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2-Amino-4-(methylselenyl)buttersure

DL-Selenomethionine Struktur
1464-42-2
CAS-Nr.
1464-42-2
Bezeichnung:
2-Amino-4-(methylselenyl)buttersure
Englisch Name:
DL-Selenomethionine
Synonyma:
Selenomethionine;Selenium methionine;seleniummethionine;Seleno-DL-methionine;C05335;DL-Se-Met;methionine,seleno;Methionine, seleno;DL-SELENOMETHIONINE;SELENOMETHIONINE 98+%
CBNumber:
CB4505790
Summenformel:
C5H11NO2Se
Molgewicht:
196.11
MOL-Datei:
1464-42-2.mol

2-Amino-4-(methylselenyl)buttersure Eigenschaften

Schmelzpunkt:
267-269 °C
Siedepunkt:
320.8±37.0 °C(Predicted)
storage temp. 
-20°C
L?slichkeit
almost transparency in 1mol/L HCl
pka
2.26±0.10(Predicted)
Aggregatzustand
solid
Farbe
White to Almost white
Wasserl?slichkeit
soluble
Merck 
14,8441
BRN 
1758204
NIST chemische Informationen
Butanoic acid, 2-amino-4-(methylseleno)-(1464-42-2)
EPA chemische Informationen
Butanoic acid, 2-amino-4-(methylseleno)- (1464-42-2)
Sicherheit
  • Risiko- und Sicherheitserkl?rung
  • Gefahreninformationscode (GHS)
Kennzeichnung gef?hrlicher T,N
R-S?tze: 23/25-33-50/53
S-S?tze: 20/21-28-45-60-61
RIDADR  UN 3283
WGK Germany  3
RTECS-Nr. ES7110000
HazardClass  6.1
PackingGroup  III
HS Code  2931909000
Giftige Stoffe Daten 1464-42-2(Hazardous Substances Data)
Bildanzeige (GHS) GHS hazard pictogramsGHS hazard pictogramsGHS hazard pictograms
Alarmwort Achtung
Gefahrenhinweise
Code Gefahrenhinweise Gefahrenklasse Abteilung Alarmwort Symbol P-Code
H373 Kann die Organe sch?digen bei l?ngerer oder wiederholter Exposition. Spezifische Zielorgan-Toxizit?t (wiederholte Exposition) Kategorie 2 Warnung P260, P314, P501
H410 Sehr giftig für Wasserorganismen mit langfristiger Wirkung. Langfristig (chronisch) gew?ssergef?hrdend Kategorie 1 Warnung GHS hazard pictogramssrc="/GHS09.jpg" width="20" height="20" /> P273, P391, P501
Sicherheit
P260 Dampf/Aerosol/Nebel nicht einatmen.
P264 Nach Gebrauch gründlich waschen.
P264 Nach Gebrauch gründlich waschen.
P273 Freisetzung in die Umwelt vermeiden.
P301+P310 BEI VERSCHLUCKEN: Sofort GIFTINFORMATIONSZENTRUM/Arzt/... (geeignete Stelle für medizinische Notfallversorgung vom Hersteller/Lieferanten anzugeben) anrufen.
P314 Bei Unwohlsein ?rztlichen Rat einholen / ?rztliche Hilfe hinzuziehen.

2-Amino-4-(methylselenyl)buttersure Chemische Eigenschaften,Einsatz,Produktion Methoden

R-S?tze Betriebsanweisung:

R23/25:Giftig beim Einatmen und Verschlucken.
R33:Gefahr kumulativer Wirkungen.
R50/53:Sehr giftig für Wasserorganismen, kann in Gew?ssern l?ngerfristig sch?dliche Wirkungen haben.

S-S?tze Betriebsanweisung:

S20/21:Bei der Arbeit nicht essen, trinken,rauchen.
S28:Bei Berührung mit der Haut sofort abwaschen mit viel . . . (vom Hersteller anzugeben).
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn m?glich, dieses Etikett vorzeigen).
S60:Dieses Produkt und sein Beh?lter sind als gef?hrlicher Abfall zu entsorgen.
S61:Freisetzung in die Umwelt vermeiden. Besondere Anweisungen einholen/Sicherheitsdatenblatt zu Rate ziehen.

Beschreibung

Selenomethionine is the major form of selenium in plant foods. Selenomethionine is identical to methionine, except that selenium replaces the sulfur atom. The selenium consumed as selenocysteine is broken down to form alanine and hydrogen selenide (H2Se). The breakdown pathway of selenomethion- ine is not clear. Although selenium does not occur to a great extent as selenite in foods, selenite is readily used as a source of the element by humans and animals. Selenium also occurs as selenate in foods such as beet leaves, garlic, and cabbage.
DL-Selenomethionine
DL-Selenomethionine is a selenium (Se) analogue of methionine in which sulfur is replaced with the trace element selenium. Selenomethionine (SeMet) can incorporate into proteins in place of methionine with no effects on protein structure and function, providing a mechanism for reversible Se storage in organs and tissues. Free selenium is incorporated into selenocysteine, an amino acid found in more than thirty selenoproteins including the glutathione peroxidases (GPx) enzymes, thioredoxin reductase (TR) and the iodothyronine deiodinase enzymes.

