Sodium hydrosulfite

• Post Date:

  May 13,2025

• Expiry Date:

  Nov 09,2025

• 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:

  

• Hazard Symbols:

   Xn:Harmful;
  

• Risk Codes:

  R22:;
  R31:;
  R7:;
  

• Safety Description:

  S26:;
  S28A:;
  S43E:;
  S7/8:;
  

• Company:

  Shandong Weigorge Import and Export Co., Ltd.     [ China ]          

• Contact:

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• Email:

  weigorge@163.com