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Zinc dithionite

CAS 7779-86-4

Dithionous acid, zinc salt (1:1)

EPA and Census publish no US supply data for this chemical.

Molecular structure of 7779-86-4
1 Zn²⁺
US productionNot reported
Top sourceNo public record

This chemical is listed as active in US commerce, but no company reported it to EPA’s survey for 2019 or 2023. Sites may have made or imported less than the threshold amount, or none.

Why supply is unknown

Where It Comes From

Customs basis: HS 283190 · narrow

EPA and Census publish no US supply data for this chemical.

HS customs code 283190 covers 2 tracked chemicals in total. US Census does not break out this chemical's share, so the country-of-origin mix is not available. EPA CDR reports import dependency at the chemical level separately, shown above.

Why It Matters

No EPA sector or FDA product records name a use for this chemical.

Chemical Identity

CAS7779-86-4
PubChem CIDNot recorded
DTXSIDDTXSID00894224
FormulaO4S2Zn
Mol. Weight193.5 g/mol
SMILES[Zn++].[O-]S(=O)S([O-])=O

Data Sources

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Brief citations

Zinc dithionite (CAS 7779-86-4) https://chemicalindependence.com/chemical/7779-86-4/ EPA TSCA Inventory: CAS 7779-86-4. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory