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L-selenomethionine

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Origin: China

Cas No: 3211-76-5

Specification: 99%min

Min order Quantity: 1 /kg

Supply Ability: 100 mt/month

Lead time: 7 days for OEM, 3 days for ready goods

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CAS No.: 3211-76-5 Formula: C5H11NO2Se Molecular Weight: 196.10600

Description

Selenomethionine is a naturally occurring amino acid. The L-selenomethionine enantiomer is the main form of selenium found in Brazil nuts, cereal grains, soybeans, and grassland legumes, while Se-methylselenocysteine, or its γ-glutamyl derivative, is the major form of selenium found in Astragalus, Allium, and Brassica species. In vivo, selenomethionine is randomly incorporated instead of methionine. Selenomethionine is readily oxidized.
Selenomethionine's antioxidant activity arises from its ability to deplete reactive oxygen species.

Basic Info

Chemical Name	L-selenomethionine
Synonyms	(S)-2-Amino-4-(methylselanyl)butanoic acid; L-Selenomethioninum; (S)-2-Amino-4-(Methylseleno)Butyric Acid; Selenium-L-methionine; Seleno-L-methionine; Se-methionine; (2S)-2-amino-4-methylselanylbutanoic acid; SeMet; L(+)-Selenomethionine; L-SelenoMethionine; L-(+)-Selenomethionine;
CAS No.	3211-76-5
Molecular Formula	C5H11NO2Se
Molecular Weight	196.10600
PSA	63.32000
LogP	0.65930

Properties

Appearance & Physical State	white to off-white powder
Boiling Point	320.8ºC at 760 mmHg
Melting Point	265ºC
Flash Point	147.8ºC
Refractive Index	18 ° (C=0.5, 2mol/L HCl)
Water Solubility	soluble
Stability	Stable under normal temperatures and pressures.
Storage Condition	-20ºC

Safety Info

RTECS	EK7713840
Hazard Class	6.1
Safety Statements	S20/21-S28-S45-S60-S61
HS Code	2922499990
WGK Germany	3
Packing Group	I; II; III
RIDADR	UN 3283
Risk Statements	R23/25; R33; R50/53
Hazard Codes	T; N
Symbol	GHS06, GHS08, GHS09
Hazard Declaration	H301 + H331; H373; H410
Caution Statement	P261; P273; P301 + P310; P311; P501
Signal Word	Danger

Synthesis Route

(2S)-2-(tert-butoxycarbonylamino)-4-methylselanyl-butanoic acid→L-selenomethionine
2-acetamido-4-(methylselanyl)butanoic acid→L-selenomethionine
L-benzyl N-t-butoxycarbonylselenomethioninate→L-selenomethionine

Toxicity

Exposure Route	Type of Test	Species Observed	Dose/Duration	Toxic Effects
Oral	TDLo - Lowest published toxic dose	Rodent - rat	269 mg/kg/8W-C	1.Liver-other changes 2.Nutritional and Gross Metabolic-weight loss or decreased weight gain

Precursor

SELENO-DL-METHIONINE
(2S)-2-amino-4-(benzylselanyl)butanoic acid
(2S)-2-(tert-butoxycarbonylamino)-4-methylselanyl-butanoic acid
2-acetamido-4-(methylselanyl)butanoic acid

Downstream Product

(2S)-2-(tert-butoxycarbonylamino)-4-methylselanyl-butanoic acid

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