Description

3-(Mercaptomethyl)-3-Methyloxetane CAS NO 63991-91-3 is a specialized sulfur-containing heterocyclic compound, specifically an oxetane derivative with a pendant mercaptomethyl group. This unique structure makes it a valuable high-performance monomer and intermediate for advanced polymer synthesis, particularly in the production of materials requiring specific optical, mechanical, or adhesive properties. It is primarily utilized by R&D chemists and material scientists in the polymer, specialty chemical, and advanced coatings industries.

Application

• High-Refractive-Index Optical Polymers: A key monomer for synthesizing transparent polymers with high refractive indices used in advanced optical lenses, LED encapsulants, and optical adhesives.
• Polymer Modification & Crosslinking Agent: The thiol (-SH) group enables thiol-ene click chemistry for efficient polymer crosslinking, network formation, and post-polymerization modification to tailor material properties.
• Adhesive & Sealant Formulations: Serves as a reactive diluent and adhesion promoter in high-performance UV-curable and epoxy-based adhesive systems.
• Specialty Coatings Resins: Incorporated into coating formulations to enhance scratch resistance, chemical durability, and adhesion to various substrates.
• Pharmaceutical & Agrochemical Intermediates: Used as a building block in the synthesis of more complex molecules for active ingredient development.
• Lithographic Materials: Potential application in photoresist polymers for semiconductor manufacturing due to its polymerizable oxetane ring.

Basic Information

Product Name	3-(Mercaptomethyl)-3-Methyloxetane
CAS No.	63991-91-3
Molecular Formula	C6H10OS
Molecular Weight	130.21 g/mol
Synonyms	3-Mercaptomethyl-3-methyloxetane; 3-Methyl-3-mercaptomethyloxetane; 3-(Mercaptomethyl)-3-methyloxacyclobutane; Oxetane, 3-(mercaptomethyl)-3-methyl-; MMMO; 3-Methyl-3-oxetanemethanethiol
EINECS	Contact for details

Quality Control

Our production of 3-(Mercaptomethyl)-3-Methyloxetane adheres to stringent internal quality standards to ensure batch-to-batch consistency and high purity for demanding applications. Certificates of Analysis (COA) are provided with each shipment, detailing key parameters such as assay, identity, and impurity profiles. We support custom synthesis and purity grades to meet specific research or production requirements.

Storage

Preserve in a tightly closed container, protected from light. Store under an inert atmosphere (e.g., nitrogen or argon) in a cool, dry, and well-ventilated place. Recommended storage temperature is 2-8°C to minimize oxidation and polymerization. Keep away from heat, sparks, open flames, and strong oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 97.0%
Water Content (KF)	≤ 0.5%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.