Overview
Methyl D-(+)-Lactate is a chiral ester derived from lactic acid, specifically the D-(+) enantiomer. It is widely recognized for its role as a versatile intermediate in organic synthesis and as a solvent in specialized applications. Its chirality makes it particularly valuable in the pharmaceutical industry, where enantiomeric purity is crucial. The compound is synthesized through esterification of D-(+)-lactic acid with methanol. Its high purity and specific optical rotation are key quality indicators for industrial buyers. Regulatory compliance, such as REACH and FDA approvals, may be required depending on the end-use.
Physical and Chemical Properties
Methyl D-(+)-Lactate is a colorless liquid with a mild, ester-like odor. Its miscibility with water and common organic solvents like ethanol and acetone enhances its utility as a reaction medium. The compound's chiral center at the α-carbon allows it to participate in stereospecific reactions, a feature exploited in asymmetric synthesis. Thermal stability up to its boiling point (144-145°C) makes it suitable for high-temperature processes. The density (1.09 g/cm³) and refractive index (≈1.42) are critical for quality control during production and formulation.
Main Applications
In pharmaceuticals, Methyl D-(+)-Lactate serves as a building block for chiral drugs, including antibiotics and antiviral agents. Its use in agrochemicals includes the synthesis of enantiomerically pure pesticides and herbicides, where biological activity often depends on stereochemistry. The solvent properties are leveraged in coatings, inks, and specialty cleaning formulations. Additionally, it finds niche applications in flavors and fragrances due to its mild, fruity aroma. Industrial buyers should prioritize suppliers with GMP or ISO certification for critical applications.
Safety and Storage
While Methyl D-(+)-Lactate has low acute toxicity, prolonged exposure may cause mild skin or eye irritation. Safety Data Sheets (SDS) recommend using personal protective equipment (PPE) such as gloves and goggles. Spills should be contained with absorbent materials and disposed of according to local regulations. Storage in HDPE or stainless steel containers under inert atmosphere (e.g., nitrogen) prevents degradation. Shelf life typically exceeds two years when stored below 25°C. Compatibility with seals and gaskets (e.g., Viton) should be verified for large-scale handling.
B2B Procurement Guide
Key procurement criteria include chiral purity (often ≥98% ee), residual solvent levels, and batch-to-batch consistency. Technical datasheets should specify optical rotation ([α]D values) and HPLC/GC purity profiles. Bulk purchases (drum or IBC quantities) may offer cost advantages but require validation of storage infrastructure. Supplier audits are advisable to assess manufacturing controls and regulatory documentation. Leading producers are concentrated in China, Europe, and North America. Incoterms (e.g., CIF, FOB) and lead times vary significantly; minimum order quantities (MOQs) commonly range from 1 kg to 100 kg.
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