Database/Emulsifying Surfactant/Deceth-5
Mostly petroleum · ISO 16128

Is Deceth-5 natural?

Mostly not. Decyl fatty alcohol is oleochemical; the 5 ethylene-oxide units are petrochemical per this site's convention.

INCI nameDeceth-5
CAS26183-52-8
FunctionEmulsifying Surfactant · Cleansing Surfactant
FeedstockMade by ethoxylating oleochemical decyl alcohol with ethylene…

How we scored it

CosIng text states 5 mol EO average; given formula (C12H26O2/202.33) matches only 1 EO, a PubChem mismatch, disregarded. Decanol 158.3 Da (natural) + 5x44.05 EO 220.3 Da (petrochemical) = 378.5 Da -> 0.42.
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

Made by ethoxylating oleochemical decyl alcohol with ethylene oxide to an average of 5 mol EO. Ethylene oxide is petrochemical; a petrochemical (oxo) decanol source is also possible, which would lower the value.

In plain English

An emulsifier made by reacting decyl alcohol, a fatty alcohol that can come from coconut oil, with ethylene oxide, a petroleum-derived chemical. Helps blend oil and water in cleansers.

CosIng definition: Decanol, ethoxylated (5 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. 2DECETH-5. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  3. 3DECETH-5. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=DECETH-5