L-Lactide Struktur

(3S-cis)-3,6-Dimethyl-1,4-dioxan-2,5-dion

Bezeichnung:(3S-cis)-3,6-Dimethyl-1,4-dioxan-2,5-dion

CAS-Nr4511-42-6

Englisch Name:L-Lactide

CBNumberCB4416791

SummenformelC6H8O4

Molgewicht144.13

MOL-Datei4511-42-6.mol

Synonyma

(3S-cis)-3,6-Dimethyl-1,4-dioxan-2,5-dion

(3S-cis)-3,6-Dimethyl-1,4-dioxan-2,5-dion physikalisch-chemischer Eigenschaften

Schmelzpunkt	92-94 °C(lit.)
Siedepunkt	255°C
Dichte	1.186±0.06 g/cm3(Predicted)
Dampfdruck	0.311Pa at 25℃
Brechungsindex	1.4475
storage temp.	2-8°C
Löslichkeit	Soluble in chloroform, and methanol. Slightly soluble in benzene.
Aggregatzustand	Solid
Farbe	White to Off-White
Optische Aktivität	[α]20/D 285°, c = 1 in toluene
Wasserlöslichkeit	16.7g/L at 20℃
Sensitive	Moisture Sensitive
BRN	82124
Stabilität	Hygroscopic
InChIKey	JJTUDXZGHPGLLC-IMJSIDKUSA-N
LogP	0.4 at 25℃
CAS Datenbank	4511-42-6(CAS DataBase Reference)
EPA chemische Informationen	1,4-Dioxane-2,5-dione, 3,6-dimethyl-, (3S,6S)- (4511-42-6)

Sicherheit

Kennzeichnung gefährlicher	Xi
R-Sätze:	36/37/38-36
S-Sätze:	26-37/39
WGK Germany	3
TSCA	Yes
HS Code	29322090

Gefahreninformationscode (GHS)

L-Lactide Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S37/39:Bei der Arbeit geeignete Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
Beschreibung
L-lactide (3,6-dimethyl-1,4-dioxane-2,5-dione) is a cyclic lactone that is derived from lactic acid. It has the molecular formula C3H6O2 and is an essential building block for synthesizing polylactic acid (PLA) plastics, which are widely used in the manufacturing industry.
Chemische Eigenschaften
White crystal
Verwenden
(3S)-cis-3,6-Dimethyl-1,4-dioxane-2,5-dione may be used in the synthesis of optically active terpyridine containing poly(L-lactide)s, polydisperse lactic acid oligomers, bicyclic and tricyclic lactide derivatives.
Application
L-Lactide is a monomer used to produce polylactic acid (PLA), which is a biodegradable thermoplastic that has many uses in the pharmaceutical industry. Additionally, L-Lactide can be used to modify existing drug carriers or create new ones from scratch. As such, the pharmaceutical industry relies heavily on L-Lactide for its versatile applications.
Flammability and Explosibility
Non flammable
läuterung methode
This is the cyclic dilactone of lactic acid. The (±)-cis-racemate has been distilled with b 142o/8mm; the distillate which solidifies gives yellow needles on recrystallisation from EtOH with m 128o, from Et2O with m 129o, or CHCl3 with m 126o , 1720-1740 cm-1. It hydrolyses in cold max H2O. [Carothers et al. J Am Chem Soc 54 772 1932]. A trans-form (probably RS,SR) has been reported which crystallises from Et2O with m 42-43o [Hummel et al. Acta Cryst (Sect B) 38 1679 1982]. The R,R -(+)-lactide has b 150o/2mm and crystallises from Et2O with m 95o , or m 96.5 -97.5o (from CHCl3) or m 97.7o (from EtOAc) and [] D +297o (c 1.2, *C6H6). The S,S-(-)-lactide has b 150o/2.5mm and crystallises from EtOAc with m 98.7o, or m 95o (from CHCl3) or m 96.5-97.5o (from CCl4) and []D -297o (c 1.2, *C6H6). [Toniolo et al. J Org Chem 35 6 1970, Beilstein 19 H 154, 19 I 179, 19 II 176, 19 IV 1927, 19/5 V 10.]

L-Lactide Upstream-Materialien And Downstream Produkte

(3S-cis)-3,6-Dimethyl-1,4-dioxan-2,5-dion Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

4511-42-6, L-Lactide Verwandte Suche:

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