(4-Chlorophenyl)triethoxysilane

Also known as: (4-chlorophenyl)triethoxy-silane, (4-chlorophenyl)triethoxy-Silane, 1-chloro-4-(triethoxysilyl)benzene, 1-CHLORO-4-TRIETHOXYSILYLBENZENE, Benzene, 1-chloro-4-(triethoxysilyl)-, CHLOROPHENYLTRIETHOXYSILANE, Chlorophenyltriethoxysilane(mixed m.p isomers), EINECS 244-533-9, MFCD00053217, Silane, (4-chlorophenyl)triethoxy-, chlorophenyltriethoxysilane, p-chlorophenyltriethoxysilane

(4-Chlorophenyl)triethoxysilane (CAS 21700-74-3) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C12H19ClO3Si and a molecular weight of 274.816 g/mol. Key properties include a melting point of <0ºC, a boiling point of 272.5±23.0 °C at 760 mmHg, a density of 1.1±0.1 g/cm3 and a flash point of 99.4±14.7 °C. No supplier offers are currently listed; request a quote. Record last updated Nov 3, 2026.

CAS No.: 21700-74-3
Jingsj CID: J-6760-7
Molecular Formula: C₁₂H₁₉ClO₃Si
Molecular Weight: 274.816 g/mol
Category: Aromatic Hydrocarbons
Last updated: 11/3/2026

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Physicochemical Properties

Melting Point	<0ºC
Boiling Point	272.5±23.0 °C at 760 mmHg
Density	1.1±0.1 g/cm3
Flash Point	99.4±14.7 °C
Exact Mass	274.079193
PSA	27.69000
LogP	3.59
Vapor Pressure	0.0±0.5 mmHg at 25°C
Refractive Index	1.489

Customs & Trade Information

HS Code	2931900090
Summary	2931900090. other organo-inorganic compounds. VAT:17.0%. Tax rebate rate:13.0%. Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward). MFN tariff:6.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of (4-Chlorophenyl)triethoxysilane?

The CAS number of (4-Chlorophenyl)triethoxysilane is 21700-74-3.

What are the molecular formula and molecular weight of (4-Chlorophenyl)triethoxysilane?

(4-Chlorophenyl)triethoxysilane has molecular formula C12H19ClO3Si and molecular weight 274.816 g/mol.

What are the upstream and downstream products of (4-Chlorophenyl)triethoxysilane?

For (4-Chlorophenyl)triethoxysilane, Upstream Products: 1,4-Dichlorobenzene, Ethanol, 1-Chloro-4-iodobenzene; Downstream Products: 1-Chloro-4-fluorobenzene, 4-Chlorobenzonitrile, 4,4'-Dichlorobiphenyl.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 11/3/2026

How to cite: Jingsj. "(4-Chlorophenyl)triethoxysilane (CAS 21700-74-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-6760-7 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.