INCI ingredient

Sodium Sulfite

Sodium Sulfite appears on 136 ingredient lists in our database, most often in hair dyes.

What it triggers

Sodium Sulfite appears on 136 ingredient lists in our database, most often in hair dyes.

It does not belong to any of the six groups we check, so it never changes a verdict.

We have not written the plain-language note for this ingredient yet; the facts above come straight from how it is classified.

Functions: antioxidant, hair waving or straightening, reducing

in 136 products

Showing 24 of 136 products with this ingredient, most scanned first.

Functions listed by CosIng

antioxidant: Inhibiting reactions promoted by oxygen, thus avoiding oxidation and rancidity.
hair waving or straightening: Modifying the chemical structure of the hair, allowing it to be set in the style required (permanent waves or hair straightening).
reducing: Changing the chemical nature of another ingredient by adding hydrogen (or removing oxygen).

CAS 7757-83-7 · EC 231-821-4

EU regulation

Listed in Annex V (ref. 9) of the EU Cosmetics Regulation, maximum concentration 0.2% (as free SO2). III/99 V/9

Source: CosIng, European Commission. Informative, no legal value; the regulation text is the reference.

Classification from the INCI name; product lists from Open Beauty Facts.Report a mistake