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Product Attributes

Synonyms : Hydrosulfite; sodium dithionite; sodium dithionite; disodium dithionite;

CAS No. : 7775-14-6

EINECS : 231-890-0

Molecular formula : Na₂O₄S₂

Molecular weight: 174.11

Density:2.13 g/cm³

Melting Point : 300 °C

Product details

Index	90%	88%	85%	Food additive	74%
Na₂S₂O₄	≥90%	≥88%	≥85%	≥85%	≥74%
Fe	≤20ppm	≤20ppm	≤20ppm	≤20ppm	≤30ppm
Zinc(Zn)	≤1ppm	≤1ppm	≤1ppm	≤1ppm	≤1ppm
Other heavy metal(calculated as Pb)	≤1ppm	≤1ppm	≤1ppm	≤1ppm	≤1ppm
Water insolubles	≤0.05%	≤0.05%	≤0.05%	≤0.05%	≤0.05%
Shelf life(month)	12	12	12	12	12

Bleaching agents used for mechanical pulp, thermal mechanical pulp, and deinked pulp in the paper industry

Used in the synthesis of ore dressing, thiourea, and its sulfides

As a food additive for preservation, antioxidant, and bleaching functions

Used as a bleaching agent and disinfectant

Used in water treatment, leather processing, textile industry, and other industrial sectors

Packed in 50kg iron drum with double inner plastic bags.

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Sodium Hydrosulfite