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Example of using our Dithionites

General information

Dithionite is used in conjunction with complexing agents (e.g. citric acid) to reduce iron(III) oxy-hydroxide to soluble iron(II) compounds and to remove amorphous iron(III)-containing mineral phases in soil analyses.

Areas of application

Due to its reducing effect, sodium dithionite is used as a bleaching agent in stain removers, as well as for bleaching sugar and syrup. It is also used to separate silver from fixing baths.

In electroplating, sodium dithionite is used as a reducing agent in waste water treatment.

An important area of application for sodium dithionite is the textile industry. Here it serves as a reducing agent in vat dyeing, e.g. in indigo dyeing.

Use of sodium dithionite in the indigo dyeing of denim

Selected branches of industry

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Products by MCAS

Discover our Dithionites


Sodium dithionite
    • Formula: Na2O4S2
    • Molecular mass: 174.11 g/mol
    • CAS-No.: 7775-14-6
    • EINECS-No.: 231-890-0
    • RID / ADR: UN 1384 4.2/PG 2
    • WGK: N/A
      • Hazard statements: H251-H302-H319
      • Precautionary statements: P235-P264-P270-P280-P301+P312-P305+P351+P338
Sodium dithionite
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Advice by MCAS

Use our advise for Dithionites

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