Preservative

Sodium Bisulfite

INCI: SODIUM BISULFITE
CAS 7631-90-5 EC 231-548-0
Sodium hydrogensulphite
Generally Safe
This ingredient has a good safety profile based on available data.
Purpose

Function

Preservative, reducing agent, hair waving/straightening agent
Profile

Properties

Silicone
Silicone free
Malassezia
Safe
Fungal Acne
Safe
Details

Description

Sodium hydrogensulphite

EU Restricted — Annex III
1 official EU restriction with concentration limits & label requirements
View details →
Reference

Identifiers

CAS Number
7631-90-5
EC Number
231-548-0
INCI
SODIUM BISULFITE
Category
Preservative
Updated
Apr 2, 2026