Database/Emulsifying Surfactant/C11-15 Pareth-9
100% petroleum · ISO 16128

Is C11-15 Pareth-9 natural?

No. The C11-15 alcohol is an odd-and-even-carbon blend made from petrochemical olefins or paraffins, not a coconut or palm fatty alcohol, so neither the alcohol nor the ethylene-oxide chain counts as natural. Same ruling as C12-15 Alcohols and the C12-15 Pareths.

INCI nameC11-15 Pareth-9
CAS173244-48-9
FunctionEmulsifying Surfactant · Cleansing Surfactant
FeedstockPetrochemical C11-15 alcohols ethoxylated with about 9 units…

How we scored it

C11-15 secondary or oxo alcohols from petrochemical paraffins and olefins + 9 EO (9×44.05 = 396.5 Da, petrochemical ethylene oxide) → 0/total = 0.0.
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

Petrochemical C11-15 alcohols ethoxylated with about 9 units of ethylene oxide.

In plain English

A cleansing and emulsifying ingredient made from fatty alcohols reacted with ethylene oxide, a petrochemical. Helps products foam, clean and blend oil with water.

CosIng definition: Alcohols, C11-15, ethoxylated (9 mol EO average molar ratio)

Natural alternatives with the same function

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 C10-16 Alkyl Glucoside 100% natural origin

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 C12-20 Alkyl Glucoside 100% natural origin

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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. 2C11-15 PARETH-9. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  3. 3C11-15 PARETH-9. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=C11-15%20PARETH-9