Database/Antioxidant/Sodium Bisulfite
100% natural origin · ISO 16128

Is Sodium Bisulfite natural?

Yes. A simple inorganic mineral salt of sodium and bisulfite, both mineral-derived; contains no petrochemical carbon.

INCI nameSodium Bisulfite
CAS7631-90-5
FormulaHNaO3S · 104.06 Da
FunctionAntioxidant · Hair Waving Or Straightening
FeedstockSodium bisulfite is manufactured by absorbing sulfur dioxide,…

How we scored it

NaHSO3: Na (natural mineral counter-ion) + HSO3 (natural mineral bisulfite, analogous to sulfate). No carbon in molecule. 1.0.
What counts. ISO 16128-2 scores the atoms that remain in the final ingredient. Reagents, solvents, catalysts and protecting groups used during manufacture leave no mass behind and are not counted.

Where it comes from

Sodium bisulfite is manufactured by absorbing sulfur dioxide, from mineral sulfur sources, into sodium hydroxide or soda ash solution. Both the sodium and sulfite portions are mineral, natural origin.

In plain English

A mineral salt used as an antioxidant, preservative and reducing agent, including in hair-waving products. It is manufactured entirely from mineral, inorganic sulfur and sodium sources.

CosIng definition: Sodium Bisulfite is the inorganic salt that conforms to the formula:

Structure

2D structure of Sodium Bisulfite

sodium hydrogen sulfite

PubChem CID 23665763 ↗

References

  1. 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.
  2. 2Sodium Bisulfite. PubChem CID 23665763. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3SODIUM BISULFITE. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4SODIUM BISULFITE. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=SODIUM%20BISULFITE