Product Name: Sodium Pyrosulfite

Synonyms: Sodium pyrosulfite; Disodium disulphite; Disulfurous acid disodium salt; Pyrosulfurous acid disodium salt

Molecular Formula: Na2S2O5

Molecular Weight: 190.10

CAS No.: 7681-57-4

EINECS: 231-673-0

Description

Sodium pyrosulfite is an antioxidant based preservative used in cosmetics and skin care products to prevent bacterial and fungal contamination and prolong the shelf life of products.

Antioxidants help prevent product oxidation, a natural process that changes the composition and efficacy of oxygen when it absorbs electrons from ingredients in the formula.

Benefits

1. Sodium pyrosulfite acts as an antioxidant and preservative by protecting other components in the formula from oxidation. Adding an antioxidant preservative, such as sodium pyrosulfite, will make the product difficult to degrade when exposed to environmental elements and prevent the growth of bacteria and molds.

2. In addition to being used as antioxidant and preservative, sodium pyrosulfite can also be used as curling / straightening agent. It is usually used with sodium sulfite and sodium sulfate for straightening hair products and permanent waves. Other hair care products using sodium sulfite include bleach, hair dyes, pigments and colorants