Database/Emulsifying Surfactant/Oleth-3
Mostly natural · ISO 16128

Is Oleth-3 natural?

Mostly. Oleyl alcohol is an oleochemical fatty alcohol (natural); the 3 ethylene-oxide units are petrochemical by this site's convention.

INCI nameOleth-3
CAS9004-98-2
FunctionEmulsifying Surfactant
FeedstockOleyl alcohol, a C18 fatty alcohol typically from…

How we scored it

Oleyl alcohol C18H36O 268.5 Da (natural) + 3 EO 132.2 Da (petrochemical) = 400.6 Da; 268.5/400.6 = 0.67.
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

Oleyl alcohol, a C18 fatty alcohol typically from olive, sunflower or tallow oleochemistry, is ethoxylated with about 3 moles of petrochemical ethylene oxide. Petrochemical Ziegler/oxo oleyl alcohol also exists as a minor supplier route.

In plain English

An emulsifier that helps mix oil and water in creams and lotions. It's made from a plant/animal-derived fatty alcohol reacted with a small amount of ethylene oxide, a petroleum-based building block.

CosIng definition: Poly(oxy-1,2-ethanediyl), .alpha.-9-(Z)-octadecenyl-.omega.-hydroxy (3 mol EO average molar ratio)

Natural alternatives with the same function

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. 2OLETH-3. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  3. 3OLETH-3. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=OLETH-3