Overview
2S,3S-Butanediol is a stereospecific isomer of butanediol, characterized by its two chiral centers in the S configuration. This four-carbon diol serves as a valuable chiral building block in organic synthesis and pharmaceutical manufacturing. The compound's stereochemistry makes it particularly useful for creating enantiomerically pure products. First synthesized in the mid-20th century, 2S,3S-Butanediol has gained importance in asymmetric synthesis due to its rigid molecular structure and predictable reactivity. Industrial production typically involves microbial fermentation or chemical synthesis from chiral precursors, with fermentation methods becoming increasingly prevalent for their environmental benefits.
Physical and Chemical Properties
As a vicinal diol, 2S,3S-Butanediol exhibits typical alcohol reactivity including esterification, etherification, and oxidation reactions. The compound's two hydroxyl groups are in an erythro configuration, influencing its crystalline structure and hydrogen bonding capabilities. Its viscosity is higher than comparable non-chiral diols due to intermolecular hydrogen bonding. The optical rotation of pure 2S,3S-Butanediol is approximately -13.5° (c = 10, H2O), serving as an important quality control parameter. The compound shows excellent thermal stability below 150°C, making it suitable for various chemical processes. Its hygroscopic nature requires careful handling to prevent moisture absorption during storage and transfer.
Main Applications
In pharmaceutical manufacturing, 2S,3S-Butanediol serves as a key intermediate for antiviral drugs, antibiotics, and chiral ligands. Its rigid structure helps control stereochemistry in complex syntheses, particularly for prostaglandin analogs and other bioactive molecules. The agrochemical industry utilizes this diol in the production of selective pesticides and plant growth regulators. Additional applications include specialty polymers where the chiral centers impart unique material properties, and as a component in chiral stationary phases for chromatography. Emerging uses in green chemistry involve its conversion to valuable platform chemicals through biocatalytic processes. The compound's versatility continues to drive research into novel applications across multiple industries.
Safety and Storage
While 2S,3S-Butanediol is not classified as highly hazardous, proper safety precautions are essential. The compound may cause eye irritation and mild skin irritation upon prolonged contact. Adequate ventilation should be maintained when handling in enclosed spaces, and chemical-resistant gloves (nitrile or neoprene) are recommended. For long-term storage, keep containers tightly sealed in a cool (15-25°C), dry environment away from strong oxidizers. Stainless steel or polyethylene containers are preferred. Bulk storage tanks should include nitrogen blanketing to prevent moisture absorption and oxidation. Shelf life typically exceeds two years when stored properly, though periodic quality checks are advised for critical applications.
B2B Procurement Guide
When sourcing 2S,3S-Butanediol, prioritize suppliers who provide comprehensive certificates of analysis including optical purity, water content, and residual solvent data. Pharmaceutical-grade material (≥99% purity) commands premium pricing but ensures reliability for sensitive applications. Technical-grade (95-98% purity) may suffice for less critical uses. Consider minimum order quantities (MOQs) - bulk purchases (100kg+) often yield 15-30% cost savings. Evaluate supplier capabilities for custom packaging (drums, IBCs, or tanker quantities) and regional warehousing to reduce logistics costs. For international shipments, verify export/import regulations as some countries classify chiral diols as controlled substances requiring special permits.
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