Methyl 3-Mercaptopropionate (CAS 2935-90-2) is a chemical compound with distinct properties that dictate its applications and handling procedures. As a fine chemical intermediate, a thorough understanding of its physical and chemical characteristics is essential for chemists, laboratory technicians, and procurement specialists. This knowledge ensures its effective use in synthesis and formulation while maintaining a safe working environment. We aim to provide comprehensive information to help our clients leverage this valuable compound effectively.

Physically, Methyl 3-Mercaptopropionate is typically described as a clear, colorless liquid. Its molecular formula is C4H8O2S, with a molecular weight of approximately 120.17 g/mol. The presence of the thiol group (-SH) lends it a characteristic sulfurous odor, which can be noticeable even at low concentrations. This odor is a common trait among mercaptans and requires appropriate ventilation during handling. The boiling point is around 164-166 °C at atmospheric pressure, and its flash point is approximately 60-61 °C (closed cup), classifying it as a combustible liquid that requires careful handling near ignition sources.

Chemically, the molecule contains a reactive thiol group and a methyl ester group. The thiol group makes it susceptible to oxidation, particularly in the presence of air or oxidizing agents, potentially forming disulfides. This means that proper storage under an inert atmosphere (like nitrogen) might be beneficial for long-term preservation of its purity, especially for applications requiring the free thiol. The ester group can undergo hydrolysis in the presence of acids or bases, yielding 3-mercaptopropionic acid and methanol. These reactivity profiles are what make it a valuable intermediate in organic synthesis, but they also dictate the care needed during its use and storage.

When handling Methyl 3-Mercaptopropionate, it is imperative to follow standard laboratory safety protocols. This includes wearing appropriate personal protective equipment (PPE) such as chemical-resistant gloves (e.g., nitrile or neoprene), safety goggles or a face shield, and a lab coat. Work should be conducted in a well-ventilated area, preferably within a fume hood, to minimize exposure to vapors and its distinctive odor. In case of skin contact, wash the affected area immediately with soap and water. For eye contact, flush with plenty of water for at least 15 minutes and seek medical attention.

Storage recommendations for Methyl 3-Mercaptopropionate typically include keeping the container tightly closed in a cool, dry, and well-ventilated place, away from heat, sparks, and open flames. Storing it away from incompatible materials, such as strong oxidizing agents, strong acids, and strong bases, is also crucial to prevent hazardous reactions. For businesses looking to buy this chemical, it is advisable to source from manufacturers who provide detailed Safety Data Sheets (SDS) that outline all relevant properties, hazards, and handling instructions. We are committed to ensuring our customers have access to the information needed to safely and effectively utilize our high-purity Methyl 3-Mercaptopropionate.