Silicone Fluids & Oils Available to Source

Polyether-Modified Trisiloxane (Silicone Surfactant)

CAS 27306-78-1 · MF C13H34O4Si3 · MW 338.66 g/mol

Polyether-Modified Trisiloxane (CAS: 27306-78-1) is a silicone surfactant with the molecular formula C13H34O4Si3 that provides emulsification and wetting properties in industrial formulations. This compound is utilized across agriculture, beauty & personal care, HI&I cleaning, plastics & polymers, and textile applications where surface tension reduction and emulsion stability are required.

SDS / TDS Download
CAS Number
27306-78-1
Molecular Formula
C13H34O4Si3
Molecular Weight
338.66 g/mol
Material Family
Silicone Fluids & Oils
GHS / SDS Safety Warning
Environmental Hazard Irritant
  • H312 (14.7%): Harmful in contact with skin [Warning Acute toxicity, dermal]
  • H315 (11.7%): Causes skin irritation [Warning Skin corrosion/irritation]
  • H332 (88.6%): Harmful if inhaled [Warning Acute toxicity, inhalation]
  • H302 (14.3%): Harmful if swallowed [Warning Acute toxicity, oral]
  • H319 (90.9%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]
  • H411 (87.5%): Toxic to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard]
Chemical Identity
CAS Number27306-78-1
IUPAC Name3-(2-methoxyethoxy)propyl-methyl-bis(trimethylsilyloxy)silane
InChI KeyJQRXTVACLHSVTF-UHFFFAOYSA-N
PubChem CID 197160
INCI NamePEG-8 TRISILOXANE
Synonyms & Trade Names
3-(2-methoxyethoxy)propyl-methyl-bis(trimethylsilyloxy)silane RefChem:491129 Silwet L 77 C13H34O4Si3 2-[Methoxy(polyethyleneoxy)propyl]heptamethyl-trisiloxane Tech grade 90% 3-(3-(2-Methoxyethoxy)propyl)-1,1,1,3,5,5,5-heptamethyltrisiloxane
Full Description

Polyether-Modified Trisiloxane (CAS: 27306-78-1) is a silicone surfactant with the molecular formula C13H34O4Si3 that provides emulsification and wetting properties in industrial formulations. This compound is utilized across agriculture, beauty & personal care, HI&I cleaning, plastics & polymers, and textile applications where surface tension reduction and emulsion stability are required.