L-Selenomethionine
SeMet, Selenium-L-methionine
- CAS
- 3211-76-5
- EC
- 608-705-0
- Sectors
- Nutraceuticals & Supplements, Animal Nutrition, Pharma & Healthcare
L-Selenomethionine (CAS 3211-76-5) is a naturally occurring organic selenium compound that appears as a white to off-white crystalline powder and is used in dietary supplements, animal feed and pharmaceuticals for immune regulation, thyroid health and oxidative protection. It provides high selenium bioavailability and antioxidant support.
Typical Properties
| Molecular formula | C5H11NO2Se |
|---|---|
| Molecular weight | 196.11 g/mol |
| Appearance | Solid |
| Form | powder |
| Color | white to off-white |
| Melting point | 275 °C (decomp) |
| Water solubility | soluble |
| GHS signal word | Danger · Acute toxicity, Health hazard, Environmental hazard |
| HS code | 29309090 |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
L-Selenomethionine
Applications
Used in dietary supplements, animal feed, and pharmaceuticals for immune regulation, thyroid health, and oxidative protection.
Safety & Risks
Safe within nutritional dosage limits; handle in low humidity and away from heat.
Packaging
Delivered in 1–25 kg aluminum foil bags or fiber drums. Store cool, dry, and sealed.