For professionals in the feed, food, and pharmaceutical industries, understanding the specifications of essential amino acids like L-Threonine (CAS 72-19-5) is crucial for ensuring product quality and performance. As a leading L-Threonine manufacturer and supplier in China, we emphasize transparency and adherence to international standards for all our products. This guide aims to demystify the key specifications that buyers should consider when sourcing L-Threonine.

Appearance: Our L-Threonine is typically presented as a white to light brown crystalline powder or granule. This visual characteristic is an initial indicator of product quality and consistency. Variations can sometimes suggest differences in processing or purity, making visual inspection an important first step for any buyer.

Content (on dry basis) ≥ 98.5%: This is perhaps the most critical specification, indicating the actual amount of L-Threonine present in the product after accounting for moisture. A high content, such as our guaranteed ≥ 98.5%, ensures that the amino acid is potent and effective, delivering the intended nutritional or physiological benefits. When you buy L-Threonine, ensuring a high assay is paramount for accurate formulation.

Loss on Drying % ≤ 1.0%: This parameter measures the moisture content in the L-Threonine powder. High moisture can lead to clumping, reduced shelf life, and potential microbial growth. Our commitment to low loss on drying (≤ 1.0%) ensures a stable, free-flowing product that is easy to handle and store, contributing to its overall quality and longevity.

Burning Residue % ≤ 0.5%: Also known as ash content, this specification indicates the amount of inorganic impurities remaining after the L-Threonine sample is burned. A low burning residue (≤ 0.5%) signifies a purer product with fewer unwanted inorganic contaminants, which is especially important for applications in human nutrition and pharmaceuticals.

Specific Optical Rotation (α) D20 -26.0° to -29.0°: As an essential amino acid, L-Threonine is chiral, meaning it exists in different stereoisomeric forms. The specific optical rotation is a measure of the product's optical activity and confirms that it is the naturally occurring L-isomer, which is the biologically active form. Adherence to this range ensures that you are purchasing the correct isomer for your applications. This specification is particularly important when you buy L-Threonine for high-value applications.

pH 5.0-6.5: The pH of a solution made from L-Threonine provides insight into its chemical stability and compatibility. A pH within this range indicates that the product is typically neutral and compatible with most formulation ingredients. This is a standard parameter for quality control that we rigorously monitor.

Heavy Metal (in Pb) ≤ 20 mg/kg and Arsenic (as As) ≤ 2 mg/Kg: These are crucial safety parameters, especially for products intended for human or animal consumption. They set limits on the presence of toxic heavy metals like lead and arsenic. Our adherence to these strict limits ensures that our L-Threonine is safe for use in sensitive applications. When sourcing from a reliable L-Threonine supplier, these safety certifications are non-negotiable.

For businesses seeking to purchase L-Threonine, NINGBO INNO PHARMCHEM CO.,LTD. offers a product that consistently meets and often exceeds these essential specifications. Our expertise as an L-Threonine manufacturer in China allows us to provide a reliable and high-quality supply. We invite you to contact us for detailed specifications, pricing, and to discuss how our premium L-Threonine can benefit your formulations.