At a Glance
Material Family
Acids & Salts
Record Type
Salt
Primary Role
Synthesis Intermediate · Color / Pigmentation
Functional Roles
Industries Served
Applications & Use Cases
- ▸ Reducing agent for vat and sulfur dyes in textile dyeing, converting insoluble vat dyes to their soluble leuco form so they can penetrate cellulosic fibers before re-oxidation.
- ▸ Stripping and color-correction of mis-dyed or over-dyed fabric, where it discharges existing dye to allow re-dyeing without re-processing the textile.
- ▸ Brightening agent for mechanical pulp, deinked recycled fiber, and kaolin clay in paper and coating applications, reducing chromophores to raise brightness.
- ▸ Reductive precipitation and removal of dissolved heavy metals such as hexavalent chromium in industrial wastewater and process-water treatment.
- ▸ In-situ chemical reduction (ISCR) reagent for soil and groundwater remediation, reducing mobile contaminants to less soluble, immobilized forms.
Physical Properties
appearance
White to grayish-white crystalline powder
odor
Faint sulfurous (SO2-like) odor
melting_point
52 C (decomposes)
density
2.38 g/cm3
water_solubility
182 g/L (20 C)
ph
5.5-7.5 (saturated aqueous solution, typical)
assay
85-90% (typical commercial grade)
bulk_form
Anhydrous powder
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.
Chemical Identity
CAS Number
7775-14-6
Molecular Formula
Na2O4S2
Molecular Weight
174.11 g/mol
IUPAC Name
disodium;dithionite
PubChem CID
InChI Key
JVBXVOWTABLYPX-UHFFFAOYSA-L
Synonyms & Trade Names
Related Products
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.