Description

DL-Selenomethionine CAS NO 1464-42-2 is an organoselenium compound, a synthetic analogue of the essential amino acid methionine where sulfur is replaced by selenium. This substitution is critical as it provides a bioavailable source of selenium, a vital trace element for numerous biological functions. It is primarily utilized in the formulation of high-quality nutritional supplements, animal feed additives, and advanced biochemical research.

Application

• Nutritional Supplements & Fortification: A key ingredient in premium human dietary supplements and functional foods to ensure adequate selenium intake.
• Animal Feed & Veterinary Nutrition: Incorporated into feed premixes for livestock, poultry, and aquaculture to promote animal health, growth, and selenium sufficiency.
• Biochemical & Pharmaceutical Research: Serves as a vital reagent in metabolic studies, enzyme research, and the development of selenium-based therapeutic agents.
• Cell Culture Media: Used as a defined selenium source in specialized media formulations for biotechnology and cell biology applications.
• Reference Standard: Employed as an analytical standard in quality control laboratories for HPLC, LC-MS, and other chromatographic methods.

Basic Information

Product Name	DL-Selenomethionine
CAS No.	1464-42-2
Molecular Formula	C5H11NO2Se
Molecular Weight	196.11 g/mol
Synonyms	Seleno-DL-methionine; (±)-Selenomethionine; DL-2-Amino-4-(methylseleno)butyric acid; Selenomethionine, DL-; Se-Met; Selenium methionine; (RS)-Selenomethionine; 4-(Methylseleno)-2-aminobutanoic acid
EINECS	215-965-8

Quality Control

Our DL-Selenomethionine is manufactured under strict quality management systems. Each batch is subjected to comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets stringent specifications for nutritional and research applications. Certificates of Analysis (COA) detailing purity, heavy metals, and other critical parameters are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at controlled room temperature (15-25°C). Due to its light-sensitive and easily oxidized nature, it is recommended to handle under an inert atmosphere for long-term storage and to minimize exposure to air and moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference standard
Assay (HPLC)	≥ 98.0%
Optical Rotation	± 0.5° (c=1 in 1N HCl)
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Selenium Content	39.0 - 41.0%

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