Description

L-Leucine is an essential branched-chain amino acid (BCAA) critical for protein synthesis and metabolic regulation in living organisms. Its high purity and consistent quality make it a fundamental building block for formulating nutritional supplements, pharmaceutical intermediates, and cell culture media. This product is essential for manufacturers in the nutraceutical, pharmaceutical, food and beverage, and cosmetic industries seeking reliable, high-grade raw materials.

Application

• Nutritional Supplements & Sports Nutrition: A key ingredient in BCAA blends, protein powders, and dietary supplements to support muscle protein synthesis, recovery, and energy metabolism.
• Pharmaceutical Intermediates: Used in the synthesis of active pharmaceutical ingredients (APIs) and as a component in infusion solutions and parenteral nutrition.
• Food & Beverage Fortification: Employed as a nutritional enhancer and flavor modifier in functional foods, medical foods, and beverage products.
• Cell Culture & Fermentation Media: Serves as a vital nitrogen source and growth factor in media for mammalian cell culture and microbial fermentation processes.
• Cosmetic & Personal Care: Incorporated into skincare and haircare formulations for its moisturizing properties and role in maintaining skin and hair health.
• Animal Feed Additives: Used to optimize the amino acid profile in feed for livestock, poultry, and aquaculture to promote growth and improve feed efficiency.

Basic Information

Product Name	L-Leucine
CAS No.	61-90-5
Molecular Formula	C6H13NO2
Molecular Weight	131.17 g/mol
Synonyms	(S)-2-Amino-4-methylpentanoic acid; L-2-Amino-4-methylvaleric acid; (S)-Leucine; Leucine; H-Leu-OH; L-α-Aminoisocaproic acid; (S)-2-Amino-4-methylpentanoic acid
EINECS	200-522-0

Quality Control

Our L-Leucine is manufactured under strict quality management systems. Each batch is tested to ensure it meets stringent specifications for identity, purity, and safety, aligning with standards such as USP, FCC, and EP where applicable. A comprehensive Certificate of Analysis (COA) documenting all test results is provided with every shipment to guarantee traceability and batch-to-batch consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at controlled room temperature (15-25°C). The product is hygroscopic (moisture-sensitive); keep the container tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	White crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	98.5% - 101.5%
Specific Rotation [α]20/D	+14.9° to +16.0°
Loss on Drying	≤ 0.2%
Residue on Ignition (Sulfated Ash)	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm
Related Substances (HPLC)	Total impurities ≤ 0.5%
pH (1% Solution)	5.5 - 7.0

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.