Overview
Lithium 2-hydroxypropanoate is an organometallic compound formed by the reaction of lactic acid with lithium hydroxide. It combines the biocompatibility of lactate anions with the electrochemical properties of lithium ions, making it valuable for specialized applications. First synthesized in the early 20th century, this compound gained industrial significance with advancements in lithium battery technology and pharmaceutical formulation. It's classified as a mild alkali salt with better solubility characteristics compared to many other lithium salts.
Physical and Chemical Properties
The compound exhibits high water solubility (approximately 50 g/100 mL at 20°C) due to its polar nature, though it shows limited solubility in most organic solvents. Its aqueous solutions are weakly alkaline with pH values typically ranging from 8-9 at 1% concentration. Thermogravimetric analysis reveals decomposition beginning around 150°C, making it unsuitable for high-temperature processes. The lithium content typically constitutes 6.5-7.2% of the molecular weight, a critical parameter for battery applications. Unlike some lithium salts, it doesn't form hydrates under normal conditions.
Main Applications
In lithium-ion batteries, this compound serves as an electrolyte additive to improve cycle life and thermal stability, particularly in high-performance applications. The lactate anion helps stabilize the solid-electrolyte interphase (SEI) layer on electrodes. The pharmaceutical industry utilizes it as an excipient in sustained-release formulations and as a lithium carrier in mood-stabilizing drugs. Other applications include use as a catalyst in specialty polymerizations and as a buffering agent in biochemical research where lithium's effects need to be studied without chloride interference.
Safety and Storage
While not classified as acutely toxic, prolonged exposure to lithium 2-hydroxypropanoate powder may cause respiratory or skin irritation. Safety data sheets recommend using NIOSH-approved dust masks and chemical goggles when handling bulk quantities. Proper storage requires moisture-proof containers with desiccants, as the compound is hygroscopic. Bulk quantities should be palletized in a cool (15-25°C), well-ventilated area away from strong acids. Shelf life typically exceeds 2 years when stored correctly, though potency for pharmaceutical use should be verified after 12 months.
B2B Procurement Guide
Industrial buyers should specify required purity grades - technical grade (95-98%) for battery applications versus pharmaceutical grade (>99%) for medical uses. Key quality indicators include lithium content verification, heavy metal limits (<10 ppm), and residual solvent testing. Lead times vary from 2-6 weeks depending on quantity and grade. Many suppliers offer both anhydrous and solution forms, with pricing typically 15-20% lower for aqueous solutions. Consider vendors with ISO 9001 certification and batch traceability, especially for regulated industries.
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