3-Mercaptopropyltrimethoxysilane (CAS 4420-74-0) — formula C6H16O3SSi, molecular weight 196.34; category specialty chemicals.
3-Mercaptopropyltrimethoxysilane (CAS 4420-74-0) is a specialty chemicals. Its molecular formula C6H16O3SSi comprises 6 C, 16 H, 3 O, 1 S, 1 Si atoms. Its molecular weight is about 196.34. Specialty chemicals are developed for specific functional scenarios, emphasizing performance, purity and customized supply. Serving electronics chemicals, water treatment, new-energy materials, oilfield additives, plastic additives, enzymes and high-performance materials where specifications are critical. As a sourcing and distribution partner we help locate and compare this item across domestic and cross-border channels, arranging samples and batch orders with full COA and compliance files.
| CAS Number | 4420-74-0 |
|---|---|
| Molecular Formula | C6H16O3SSi |
| Molecular Weight | 196.34 |
| Applications | coupling agent in polysulfide and polyurethane caulks and sealants, Adhesion, cohesion promoter, Binder, U.S. Production: 2023: 75, Rubber Product Manufacturing |
| Category | Specialty Chemicals |
Documented applications: coupling agent in polysulfide and polyurethane caulks and sealants, Adhesion, cohesion promoter, Binder, U.S. Production: 2023: 75, Rubber Product Manufacturing.
3-Mercaptopropyltrimethoxysilane is a specialty compound with CAS registry number 4420-74-0 and molecular formula C6H16O3SSi (molecular weight 196.34), belonging to the specialty chemicals segment of chemical raw materials.
CAS number: 4420-74-0
Its molecular formula C6H16O3SSi comprises 6 C, 16 H, 3 O, 1 S, 1 Si atoms.
Also known as: 3-Mercaptopropyltrimethoxysilane · 巯基丙基三甲氧基硅烷 · Mercaptopropyltrimethoxysilane · Trimethoxysilylpropanethiol
Category: specialty chemicals
The CAS registry number of 3-Mercaptopropyltrimethoxysilane is 4420-74-0.
Molecular formula C6H16O3SSi, molecular weight 196.34.
It is also registered under: 3-Mercaptopropyltrimethoxysilane, 巯基丙基三甲氧基硅烷, Mercaptopropyltrimethoxysilane, Trimethoxysilylpropanethiol.
Recorded applications: coupling agent in polysulfide and polyurethane caulks and sealants, Adhesion, cohesion promoter, Binder, U.S. Production: 2023: 75, Rubber Product Manufacturing.
Category: Specialty Chemicals.
Packaging is agreed per order, from lab-scale packs to bulk, and confirmed with each order rather than fixed on the page. A Certificate of Analysis (COA) ships with every batch and MSDS is available; where the end use carries a regulatory limit (food contact, pharmaceutical or cosmetic), state the standard at enquiry and the grade is set against it.
Independent reference data for 3-Mercaptopropyltrimethoxysilane (CAS 4420-74-0), compiled from public chemistry databases.
| CAS Number | 4420-74-0 |
|---|---|
| PubChem CID | 20473 |
| Molecular Formula | C6H16O3SSi |
| IUPAC Name | 3-trimethoxysilylpropane-1-thiol |
| UNII (FDA) | 8CB1M08OIW |
| Molecular Weight | 196.34 |
|---|---|
| Hydrogen Bond Donor Count | 1 |
| Hydrogen Bond Acceptor Count | 4 |
| Rotatable Bond Count | 6 |
| Exact Mass | 196.05894208 |
| Monoisotopic Mass | 196.05894208 |
| Topological Polar Surface Area | 28.7 |
| Heavy Atom Count | 11 |
| Density | 1.015 @25 °C |
|---|
4420-74-0; (3-Mercaptopropyl)trimethoxysilane; 3-Mercaptopropyltrimethoxysilane; 3-(Trimethoxysilyl)propanethiol; 1-Propanethiol, 3-(trimethoxysilyl)-; Silquest A 189; 3-(Trimethoxysilyl)-1-Propanethiol; Prosil 196; Silane A 189; (3-Thiopropyl)trimethoxysilane; NUCA 189; 3-(Sulfanylpropyl)trimethoxysilane; M 8500 (coupling agent); 3-(Trimethoxysilyl)propyl mercaptan; A 189 (silicone); KBE 803
| GHS notifications | 4.4% (21 / 481) |
|---|
| GHS notifications | 4.4% (21 / 481) |
|---|---|
| Notified hazard statements | H302 (94%), H312 (12.5%), H317 (71.7%), H319 (10.4%), H411 (64.7%) |
Source: PubChem / Wikidata; the batch COA governs where values differ.
Supplier: Jinan Shenghe Chemical Co., Ltd.
中文页面: 3-巯基丙基三甲氧基硅烷