CAS No. 3211-76-5

Batch: Purity:99.94
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L-SelenoMethionine Chemical Structure
Chemical Structure
Check the L-SelenoMethionine product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Chemical Information

IUPAC Name (2S)-2-amino-4-methylselanylbutanoic acid
CAS Number 3211-76-5
Molecular Formula

C5H11NO2Se
Molecular Weight (MW) 196.11
SMILES C[Se]CCC(C(=O)O)N
InChIKey RJFAYQIBOAGBLC-BYPYZUCNSA-N

Ordering Information

Biological Activity

L-SelenoMethionine is an organoselenium compound and a naturally occurring amino acid serving as a major dietary source of selenium. It functions primarily as an antioxidant agent and chemopreventive driver by incorporation into selenoproteins, which reduces reactive oxygen species accumulation and mitigates oxidative damage. Additionally, L-selenomethionine exerts antiproliferative effects by inducing cell cycle arrest and apoptosis in tumor cells, thereby contributing to cancer chemoprevention and cellular protection against oxidative stress.

How to Prepare Stock Solution?

Concentration Volume Mass
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Solubility

Batch:
All in vitro solubility values are batch-tested experimental data (non-literature values).
Solvent Solubility & Note
Water 39 mg/mL
DMSO Insoluble
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)
FAQ
Q: Why does a DMSO stock precipitate in media/saline?
A: It is caused by unheated aqueous media (supersaturation), local solvent shock, or incorrect mixing sequence.
How to fix it?
  • Preheat media/saline to 37°C.
  • Mix rapidly (pipette/vortex) upon addition.
  • For complex mixes, always add the aqueous phase last.
  • Re-dissolve minor precipitates with a 37°C water bath and sonication (≤30 min).

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Note: Technical data last updated: Sep 1, 2026.