Phenyl Trimethicone
AKA “1, 5, 5-Hexamethyl-3-phenyl-3-(trimethylsilyloxy)trisiloxane, DTXSID6051857, RefChem:1051654, DTXCID9030414, 2116-84-9, Phenyltris(trimethylsiloxy)silane, 5-hexamethyl-3-phenyl-3-((trimethylsilyl)oxy)trisiloxane, Tris(trimethylsiloxy)phenylsilane, trimethyl-[phenyl-bis(trimethylsilyloxy)silyl]oxysilane, MFCD00053665
Skin Conditioning
Ingredient Facts
Phenyl trimethicone
AKA: 1, 5, 5-Hexamethyl-3-phenyl-3-(trimethylsilyloxy)trisiloxane, DTXSID6051857, RefChem:1051654, DTXCID9030414, 2116-84-9, Phenyltris(trimethylsiloxy)silane, 5-hexamethyl-3-phenyl-3-((trimethylsilyl)oxy)trisiloxane, Tris(trimethylsiloxy)phenylsilane, Trimethyl-[phenyl-bis(trimethylsilyloxy)silyl]oxysilane, MFCD00053665
Skin Conditioning · Antifoaming · EWG: 1
Synthetic
Skin Conditioner
Hair Care
Silicone
Clean
1,1,5,5,5-Hexamethyl-3-phenyl-3-[(trimethylsilyl)oxy]trisiloxane
Formula
C15H32O3Si4
Mol. Weight
372.75
CAS #
2116-84-9
Form
Liquid
State
Liquid
See origin →
Functions
Antifoaming
Hair Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Locks in moisture
Traditional Use
Developed as an advanced silicone polymer in the late 20th century to provide superior sensory benefits and film-forming properties in cosmetics. Designed to replace heavier silicones while maintaining conditioning and protective functions.
Skin Types
all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR