Description

Methoxybutyl 3-Mercaptopropionate CAS NO 75033-29-3 is a specialized organosulfur compound, specifically a thioester, designed for high-performance applications requiring a reactive mercaptan group. Its molecular structure makes it a valuable intermediate and functional additive, offering unique reactivity and compatibility profiles. This product is essential for manufacturers in the polymer, adhesive, and specialty chemical industries seeking to modify material properties or synthesize advanced chemical entities.

Application

• Polymer Modification & Chain Transfer Agent: Acts as an effective chain transfer agent (CTA) in free-radical polymerizations (e.g., acrylics, styrenics) to control molecular weight and polymer architecture.
• Adhesive & Sealant Formulations: Serves as a cross-linking agent or adhesion promoter in epoxy, polyurethane, and acrylic-based systems, enhancing bond strength and durability.
• Lubricant & Fuel Additive Intermediate: Used in the synthesis of extreme pressure (EP) additives and anti-wear agents for advanced lubricants and functional fuel additives.
• Pharmaceutical & Agrochemical Synthesis: Functions as a key building block for introducing the thioester or mercaptan moiety into more complex molecules in fine chemical synthesis.
• Surface Coatings & Resins: Imparts improved flexibility, weathering resistance, and chemical stability to coatings, inks, and composite resins.
• Rubber & Elastomer Production: Utilized as a vulcanization accelerator or modifier to enhance the curing characteristics and final properties of synthetic rubbers.

Basic Information

Product Name	Methoxybutyl 3-Mercaptopropionate
CAS No.	75033-29-3
Molecular Formula	C8H16O3S
Molecular Weight	192.28 g/mol
Synonyms	3-Mercaptopropionic Acid Methoxybutyl Ester; 2-Methoxybutyl 3-Mercaptopropionate; Methoxybutyl Mercaptopropionate; MBMP; 3-(Methoxybutoxy)-3-oxopropane-1-thiol; Thioglycolic Acid β-Methoxybutyl Ester (related); β-Mercaptopropionic Acid Methoxybutyl Ester
EINECS	Contact for details

Quality Control

Our production of Methoxybutyl 3-Mercaptopropionate adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including assay (GC/HPLC), identity confirmation (IR, NMR), and impurity profiling, to ensure high purity and consistent performance. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting all critical specifications. We operate under a cGMP-compliant quality system to meet the exacting standards of our global B2B clientele.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at temperatures between 15-25°C (59-77°F). This product is easily oxidized; for long-term storage, maintaining an inert atmosphere (e.g., under nitrogen) is recommended to preserve stability and efficacy. Keep away from strong oxidizing agents, strong bases, and sources of heat or ignition.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to reference spectrum
Assay (GC)	≥ 98.0%
Specific Gravity (20°C)	1.050 - 1.090
Refractive Index (20°C)	1.460 - 1.470
Water Content (KF)	≤ 0.5%

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