Verwenden

Selenium as selenite, DL-selenomethionine, and DL-selenocystine was equally effective in preventing liver necrosis, but factor 3 selenium was three times more effective than these forms (Burk, 1976; Schwarz and Foltz, 1958).

Biologische Funktion

Most selenium in animal tissues is present as selenomethionine or selenocysteine. Selenomethionine, which cannot be synthesized by humans and is initially synthesized in plants, is incorporated randomly in place of methionine in a variety of proteins obtained from plant and animal sources. Selenium is present in varying amounts in these proteins, which are called selenium-containing proteins.
Selenomethionine is not known to have a physiological function separate from that of methionine.
Selenocysteine is present in animal selenoproteins that have been characterized (see below) and is the form of selenium that accounts for the biological activity of the element. In contrast to selenomethionine, there is no evidence that selenocysteine substitutes for cysteine in humans.

Biologische Aktivit?t

Most dietary selenium is highly bioavailable. Selenomethionine, which is estimated to account for at least half of the dietary selenium, is absorbed by the same mechanism as methionine, and its selenium is made available for selenoprotein synthesis when it is catabolized via the transsulfuration pathway (Esaki et al., 1982). The bioavailability of selenium in the form of selenomethionine is greater than 90 percent (Thomson and Robinson, 1986). The selenium in selenocysteine, another significant dietary form, is also highly bioavailable (Swanson et al., 1991). There appear to be some minor dietary forms of selenium (especially present in fish) that have relatively low bioavailability, but these forms have not been identified (Cantor and Tarino, 1982). Selenate and selenite, two inorganic forms of selenium, have roughly equivalent bioavailability which generally exceeds 50 percent (Thomson and Robinson, 1986). Although they are not major dietary constituents, these inorganic forms are commonly used as selenium supplements.

Stoffwechsel

Selenomethionine, derived mainly from plants, enters the methionine pool in the body and shares the fate of methionine until catabolized by the transsulfuration pathway. The resulting free selenocysteine is further broken down with liberation of a reduced form of the element, which is designated selenide (Esaki et al., 1982). Ingested selenite, selenate, and selenocysteine are all apparently metabolized directly to selenide. This selenide may be associated with a protein that serves as a chaperone (Lacourciere and Stadtman, 1998). The selenide can be metabolized to selenophosphate, the precursor of selenocysteine in selenoproteins (Ehrenreich et al., 1992) and of selenium in transfer RNA (Veres et al., 1992), or it can be converted to excretory metabolites (Mozier et al., 1988), some of which have been characterized as methylated forms.

l?uterung methode

It crystallises in hexagonal plates from MeOH and H2O. [Klosterman & Painter J Am Chem Soc 69 2009 1949.] The L-isomer [3211-76-5] is purified by dissolving it in H2O, adjusting the pH to 5.5 with aqueous NH3, evaporating to near-dryness, and the residue is washed several times with absolute EtOH till a solid is formed and then recrystallise from Me2CO. It has m 266-268o(dec) [also 275o(dec)], and [] D +18.1o(c 1, N HCl). [Pande et al. J Org Chem 35 1440 1970, Beilstein 4 IV 3216.]

2-Amino-4-(methylselenyl)buttersure Upstream-Materialien And Downstream Produkte

Upstream-Materialien

Downstream Produkte


2-Amino-4-(methylselenyl)buttersure Anbieter Lieferant Produzent Hersteller Vertrieb H?ndler.

Global( 196)Lieferanten
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Hebei Weibang Biotechnology Co., Ltd
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TargetMol Chemicals Inc.
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marketing@targetmol.com United States 31991 58

1464-42-2(2-Amino-4-(methylselenyl)buttersure)Verwandte Suche:


  • 2-amino-4-(methylselenyl)-butyricaci
  • 2-amino-4-(methylselenyl)butyricacid
  • Butyric acid, 2-amino-4-(methylselenyl)-
  • Methionine, seleno
  • methionine,seleno
  • selenomethionine(van)
  • SELENOMETHIONINE (100 MG)
  • DL-SELENOMETHIONINE
  • SELENOMETHIONINE 98+%
  • Butanoic acid, 2-amino-4-(methylseleno)-
  • 2-amino-4-methylselanyl-butanoic acid
  • 2-Amino-4-(methylseleno)butanoic acid
  • Seleno-DL-Methionine >=99% (TLC)
  • DL-Selenomethionine
  • C05335
  • 2-amino-4-(methylseleno)-butanoicaci
  • 2-Amino-4-(methylselenyl)butyric acid
  • 1-BUTANOIC ACID 2-AMINO-4-(METHYL SELEN O
  • DL-Selenomethionine>
  • DL-Selenomethionine USP/EP/BP
  • DL-Se-Met
  • Selenomethionine (1611955)
  • Selenium methionine
  • seleniummethionine
  • Seleno-DL-methionine
  • Selenomethionine
  • Selenomethionine,DL-Selenomethionine
  • Selenium-selenomethionine
  • 1464-42-2
  • 203211-76-5
  • 2578-28-7
  • Methionine [Met, M]
  • Amino Acids
  • I - Z
  • Modified Amino Acids
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