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TRIETHOXYCAPRYLYLSILANE

Last update on Jun 12, 2026

Triethoxycaprylylsilane is a clear-to-yellow liquid that functions as a binder, skin conditioning agent, and surface modifier in cosmetics. It is used to coat pigments used in cosmetics and personal care products. Triethoxycaprylylsilane contains a Si-O bond that can be readily hydrolyzed in the presence of moisture, making this compound very reactive.

CAS Number: 2943-75-1Chem/IUPAC Name: Triethoxy(octyl)silaneEINECS/ELINCS No: 220-941-2COSING REF No: 59822

Products with TRIETHOXYCAPRYLYLSILANE

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Sunsafe® Z801R

by Uniproma Chemical

INCI: CI 77947 | TRIETHOXYCAPRYLYLSILANE

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Sunsafe® Z201R

by Uniproma Chemical

INCI: CI 77947 | TRIETHOXYCAPRYLYLSILANE

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BlossomGuard® TCR

by Uniproma Chemical

INCI: CI 77891 | SILICA | TRIETHOXYCAPRYLYLSILANE

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What is TRIETHOXYCAPRYLYLSILANE used for?

Cosmetic products: It functions as a binding agent and emulsion stabilizer. It is used to coat and stabilize pigments used in cosmetics to promote their spreadability on the skin. It is used up to 2.5% in eye shadow, 1% in lipstick, 0.021% in body and hand sprays and up to 0.011% in perfumes
Sun care: It is used to coat the mineral sunscreen actives for aesthetic purposes and also reduces oxidative stress when used in sunscreen formulations

Origin

Triethoxycaprylylsilane belongs to a class of compounds called alkoxyl alkyl silanes and can be synthesized by the hydrosilation of 1-octene with triethoxysilane and a platinum catalyst.

What does TRIETHOXYCAPRYLYLSILANE do in a formulation?

BINDING|

SKIN PROTECTING

Safety Profile

Triethoxycaprylylsilane is not restricted from use in any way under the rules governing cosmetic products in the European Union. The Scientific Committee on Consumer Safety (SCCS) concluded that triethoxycaprylylsilane can safely be used to coat sunscreen actives. The Cosmetics Ingredient Review (CIR) Expert Panel also concludes it to be safe in cosmetics in the appropriate concentrations. However, since it has a silicone base, consumers should consider the warnings associated with all silicone ingredients. If silicone is able to enter the body (although applied topically, this is unlikely due to the large molecule size), it can degrade into silica, a toxic, carcinogenic substance, that can damage the immune system, and may also allow toxic substances to enter into the skin.