.S code:28311000
Content: 85% 88% 90%
Grade:Industry grade and food additive grade
Grade:Industry grade and food additive grade
Specification:
|
Guidelines
|
90%
|
|
Na2S2O4
|
≥90%
|
|
Fe
|
≤20ppm
|
|
Zinc (Zn)
|
≤1ppm
|
|
Other heavy metal (With Pb to calculate )
|
≤1ppm
|
|
Matter which does not dissolve in water
|
≤0.05%
|
|
Storage time limit( month )
|
12
|
Usage:
(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
(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
Package:
50 kg net in iron drums with double inner polybags. 21MT(420drums) in 20ft container. 21 mt without pallets or 18mt on pallets
Quality Standard:
|
INDEX
|
90%
|
88%
|
85%
|
FOOD ADDITIVE
|
|
Na2S2O4
|
≥90%
|
≥88%
|
≥85%
|
≥85%
|
|
Fe
|
≤20ppm
|
≤20ppm
|
≤20ppm
|
≤20ppm
|
|
ZincZn
|
≤1ppm
|
≤1ppm
|
≤1ppm
|
≤1ppm
|
|
Other heavy metal
calculated as Pb
|
≤1ppm
|
≤1ppm
|
≤1ppm
|
≤1ppm
|
|
Water Insolubles
|
≤0.05%
|
≤0.05%
|
≤0.05%
|
≤0.05%
|
|
Shelf Life(month)
|
12
|
12
|
12
|
12
|