Database/Emulsifying Surfactant/PEG-5 Soyamine
Mostly natural · ISO 16128

Is PEG-5 Soyamine natural?

Mostly. Ethoxylated fatty amine. The soybean alkyl chain is natural; the amine nitrogen from synthetic ammonia and the 5 ethylene-oxide units are petrochemical.

INCI namePEG-5 Soyamine
CAS61791-24-0
FunctionEmulsifying Surfactant · Cleansing Surfactant
FeedstockSoybean fatty amine reacted with about 5 mol…

How we scored it

Soy alkyl (oleyl proxy) chain C18H35 251.5 Da (natural); nitrogen 14.0 Da (synthetic ammonia) + 5×EO 220.3 Da + 2 terminal H (petrochemical); total 487.8 Da → 0.52. Same method as the PEG-n Cocamine and Stearamine entries.
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

Soybean fatty amine reacted with about 5 mol of ethylene oxide.

In plain English

A soy-oil-derived fatty amine reacted with ethylene oxide, used as a surfactant in cleansers. Just over half its weight traces to soybean oil, the rest to petrochemical processing.

CosIng definition: Amines, soya alkyl, ethoxylated (5 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. 2PEG-5 SOYAMINE. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  3. 3PEG-5 SOYAMINE. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=PEG-5%20SOYAMINE