CAS Registry Number

CAS 4420-74-0 — 3-Mercaptopropyl)trimethoxysilane

(3-Mercaptopropyl)trimethoxysilane is an organosilane coupling agent featuring a thiol functional group, widely used to enhance adhesion, improve mechanical properties, and promote cross-linking in composites, adhesives, and coatings—particularly for rubber, elastomers, and sulfur-cured systems. It reacts with silica, metals, and polymers to create durable bonds. CAS 4420-74-0, molecular formula C6H16O3SSi, molecular weight 196.3399 g/mol, non-hazardous (no signal word), and stable under refrigeration (storage temperature +4°C). Molekula supplies (3-Mercaptopropyl)trimethoxysilane from research to bulk quantities with full documentation and ISO 9001:2015 traceability.