Octadecyltriethoxysilane (Stearyl Triethoxysilane) is a chemical compound consisting of stearylic acid and silanes.

It appears as a white powder or colourless liquid.

 Incompatible with water, acids, strong oxidizing agents. Stable. Moisture sensitive.

What it is used for and where

Cosmetics

Surface Modifier

A substance that has the property of preventing surface defects in the epidermis by repelling oils and water and giving the skin greater resistance against blemishes. Provides the epidermis with the humectant properties of silanes and a soft skin feel by helping the formulation to adhere better to the skin.

The most relevant studies on this ingredient have been selected with a summary of their contents:

Stearyl Triethoxysilane studies

Caratteristiche tipiche del prodotto commerciale Stearyl Triethoxysilane powder

• Molecular Formula     C₂₄H₅₂O₃Si
• Molecular Weight      416.8
• Exact Mass   416.368561
• CAS  7399-00-0
• UNII    1VN9P25L8H
• EC Number   230-995-9    231-545-4
• DSSTox Substance ID  DTXSID90224778
• IUPAC  triethoxy(octadecyl)silane
• InChl=1S/C24H52O3Si/c1-5-9-10-11-12-13-14-15-16-17-18-19-20-21-22-23-24-28(25-6-2,26-7-3)27-8-4/h5-24H2,1-4H3
• InChl Key      FZMJEGJVKFTGMU-UHFFFAOYSA-N
• SMILES  CCCCCCCCCCCCCCCCCC[Si](OCC)(OCC)OCC
• MDL number  MFCD00039875
• PubChem Substance ID   329778430

Synonyms:

• n-Octadecyl Triethoxysilane
• Silane, triethoxyoctadecyl-
• Octadecyltriethoxysilane
• triethoxy(octadecyl)silane