How we scored it
Dextran backbone (glucose polymer, bacterial fermentation of sucrose) natural per gums/starches rule; O-SO3Na ester groups = mineral sulfate, also natural per this site's convention. 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
Dextran sulfate is dextran (a glucose polysaccharide made by fermenting sucrose with Leuconostoc bacteria) reacted with a sulfating agent to attach sulfate ester groups. Both the sugar backbone and the sulfate groups are treated as natural-origin under the site's mineral-salt convention.
In plain English
A modified sugar polymer made by fermenting sucrose with bacteria, then adding sulfate groups. It's used as a conditioning and binding agent. Derived from natural sugar fermentation.
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.
- 2DEXTRAN SULFATE. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 3DEXTRAN SULFATE. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=DEXTRAN%20SULFATE