Caprylyl Methicone
AKA “17955-88-3, 1, 3, 5, 5-Heptamethyl-3-octyltrisiloxane, Caprylyl trisiloxane, Trisiloxane, 5-heptamethyl-3-octyl-, EINECS 241-881-3, Q95M2P1KJL, heptamethyloctyltrisiloxane, octylheptamethyltrisiloxane, SILSOFT 034”
Synthetic
Ingredient Facts
Caprylyl methicone
AKA: 17955-88-3, 1, 3, 5, 5-Heptamethyl-3-octyltrisiloxane, Caprylyl trisiloxane, Trisiloxane, 5-heptamethyl-3-octyl-, EINECS 241-881-3, Q95M2P1KJL, Heptamethyloctyltrisiloxane, Octylheptamethyltrisiloxane, SILSOFT 034
Synthetic · Emollient · EWG: 2
Synthetic
Emollient
Skin Conditioner
Silicone
Plant Oil
Synthetic
Clean
The Expert Panel for Cosmetic Ingredient Safety concluded that the following 30 dimethicone, methicone, and substituted-methicone polymers are safe in cosmetics in the present practices of use and concentration described in this safety assessment when formulated to be non-irritating, with the exception that the available data are insufficient to make a determination of safety for use of these ingredients in products that may be incidentally inhaled when applied using airbrush devices: Caprylyl Methicone
Formula
C15H38O2Si3
Mol. Weight
334.72
CAS #
17955-88-3
Form
Liquid
State
Liquid
See origin →
Functions
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Conditions Skin
Softens & Smooths
Traditional Use
Unable to identify—this is not an ingredient name.
Skin Types
●all-skin-types
Best For
General
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR