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Sodium hydrosulfite

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  Post Date: Nov 25,2024
  Expiry Date: May 24,2025
  Detailed Description: Cas No. :7775-14-6

Alias: sodium dithionite

Molecular formula: Na2S2O4

English name: Sodium Hydrosulphite, Sodium dithionite Appearance: white crystalline powder

Relative density (water=1): 1.02

UN No.: 1384

Chemical stability: according to the recommended disposal and storage method, it is stable at normal temperature in a closed container.

Possibility of dangerous reaction: it can burn when heated or exposed to open flame. Exposed to the air will be oxidized and deteriorated. In contact with water, acids or organic substances and oxidants, it can release a lot of heat and cause severe combustion.

Conditions to avoid: self-heating can occur.

Incompatible substances and materials: strong oxidants, etc.

Hazardous decomposition products: combustion products include sulfur oxides (SOx). Use: This product is used as a dyeing aid for cotton fabrics and a bleaching agent for cotton and wool fabrics. It is also used in medicine, mineral processing, copper plate printing, synthesis of thiourea and other sulfides. Paper industry is also used as bleach, and food-grade products are used as bleach, preservative and antioxidant

        ITEM STANDARD
Hydrosulphite  74%  85%  88%  90%
Water insoluble 0.3     max 0.3      max 0.1     max 0.1      max
Sodium thiosulfate: Na2S2O3 1.4      max 1.5  max 1.3      max 1.0      max
Sodium metabisulfite: Na2S2O5   5-7 5-7 5-7 5-7
Sodium bisulfite:NaHSO3   0.5      max 0.5      max 0.5      max 0.5      max
Sodium carbonate: Na2CO3   0.6-2    max 0.6-2    max 0.6-2    max 0.6-2    max
Sodium formate: HCOONa   0.5      max 0.8     max 0.5      max 0.5      max

  CAS Registry Number:

7775-14-6
  Synonyms: ;Sodium dithionite hydrate;Sodium hydrosulphite;Sodium dithionite;disodium dithionite;
  Molecular Formula: Na2O4S2
  Molecular Weight: 174.1071
  Molecular Structure: 7775-14-6 Sodium hydrosulfite
  Hazard Symbols:  Xn:Harmful;
  Risk Codes: R22:;
R31:;
R7:;
  Safety Description: S26:;
S28A:;
S43E:;
S7/8:;

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