CAS Registry Number

CAS 7775-14-6 — Sodium hydrosulfite

CAS 7775-14-6 NaO2SSO2Na MW 174.11

Sodium hydrosulfite (Na₂S₂O₄) is a powerful reducing agent widely used in photography, textile dyeing, and wastewater treatment to decolorize and neutralize oxidizing agents. It’s also employed in food processing as a preservative (E223) and in chemical synthesis. CAS 7775-14-6, molecular formula Na₂S₂O₄, molecular weight 174.11 g/mol. Store at 2–8°C under dry conditions. Signal word: *Danger*—irritant, may cause skin and eye irritation; avoid moisture exposure. Molekula supplies sodium hydrosulfite from research to bulk quantities with full documentation and ISO 9001:2015 traceability.

Also known as: Sodium dithionite

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Molekula products for CAS 7775-14-6

Sodium hydrosulfite

SKU 90032540

Made to order Uncategorised

Sodium dithionite

SKU 32979727

Made to order

Molekula has supplied fine chemicals and biochemicals since 2000 from ISO 9001:2015 and ISO 14001:2015 certified facilities. Every dispatched batch is logged with a batch number and matched to a Certificate of Analysis, and Safety Data Sheets are available in five languages.