l-(+)-Milchsaeure

Bezeichnung:l-(+)-Milchsaeure

CAS-Nr79-33-4

Englisch Name:L(+)-Lactic acid

CBNumberCB1138319

SummenformelC3H6O3

Molgewicht90.08

MOL-Datei79-33-4.mol

Synonyma

l-(+)-Milchsaeure

l-(+)-Milchsaeure physikalisch-chemischer Eigenschaften

Schmelzpunkt	52-54°C
Siedepunkt	125 °C
alpha	-13.5 º (c=2.5, 1.5N NaOH)
Dichte	1.206 g/mL at 25 °C
Dampfdruck	0.038Pa at 25℃
Brechungsindex	n20/D 1.427
FEMA	2611 \| LACTIC ACID
Flammpunkt	>230 °F
storage temp.	2-8°C
Löslichkeit	H₂O: 10 mg/mL, clear, colorless
pka	pK at 25°, 3.79
Aggregatzustand	Powder/Solid
Farbe	White
Geruch (Odor)	odorless acidic
Geruchsart	odorless
Optische Aktivität	[α]20/D 13.5°, c = 2.5 in 1.5 M NaOH
Wasserlöslichkeit	SOLUBLE
Sensitive	Hygroscopic
JECFA Number	930
Merck	14,5337
BRN	1720251
InChIKey	JVTAAEKCZFNVCJ-REOHCLBHSA-N
LogP	-0.54 at 20℃
CAS Datenbank	79-33-4(CAS DataBase Reference)
NIST chemische Informationen	(s)-2-Hydroxypropanoic acid(79-33-4)
EPA chemische Informationen	L-Lactic acid (79-33-4)

Sicherheit

Kennzeichnung gefährlicher	Xi,C
R-Sätze:	38-41-34-36/37/38-36-35
S-Sätze:	26-39-45-36/37/39-36
RIDADR	3261
WGK Germany	1
RTECS-Nr.	OD2800000
F	3-10
TSCA	Yes
HazardClass	8
PackingGroup	III
HS Code	29181100
Toxizität	LD50 intraperitoneal in mouse: 3194mg/kg

Gefahreninformationscode (GHS)

L(+)-Lactic acid Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R38:Reizt die Haut.
R41:Gefahr ernster Augenschäden.
R34:Verursacht Verätzungen.
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.
S39:Schutzbrille/Gesichtsschutz tragen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
Chemische Eigenschaften
Crystalline Solid
Verwenden
Lactic acid has been used:
- as a component in substrate solution II for lactate dehydrogenase reaction
- as an additive in storage solution A
- as a supplement in the artificial gastric juice preparation for evaluation of degree of resistance Lactobacillus to the gastric stresses
Verwenden
It is most commonly used for fluid resuscitation after blood loss due to trauma, surgery, or burn injury. It is used in the agricultural, chemical, leather processing, pharmaceuticals, and cosmetics industries, used as an electroplating agent, food/feed additive, pH regulator, cleaning/washing agent, and tanning agent; used to flavor animal feeds; used as a solvent and intermediate in chemical production, as a pH regulator in fabric finishing, and in paints, coatings, soaps, and cleaning products; used to make large scale and fine chemicals, pulp-paper-paper products, food products, and plastic products, in mining, health services, agriculture-forestry-fishing, and building and construction work.
Verwenden
Occurs in small quantities in the blood and muscle fluid of man and animals. The lactic acid concentration increases in muscle and blood after vigorous activity. L-(+)-Lactic acid is also present in liver, kidney, thymus gland, human amniotic fluid, and o
Definition
ChEBI: An optically active form of lactic acid having (S)-configuration.
Allgemeine Beschreibung
L-(+)-Lactic acid is the only naturally occurring lactic acid in humans and mammals. Commercially, few bacteria like Lactobacillus casei, L. delbrueckii, Streptococcus lactis produces L-Lactic acid by fermentation process. Lactic acid activates hydroxycarboxylic acid receptor, G-protein coupled receptor 81 (GPR81).
Flammability and Explosibility
Not classified
Biochem/physiol Actions
L-(+)-Lactic acid is used as a substrate for lactic acid dehydrogenase and lactate oxidase.
läuterung methode
Purify lactic acid by fractional distillation at 0.1mm pressure, followed by fractional crystallisation from diethyl ether/isopropyl ether (1:1, dried with sodium). [Borsook et al. J Biol Chem 102 449 1933.] The solvent mixture, *benzene/diethyl ether (1:1) containing 5% pet ether (b 60-80o) has also been used. [Brin Biochemical Preparations 3 61 1953, Beilstein 3 IV 633.]

L(+)-Lactic acid Upstream-Materialien And Downstream Produkte

l-(+)-Milchsaeure Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

79-33-4, L(+)-Lactic acid Verwandte Suche:

Send Inquriy