Description

Butyl 3-Mercaptopropionate is a versatile organosulfur compound, specifically a thioester, widely used as a key intermediate and chain transfer agent in polymer synthesis. Its value lies in its ability to efficiently control polymer molecular weight and architecture, leading to materials with tailored properties. This product is essential for manufacturers in the polymer, specialty chemical, and adhesive industries seeking to fine-tune the performance of their formulations.

Application

• Polymer Synthesis: Acts as an effective chain transfer agent (CTA) in free-radical polymerization processes, including for acrylics and styrenics, to control molecular weight and polydispersity.
• Specialty Monomers: Serves as a crucial intermediate in the production of functional monomers containing thiol or other sulfur-based groups.
• Adhesives & Sealants: Used in formulations to modify polymer backbones, improving flexibility, adhesion, and curing characteristics.
• Coatings & Resins: Incorporated to engineer specific properties in coating resins, such as enhanced weatherability and cross-linking density.
• Lubricant & Fuel Additives: Functions as a precursor for additives that provide anti-wear, extreme pressure, or antioxidant properties.
• Pharmaceutical Intermediates: Utilized in the synthesis of active pharmaceutical ingredients (APIs) and other fine chemicals where the thioester moiety is required.

Basic Information

Product Name	Butyl 3-Mercaptopropionate
CAS No.	16215-21-7
Molecular Formula	C7H14O2S
Molecular Weight	162.25 g/mol
Synonyms	Butyl 3-Mercaptopropanoate; 3-Mercaptopropionic Acid Butyl Ester; n-Butyl 3-Mercaptopropionate; Butyl β-Mercaptopropionate; 3-(Butoxycarbonyl)propane-1-thiol; Thioglycolic Acid Butyl Ester (related); BMP (abbreviation); Propanoic acid, 3-mercapto-, butyl ester
EINECS	240-349-9

Quality Control

Our Butyl 3-Mercaptopropionate is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including assay by GC or HPLC and impurity profiling, to ensure it meets precise specifications for purity and consistency. Certificates of Analysis (COA) are provided with every shipment, and we support compliance with relevant global regulatory frameworks such as REACH.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents, strong bases, and sources of ignition. Due to its light-sensitive nature, containers should be kept in the original packaging or equivalent light-blocking material.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 98.0%
Specific Gravity (20°C)	1.010 - 1.030
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.