Agent Name

Ethyltriacetoxysilane

CAS Number

17689-77-9

Formula

C8-H14-O6-Si

Major Category

Metals

Synonyms

Silanetriol, 1-ethyl-, 1,1,1-triacetate; Silanetriol, ethyl-, triacetate; Triacetoxyethylsilane; [ChemIDplus] Ethylsilanetriol, triacetate; Tris(acetyloxy)ethylsilane; [Reference #1]

Category

Metalloid Compounds (Silicon)

Description

Off-white liquid with an odor of acetic acid; mp = 8.4 deg C; [OECD SIDS: IUCLID Data Set] Colorless liquid; mp = 7-9 deg C; [Alfa Aesar MSDS]

Sources/Uses

Used as a cross-linker for silicone sealants and adhesives available in consumer, industrial, and construction markets; [Reference #1]

Comments

Oral LD50 (rat) = 380 mg/kg; [ToxPlanet: EPA - TSCATS] Acetic acid and sodium acetate demonstrate no evidence of toxicity to fertility or teratogenicity; [Reference #1] No human exposure from use in silicone sealants due to the nature of the curing process; Rapidly hydrolyzed by moisture/water forming acetic acid and the corresponding trisilanol (toxicity expected primarily from acetic acid); Severely irritating and corrosive to skin; [Reference #1] Hydrolyzed by water; Causes burns; Inhalation may cause corrosive injuries to upper respiratory tract and lungs; [Alfa Aesar MSDS] See "Acetic acid."

Reference Link

OECD SIDS: Ethyltriacetoxysilane - 2005

Exposure Assessment
Vapor Pressure

0.04 mm Hg

Adverse Effects
Toxic Pneumonitis

Yes

Dermatotoxin

Skin Burns

Links to Other NLM Databases
Toxicity Information

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Chemical Information

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Other Information

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