L-Methionine

L-Methionine EP/USP 25 kg bag

L-Methionine EP/USP 25 kg bag

• Commercial Name:  L-Methionine
• Chemical Formula: C ₅ H ₁₁ NO ₂ S
• Molecular Weight :  149.2 g/mol
• CAS Number: 63-68-3
• Appearance :  White crystalline powder

Description:

L-Methionine is an essential sulfur-containing amino acid of pharmaceutical grade, with an assay of 98.5–101.5% (dry basis). Available from qualified manufacturers including Kyowa Hakko Bio Co., Ltd. (Japan) and Hebei Changhao Biotechnology Co., Ltd. (China), it fully conforms to Ph. Eur. and USP monograph requirements. As an essential amino acid that cannot be synthesized by the human body, L-Methionine is a critical component of parenteral nutrition formulations. It also plays an important role as an antioxidant excipient in pharmaceutical preparations, helping to prevent metal-catalyzed oxidation of sensitive active ingredients. Its high purity, controlled specific rotation, and stringent impurity profile — including HPLC-tested related compounds — ensure consistent performance in demanding pharmaceutical and biopharmaceutical applications.

Typical Applications

• Essential component in parenteral (intravenous) nutrition solutions 
• Antioxidant excipient in injectable pharmaceutical formulations 
• Supplement in oral nutritional products and dietary supplements 
• Nutrient in mammalian cell culture media for bioproduction 
• Building block for peptide and protein synthesis

Key Features

• High purity (98.5–101.5% on dry basis) 
• Dual compendial compliance: Ph. Eur. and USP 
• HPLC-controlled impurity profile (methionine sulfoxide, N-acetyl-D,L-methionine) 
• Controlled specific rotation confirming L-isomer identity 
• Multiple qualified supplier sources available 
• Suitable for injectable and parenteral nutrition applications

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