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L-Lysine Liquid stands out as a convenient and concentrated form of the essential amino acid lysine, widely used across agriculture, feed production, chemical industries, and fermentation processes. The product arrives as a clear to slightly yellowish solution. It carries a distinct, subtle odor, commonly associated with amino acids in solution. Unlike flakes, powder, pearls, or crystal forms, this liquid version offers simple, measurable handling for industrial applications. L-Lysine plays a fundamental role in animal growth and human nutrition, since the body cannot synthesize it on its own. Producers turn to this compound to boost the protein content of feed and to supplement essential nutrients.
The molecular formula for L-Lysine is C6H14N2O2. It holds a molecular weight of 146.19 g/mol. The molecule features both an amino group and a carboxyl group, supporting its role in protein synthesis and making it highly reactive in biological systems. This basic amino acid structure, with its extra amino group on the side chain, naturally attracts water molecules, encouraging solubility and stability in aqueous environments. This property explains why L-Lysine transitions effectively between its crystal, powder, and liquid forms, allowing manufacturers to process and package it according to industrial demand.
L-Lysine Liquid reveals itself as a colorless to pale yellow solution, typically with a mildly viscous quality depending on concentration. Standard specifications place lysine content between 30%–50% by weight (w/w), paired with a density around 1.1–1.25 g/mL at 20°C. Some producers prefer a lower concentration for ease of dilution in water, making it compatible with various dosages in feed systems. The pH sits comfortably between 5.0 and 6.5, ensuring stability through transit and storage. In real-world use, this form lets farmers and manufacturers introduce lysine directly into tanks or mixing towers without the need for grinding, sieving, or rehydrating solid materials. Storage in polyethylene containers keeps the liquid stable, minimizing the risk of contamination or evaporation loss.
International trade requires clear classification, and L-Lysine falls under the Harmonized System Code 29224100. This code covers “Amino acids and their esters, not put up as medicines”, which fits L-Lysine’s primary applications in feed supplements and as a chemical building block. Customs authorities rely on this number to properly assign duties, taxes, and inspection requirements for global shipments. For businesses engaged in sourcing, the HS Code streamlines cross-border transactions, customs clearance, and compliance with safety regulations.
L-Lysine appears in several commercial forms: liquid, flakes, solid, powder, pearls, and crystal. The liquid format excels for direct blending, dosing, and injection into wet-feed systems, especially where dust control and homogeneity matter. Solid forms like flakes, powder, and crystal bring advantages in shelf-life and ease of bulk storage, but require additional steps for use in solutions. Pearls find occasional use, but less so for industrial-scale applications. Many feed mills and fermentation operators favor liquid due to simple transfer, reduced handling losses, and minimized inhalation risk for workers. I have seen this firsthand on poultry and swine operations where operators prefer pumping additives rather than managing powders, especially in humid or automated settings.
L-Lysine supports strong solubility in water but poorly dissolves in alcohol and non-polar solvents. The chemical itself is not classified as hazardous or harmful in its usual concentrations. No significant volatile organic compounds (VOCs) arise from the solution, making it safer to handle than many industrial chemicals. Exposure rarely causes skin or eye irritation, though good lab practice includes gloves and splash protection. Accidental spills on equipment or floors wash away readily with water. For transport, containers require secure closures to prevent leaks and contact with strong acids or oxidizers. L-Lysine carries a minor risk of decomposition at temperatures above 200°C, but liquid forms almost never reach those extremes in storage or practical use. Regulatory bodies, including REACH in Europe and the FDA in the United States, list L-Lysine among low-risk raw materials, reflecting its history of safe addition to food and feed products, with only rare cases of sensitivity or allergy.
Most of the world’s supply of L-Lysine ends up as a raw material in animal nutrition, especially for swine, poultry, and aquaculture. It fills a critical protein gap in feed recipes based on corn or wheat, which run low in essential amino acids. Supplementing lysine improves weight gain, feed efficiency, and animal health, reducing nitrogen waste in manure. Beyond agriculture, L-Lysine serves as a precursor in pharmaceuticals and as an intermediate for specialty chemicals, such as chelating agents for industrial cleaning. It also finds a role in food fortification, especially for plant-based foods and supplements aimed at vegan diets. The liquid format maximizes ease of delivery and tracking, tying into automated systems that record dosages for regulatory and nutritional audits.
Liquid L-Lysine demands robust storage and quality control. Microbial growth, contamination, and evaporation can compromise large inventories. Manufacturers respond with sterilized, sealed tanks and regular microbial testing, using food-safe preservatives when needed. High-concentration solutions risk crystallization at low temperatures, so heated or insulated tanks sometimes step in to keep product fluid, especially during winter transport. Feed mills set up calibration checks on dosing pumps and regular tank cleaning schedules. In my experience on animal farms, careful management of inventory and routine quality checks avoid costly product loss while keeping the feed consistent. Upstream, ongoing improvements in biofermentation methods reduce production waste and energy use, making L-Lysine one of the more sustainable amino acid options in the global market.
Chemical Name: L-Lysine
Appearance: Clear to yellowish liquid
Molecular Formula: C6H14N2O2
Molecular Weight: 146.19 g/mol
Concentration: 30%–50% w/w lysine
Density: 1.1–1.25 g/mL at 20°C
HS Code: 29224100
pH: 5.0–6.5
Solubility: Highly soluble in water
Hazard Profile: Non-hazardous, low toxicity
Primary Uses: Feed additive, raw material in chemical and pharmaceutical industries, food supplement
Storage: Polyethylene or stainless steel containers, away from strong acids or oxidizers, protected from freezing
West Ujimqin Banner, Xilingol League, Inner Mongolia, China
