Database/Hair Conditioning/PPG-33 Butyl Ether
100% petroleum · ISO 16128

Is PPG-33 Butyl Ether natural?

No. Butanol is a petrochemical alcohol made from propylene by the oxo process, and every oxypropylene unit comes from petrochemical propylene oxide.

INCI namePPG-33 Butyl Ether
CAS9003-13-8
FunctionHair Conditioning · Skin Conditioning
FeedstockSynthetic n-butanol is reacted with petrochemical propylene oxide…

How we scored it

n-Butanol C4H10O 74 + 33 propylene oxide units (33 x 58 = 1,917) = 1,991 Da. All petrochemical; natural 0 / 1,991 = 0.00.
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

Synthetic n-butanol is reacted with petrochemical propylene oxide under base catalysis to give a chain averaging 33 units. Bio-butanol exists but is not a significant supply route for this grade.

In plain English

A liquid made by attaching a chain of about 33 propylene oxide units to butyl alcohol. It is used in small amounts to condition hair and skin. Both raw materials come from petrochemicals.

CosIng definition: Polyoxypropylene (33) butyl ether

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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. 2PPG-33 BUTYL ETHER. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  3. 3PPG-33 BUTYL ETHER. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=PPG-33%20BUTYL%20ETHER