(3-Mercaptopropyl) trimethoxysilane, 95%

Name: (3-Mercaptopropyl) trimethoxysilane, 95%
Brand: Vaqora Chemicals
SKU: VQ-018328

About (3-Mercaptopropyl) trimethoxysilane, 95%

Listed under CAS 4420-74-0, (3-Mercaptopropyl) trimethoxysilane is an electronic material available from Vaqora Chemicals, specified at 95% purity. Its molecular formula is C6H16O3SSi and its molecular weight is 196.34 g/mol. Systematically, it is named 3-trimethoxysilylpropane-1-thiol. Alternative names: 3-(Trimethoxysilyl)-1-propanethiol and (3-Mercaptopropyl)trimethoxysilane.

The material typically appears as a colourless liquid. Keep containers tightly closed in a cool, well-ventilated area away from heat and ignition sources. It carries the GHS signal word “Warning” with 5 hazard statements. Review the Safety Data Sheet before use.

Typical applications include semiconductor research, electronic devices and thin films. It is used across academic and industrial research and electronics and semiconductors.

Standard pack sizes are 25 g, 100 g, 500 g and 1 kg, and every batch ships with a Certificate of Analysis (COA) and we export worldwide.

Typical applications

Semiconductor research
Electronic devices
Thin films

Industries

Specifications & identifiers

Chemical identifiers
Product name	(3-Mercaptopropyl) trimethoxysilane, 95%
Catalogue No.	VQ-018328
CAS Number	4420-74-0
IUPAC name	3-trimethoxysilylpropane-1-thiol
Molecular formula	C₆H₁₆O₃SSi
Molecular weight	196.34 g/mol
Exact mass	196.0589
Purity / assay	95%
HSN code	29319090
InChIKey	UUEWCQRISZBELL-UHFFFAOYSA-N
SMILES	CO[Si](CCCS)(OC)OC
PubChem CID	20473

Physical properties
Physical form	Liquid
Appearance	Colourless liquid
H-bond donors / acceptors	1 / 4
TPSA	28.7 Å²
UN number	UN 3082
Synonyms	3-(Trimethoxysilyl)-1-propanethiol, (3-Mercaptopropyl)trimethoxysilane, MPTMS, 3-Mercaptopropyltrimethoxysilane, 3-(Trimethoxysilyl)propanethiol, 1-Propanethiol, 3-(trimethoxysilyl)-, Silquest A 189, Prosil 196, Silane A 189, (3-Thiopropyl)trimethoxysilane, NUCA 189, 3-(Sulfanylpropyl)trimethoxysilane

Safety & hazard information (GHS)

Harmful / irritant

Environmental hazard

Signal word: Warning

Hazard statements

H302Harmful if swallowed
H312Harmful in contact with skin
H317May cause an allergic skin reaction
H319Causes serious eye irritation
H411Toxic to aquatic life with long lasting effects

Precautionary statements: P261, P264, P264 + P265, P270, P272, P273, P280, P301 + P317, P302 + P352, P305 + P351 + P338, P317, P321, P330, P333 + P317, P337 + P317, P362 + P364, P391, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of (3-Mercaptopropyl) trimethoxysilane, 95%?

The CAS Registry Number of (3-Mercaptopropyl) trimethoxysilane, 95% is 4420-74-0. It is also known as 3-(Trimethoxysilyl)-1-propanethiol, (3-Mercaptopropyl)trimethoxysilane, MPTMS.

What is the molecular formula and molecular weight of (3-Mercaptopropyl) trimethoxysilane, 95%?

(3-Mercaptopropyl) trimethoxysilane, 95% has the molecular formula C6H16O3SSi and a molecular weight of 196.34 g/mol. Its IUPAC name is 3-trimethoxysilylpropane-1-thiol.

Which grade and pack sizes of (3-Mercaptopropyl) trimethoxysilane, 95% can I order?

We supply (3-Mercaptopropyl) trimethoxysilane, 95% in (95%) grade, in 25 g, 100 g, 500 g, 1 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with (3-Mercaptopropyl) trimethoxysilane, 95%?

Yes. Every lot of (3-Mercaptopropyl) trimethoxysilane, 95% is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can (3-Mercaptopropyl) trimethoxysilane, 95% be shipped internationally?

Yes. (3-Mercaptopropyl) trimethoxysilane, 95% is classified as hazardous (UN 3082), so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.