Trimethoxysilylpropanethiol
Also known as: (3-Mercaptopropyl)trimethoxysilane, 3-Mercaptopropyltrimethoxysilane, γ-Mercaptopropyltrimethoxysilane, 3-(Trimethoxysilyl)-1-propanethiol, 3-(Trimethoxysilyl)propanethiol, 1-Propanethiol, 3-(trimethoxysilyl)-, A-189, KBM-803, KBE-803, GF-70, Z-6062, SH-6062, Pros-196, M8500, CM8500
Trimethoxysilylpropanethiol (CAS 4420-74-0) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C6H16O3SSi and a molecular weight of 196.340 g/mol. Key properties include a melting point of <-50ºC, a boiling point of 198.0±0.0 °C at 760 mmHg, a density of 1.0±0.1 g/cm3 and a flash point of 48.9±0.0 °C. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed, H317 — May cause an allergic skin reaction and H411 — Toxic to aquatic life with long lasting effects. No supplier offers are currently listed; request a quote. Record last updated Nov 3, 2026.
- CAS No.
- 4420-74-0
- Jingsj CID
- J-18767-7
- Molecular Formula
- C6H16O3SSi
- Molecular Weight
- 196.340 g/mol
- Category
- Aliphatic Hydrocarbons
- Last updated
- 11/3/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | <-50ºC |
|---|---|
| Boiling Point | 198.0±0.0 °C at 760 mmHg |
| Density | 1.0±0.1 g/cm3 |
| Flash Point | 48.9±0.0 °C |
| Exact Mass | 196.058945 |
| PSA | 66.49000 |
| LogP | 1.09 |
| Vapor Pressure | 0.5±0.3 mmHg at 25°C |
| Refractive Index | 1.439 |
| Additional Property | decomposes |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- H317 — May cause an allergic skin reaction
- H411 — Toxic to aquatic life with long lasting effects
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 Trimethoxysilylpropanethiol?
The CAS number of Trimethoxysilylpropanethiol is 4420-74-0.
What are the molecular formula and molecular weight of Trimethoxysilylpropanethiol?
Trimethoxysilylpropanethiol has molecular formula C6H16O3SSi and molecular weight 196.340 g/mol.
Is Trimethoxysilylpropanethiol hazardous?
Trimethoxysilylpropanethiol has GHS signal word Warning and hazard statements H302 — Harmful if swallowed; H317 — May cause an allergic skin reaction; H411 — Toxic to aquatic life with long lasting effects.
What are the upstream and downstream products of Trimethoxysilylpropanethiol?
For Trimethoxysilylpropanethiol, Upstream Products: (3-Bromopropyl)trimethoxysilane, 3-Chloropropyltrimethoxysilane, Allyltrimethoxysilane; Downstream Products: Diethyl hydrazodicarboxylate, 3-Mercaptopropyltriethoxysilane.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Trimethoxysilylpropanethiol (CAS 4420-74-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-18767-7 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.