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L-selenomethionine

CAS Number
3211-76-5
EC Number
608-705-0
Chemical Formula
C5H11NO2Se
Molecular Weight
196.12 g/mol

Description

L-Selenomethionine (CAS 3211-76-5 ) is the bioavailable, organically bound form of selenium used across nutritional, pharmaceutical, and cosmetic applications. As Seleno-L-methionine, it is the preferred selenium source in dietary supplements. It is widely used in functional food fortification due to its superior absorption compared to inorganic selenium salts. In dietary supplements and nutraceuticals, it serves as the primary active ingredient in selenium fortification products. The compound is essential for targeting antioxidant support formulations. Pharmaceutical manufacturers use it as the selenium source in micronutrient preparations, including tablets, capsules, and infusion solutions where precise dosing is critical. In cosmetic and personal care formulations, it functions as an antioxidant and moisturizing agent in anti-aging creams and serums. Biotechnology and cell culture applications rely on it as a selenium supplement in growth media. It is particularly useful where organic selenium is required for protein expression studies. L-Selenomethionine is supplied as a white to off-white crystalline powder available in food-grade and pharmaceutical-grade specifications. The USP and Ph.Eur. grades are commonly sourced for regulated applications. Bulk quantities are offered for industrial formulators, with smaller research quantities available for biotechnology and laboratory use. Contact us for supply of L-selenomethionine Request Quote

Other Names (Synonyms)

(S)-selenomethionine | (2S)-2-azaniumyl-4-(methylselanyl)butanoate | Seleno-L-methionine | SeMet | (2S)-2-amino-4-methylselanylbutanoic acid | (2S)-2-amino-4-(methylseleno)butanoic acid | Selenomethionine-L | RefChem:1088270

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Melting Point275 °C (decomp)
Boiling Point320.8±37.0 °C(Predicted)
AppearanceSolid
Colorwhite to off-white
Formpowder
Water Solubilitysoluble
Refractive Index18 ° (C=0.5, 2mol/L HCl)
Log P0.152 (est)

Safety & Handling

Danger
GHS06· ToxicGHS08· Health HazardGHS09· Environment

Hazard Statements

H301
H301
H331
H331
H373
H373
H400
H400
H410H410

Precautionary Statements

P260
P260
P261
P261
P264
P264
P270
P270
P271
P271
P273
P273
P316
P316
P319
P319
P321
P321
P330
P330
P391
P391
P405
P405
P501
P501
P316
P316
P340
P340
P233

Trade & Regulatory

HS Code29309090
UN Number3283
ADR Class6.1
Packing GroupII
Storage Class6.1A - Combustible acute toxic Cat. 1 and 2 very toxic hazardous materials
WGK (Germany)3