Quick answer
Used as a preservative and stabilizer in cosmetic formulations; Also offers antioxidant properties; In hair care, it acts as a reducing agent that alters the structure of hair; Described as colorless crystals or a white to yellowish crystalline powder in raw material form
Sodium Metabisulfite
Updated
Disodium disulphite
Purpose
Plays a multitasking role as a preservative, stabilizer, and antioxidant.
Rating
AVERAGE
Category
Preservative, Antioxidant, Irritant
INCI Purpose
ANTIOXIDANT, PRESERVATIVE, REDUCING
Alternative Names
At a Glance
Used as a preservative and stabilizer in cosmetic formulations
Also offers antioxidant properties
In hair care, it acts as a reducing agent that alters the structure of hair
Described as colorless crystals or a white to yellowish crystalline powder in raw material form
Article
Sodium metabisulfite is used as a preservative and stabilizer in cosmetic formulations. This synthetic ingredient also offers antioxidant properties. In hair care, it functions as a reducing agent that alters the structure of hair.
Suppliers of sodium metabisulfite describe it as colorless crystals or a white to yellowish crystalline powder in its raw material form.
In 2013 the Cosmetic Ingredient Review Expert Panel deemed sodium metabisulfite safe as used in cosmetic formulations (their report looked at skin care products using less than 1% concentrations). Its safety status was reaffirmed in 2020.
Research indicates those with allergies/sensitivities to sulfite ingredients should be aware of potential sensitization to sodium metabisulfite.
References