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Sodium Formaldehyde Bisulfite (Sodium Hydroxymethanesulfonate)

CAS 870-72-4 · Formula CH3NaO4S · MW 134.09 g/mol

A formaldehyde-bisulfite adduct delivering controlled reducing power for textile and mineral-processing operations. Used as a reducing and stripping agent in textile dyeing, as a developer component in photography, and as a reagent in lead-zinc ore flotation.

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CAS Number
870-72-4
Formula
CH3NaO4S
Molecular Weight
134.09 g/mol
Material Family
Acids & Salts
At a Glance
Material Family
Acids & Salts
Record Type
Pure compound
Primary Role
Preservation · Biocidal Action
Functional Roles
SODIUM HYDROXYMETHANE SULFONATE
ANTIMICROBIALREDUCING
Applications & Use Cases
  • Textiles: Reducing and stripping agent in dyeing operations
  • Photography: Developer-solution component
  • Mineral processing: Flotation reagent for lead-zinc ores
  • Fibers: Fixing agent for keratin-containing fibers
Physical Properties
Boiling Point
Decomposes
Solubility
Soluble in water
Safety & Handling
Full SDS available on request

A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.

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Chemical Identity
CAS Number
870-72-4
Molecular Formula
CH3NaO4S
Molecular Weight
134.09 g/mol
IUPAC Name
sodium hydroxymethanesulfonate
INCI Name
SODIUM HYDROXYMETHANE SULFONATE
PubChem CID
InChI Key
UOULCEYHQNCFFH-UHFFFAOYSA-M
Synonyms & Trade Names
Sodium hydroxymethanesulfonate SODIUM FORMALDEHYDE BISULFITE Formaldehyde sodium bisulfite Formbis Sodium hydroxymethanesulphonate Hydroxymethanesulfonic acid monosodium salt Sodium formaldehydebisulfite Sodium hydroxymethylsulfonate Formaldehyde sulfite sodium salt Monosodium hydroxymethanesulfonate AI3-23356 Methanesulfonic acid, hydroxy-, sodium salt Formaldehyde-sodium bisulfite compound
Full Description

Sodium formaldehyde bisulfite (CAS 870-72-4), the formaldehyde-sodium bisulfite addition compound, also known as sodium hydroxymethanesulfonate. Used as a reducing and stripping agent in textile dyeing, as a developer component in photography, and as a reagent in lead-zinc ore flotation.

Frequently Asked Questions

What is formaldehyde sodium bisulfite used for?

Sodium formaldehyde bisulfite (CAS 870-72-4) is used as a reducing and stripping agent in textile dyeing, as a developer-solution component in photography, as a flotation reagent for lead-zinc ores, and as a fixing agent for keratin-containing fibers.

What is another name for sodium formaldehyde bisulfite?

It is also known as sodium hydroxymethanesulfonate, the formaldehyde–sodium bisulfite addition compound (CAS 870-72-4). It may also be referred to as a formaldehyde bisulfite adduct.

What is the chemical formula of sodium formaldehyde bisulfite?

The compound has the formula CH3NaO4S (CAS 870-72-4), corresponding to sodium hydroxymethanesulfonate, the addition product of formaldehyde and sodium bisulfite.

How is sodium formaldehyde bisulfite used in mineral processing?

It serves as a flotation reagent in the separation of lead-zinc ores, exploiting its reducing properties to modify mineral surfaces. Request the CoA for assay and the SDS for handling details before ordering.

How is bulk sodium formaldehyde bisulfite supplied?

It is supplied to textile, photographic-chemical, and mineral-processing operations as a powder or solution in bags or drums. Request a bulk quote with your target volume, plus the CoA and SDS.

Disclaimer. Information on this page — including properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem/ECHA, 49 CFR 172.101, the Harmonized Tariff Schedule). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot purchased governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information. Trademarks. Third-party trademarks and brand names are the property of their respective owners; any reference is nominative — used only to identify a comparable product — and does not imply affiliation with, sponsorship by, or endorsement by the trademark owner.