A polyether compound produced by copolymerizing ethylene oxide (6 units) and propylene oxide (2 units) with propylheptyl alcohol. Functions as a lightweight solvent and skin-conditioning agent that enhances spreadability, reduces tackiness, and improves the sensory profile of cosmetic formulations. Commonly used in serums, toners, and light emulsions.
Key Skin Benefits
+ Improves spreadability — helps products glide smoothly on skin
+ Reduces tackiness of gel and serum formulations — improves sensory feel
+ Acts as a solubilizer — helps dissolve oil-soluble ingredients in water-based systems
Pros
+ Generally well-tolerated — CIR-reviewed as safe for cosmetic use in PEG/PPG class
+ Non-comedogenic — does not clog pores
+ Lightweight conditioning — does not leave a greasy or heavy film
+ Good compatibility — works well in both aqueous and emulsion systems
Cons
− Limited independent research — most safety data from CIR panel review of the class
− Synthetic origin — not suitable for natural/organic formulations
− PEG-containing — trace 1,4-dioxane possible if poorly purified (rare in reputable cosmetics)
Specifications
Property
Value
Usage Areas
Face, Eye, Body
Product Type
Leave-On, Rinse-Off
Source
Synthetic
Natural Level
Synthetic
Safety Ratings
Metric
Rating
Skin Sensitivity
1/5 (very low)
Comedogenic Rating
0/5
EWG Score
1/10
Regional Regulatory Limits
Region
Leave-on %
Rinse-off %
Status
EU (CosIng)
No limit
No limit
Allowed
US (CIR/FDA)
No limit
No limit
Allowed
Japan (MHLW)
No limit
No limit
Allowed
ASEAN
No limit
No limit
Allowed
China (NMPA)
No limit
No limit
Allowed
Typical Usage % by Product Type
Product Type
Typical %
Toners / mists
0.5-3%
Serums / essences
0.5-2%
References
CIR (Cosmetic Ingredient Review) — Safety Assessment of PEG and PEG Derivatives as Used in Cosmetics. Published in International Journal of Toxicology.
CosIng (2025) — European Commission Cosmetic Ingredient Database. https://ec.europa.eu/growth/tools-databases/cosing/
EWG Skin Deep — Cosmetic Ingredient Hazard Score. https://www.ewg.org/skindeep/
Personal Care Products Council (PCPC) — INCI Monograph and Safety Data.