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
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 | ≤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 |
Applications and usages :
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.
Sodium Salt
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In China, we have established a strong business foundation and have set up office in Shanghai, focusing on providing customers with supply chain solutions for specialty chemicals as well as international sourcing and distribution services.