L-Arabinopyranose

Bezeichnung:L-Arabinopyranose

CAS-Nr87-72-9

Englisch Name:L-Arabinose

CBNumberCB7277012

SummenformelC5H10O5

Molgewicht150.13

MOL-Datei87-72-9.mol

Synonyma

L-Arabinopyranose

L-Arabinopyranose physikalisch-chemischer Eigenschaften

Schmelzpunkt	160-163 °C(lit.)
Siedepunkt	191.65°C (rough estimate)
alpha	103 º (c=5, H2O)
Dichte	1.1897 (rough estimate)
Brechungsindex	1.3920 (estimate)
storage temp.	Inert atmosphere,Room Temperature
Löslichkeit	Methanol (Slightly), Water (Sparingly)
pka	12.26±0.70(Predicted)
Aggregatzustand	Fine Crystalline Powder
Farbe	White
Optische Aktivität	+190.6 → +104.5
Wasserlöslichkeit	soluble
Merck	14,761
BRN	1723085
CAS Datenbank	87-72-9(CAS DataBase Reference)
NIST chemische Informationen	Arabinose(L)(87-72-9)
EPA chemische Informationen	L-Arabinopyranose (87-72-9)

Sicherheit

Kennzeichnung gefährlicher	Xn
R-Sätze:	20/21/22-36/37/38
S-Sätze:	24/25-36-26
WGK Germany	3
F	3-10
TSCA	Yes
HS Code	29400000

Gefahreninformationscode (GHS)

L-Arabinose Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R20/21/22:Gesundheitsschädlich beim Einatmen,Verschlucken und Berührung mit der Haut.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
S-Sätze Betriebsanweisung:
S24/25:Berührung mit den Augen und der Haut vermeiden.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
Chemische Eigenschaften
White to off white crystalline powder
Verwenden
L-(+)-Arabinose is used to identify and differentiate and characterize pentose sugar isomerase. It is also used as the carbon source in microbial culture. It is involved in the bioproduction of L-ribose. It finds application in the production of savory reaction flavors. Its derivatives are used in the development of antiviral agents such as nucleoside. It acts as a base component of hemicellulose and pectin.
Verwenden
A base component of hemicellulose and pectin, critical biopolymers.
Definition
ChEBI: L-arabinopyranose is the six-membered ring form of L-arabinose. It has a role as an Escherichia coli metabolite and a mouse metabolite.
läuterung methode
beta-L-(+)-Arabinose is recrystallised slowly, twice, from 80% aqueous EtOH, then dried under vacuum over P2O5. It can also be purified by heating the arabinose (200g) with glacial acetic acid (300mL) on a boiling water bath for 45minutes, cooling, filtering, washing with 95% EtOH (500mL) in four portions and drying at 56-60o over P2O5. It has been recrystallised from 5times its weight of 76% EtOH using charcoal (10g) to yield 127g, m 155-157o, [] 20D +190.6o and mutarotating to +104o (c 4, H2O). [Anderson & Sands Org Synth Coll Vol I 67 1941, Wolfrom & Christian J Am Chem Soc 48 3172 1926, Beilstein 1 IV 4217.]
Mode of action
L-arabinose has been shown to slow down glucose absorption by inhibiting the intestinal enzyme sucrase in an uncompetitive manner. Sucrase is present in the brush border of the intestine and critical for hydrolysing sucrose into a glucose and fructose molecule[1].
Mode of action
[1] Korrie Pol, Monica Mars, Marie-Luise Puhlmann. “Efficacy of L-Arabinose in Lowering Glycemic and Insulinemic Responses: The Modifying Effect of Starch and Fat.” Foods (2022).

L-Arabinopyranose Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

87-72-9, L-Arabinose Verwandte Suche:

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