How we scored it
Where it comes from
Made by absorbing sulfur dioxide (from mineral sulfur or metal sulfides) into synthetic ammonia solution. The ammonia component follows the same natural-gas-derived convention as urea and allantoin.
In plain English
A preservative and reducing agent used in hair-waving/straightening products and as an antioxidant that helps stabilise formulas.
CosIng definition: Ammonium Bisulfite is an inorganic salt that conforms to the formula:
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Structure
azanium hydrogen sulfite
References
- 1ISO 16128-1:2016 and ISO 16128-2:2017 — Guidelines on technical definitions and criteria for natural and organic cosmetic ingredients and products. ISO, Geneva.
- 2Ammonium Bisulfite. PubChem CID 10441651. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
- 3AMMONIUM BISULFITE. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 4AMMONIUM BISULFITE. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=AMMONIUM%20BISULFITE