γ-Valerolacton

Bezeichnung:γ-Valerolacton

CAS-Nr108-29-2

Englisch Name:γ-Valerolactone

CBNumberCB4285373

SummenformelC5H8O2

Molgewicht100.12

MOL-Datei108-29-2.mol

Synonyma

γ-Valerolacton

γ-Valerolacton physikalisch-chemischer Eigenschaften

Schmelzpunkt	−31 °C(lit.)
Siedepunkt	207-208 °C(lit.)
Dichte	1.05 g/mL at 25 °C(lit.)
Dampfdichte	3.45 (vs air)
Dampfdruck	30-44Pa at 20-25℃
Brechungsindex	n20/D 1.432(lit.)
FEMA	3103 \| GAMMA-VALEROLACTONE
Flammpunkt	204.8 °F
storage temp.	Sealed in dry,Room Temperature
Löslichkeit	Chloroform, Methanol
Aggregatzustand	Liquid
Farbe	Clear colorless
PH	7 (H2O, 20℃)
Geruch (Odor)	at 100.00 %. herbal sweet warm tobacco cocoa woody
Geruchsart	herbal
Wasserlöslichkeit	MISCIBLE
JECFA Number	220
BRN	80420
Dielectric constant	36.140000000000001
InChIKey	GAEKPEKOJKCEMS-UHFFFAOYSA-N
LogP	-0.27
CAS Datenbank	108-29-2(CAS DataBase Reference)
NIST chemische Informationen	2(3H)-Furanone, dihydro-5-methyl-(108-29-2)
EPA chemische Informationen	2(3H)-Furanone, dihydro-5-methyl- (108-29-2)

Sicherheit

Kennzeichnung gefährlicher	Xi
R-Sätze:	36-36/37/38
S-Sätze:	39-26-37/39
WGK Germany	2
RTECS-Nr.	LU3580000
TSCA	Yes
HS Code	29322980

Gefahreninformationscode (GHS)

γ-Valerolactone Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R36:Reizt die Augen.
S-Sätze Betriebsanweisung:
S39:Schutzbrille/Gesichtsschutz tragen.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
Aussehen Eigenschaften
C5H8O2; 4-Hydroxyvaleriansäure-gamma-lacton, Pentanolid. Farblose Flüssigkeit mit charakteristischem Geruch.
Gefahren für Mensch und Umwelt
Brennbar.
Nicht mit Säuren, Laugen und Oxidationsmitteln in Berührung bringen.
LD₅₀ (oral, Ratte) 8800 mg/kg
Schutzmaßnahmen und Verhaltensregeln
Schutzhandschuhe als kurzzeitiger Spritzschutz.
Verhalten im Gefahrfall
Mit flüssigkeitsbindendem Material aufnehmen. Der Entsorgung zuführen. Nachreinigen.
Kohlendioxid, Wasser.
Brennbar.
Erste Hilfe
Nach Hautkontakt: Mit reichlich Wasser abwaschen.
Nach Augenkontakt: Mit reichlich Wasser bei geöffnetem Lidspalt mindestens 15 Minuten ausspülen. Augenarzt hinzuziehen.
Nach Einatmen: Frischluft.
Nach Verschlucken: Reichlich Wasser trinken. Erbrechen auslösen. Arzt hinzuziehen.
Nach Kleidungskontakt: Kontaminierte Kleidung entfernen.
Ersthelfer: siehe gesonderten Anschlag
Sachgerechte Entsorgung
Als halogenfreie, organische Lösemittelabfälle.
Beschreibung
γ-Valerolactone (Item No. 28240) is an analytical reference standard categorized as a prodrug form of γ-hydroxyvaleric acid (GHV; ). This product is intended for research and forensic applications.
Chemische Eigenschaften
γ-Valerolactone has a sweet, herbaceous odor.
Chemische Eigenschaften
Colorless liquid. Surface tension 30 dynes/cm (25C), viscosity 2.18 cP (25C), pH (anhydrous): 7. pH (10% solution in distilled water): 4.2. Miscible with water and most organic solvents, resins, waxes, etc.; slightly misciblewith zein, beeswax, petrolatum; immiscible with anhydrous glycerin, glue, casein, arabic gum, and soybean protein. Combustible.
Occurrence
Reported found in boiled beef, beef fat, beer, cacao, Swiss cheese, ground and roasted coffee, roasted filberts, milk fat, dried mushroom, peach, roasted peanuts, heated pork fat, black tea and yogurt. Also reported found in peach, strawberry jam, tomato, wheaten bread, Gruyere cheese, heated butter, cooked beef, white wine, red wine, coffee and Bourbon vanilla.
Verwenden
γ-Valerolactone is a naturally occurring chemical found in fruits and is frequently used as a food additive. It can be converted to liquid alkenes which can be used as transportation fuels. γ-Valerolactone is widely used in dye baths (coupling agent), brake fluids, cutting oils, and as solvent for adhesives, insecticides, and lacquers.
Verwenden
It finds it application as a food additive that is used to improve the taste or odor of a food. It is also used as toiletry fragrances.
Verwenden
γ-valerolactone?(GVL) can be used as a green solvent:
- To transform lignocellulose into furfural using a solid acid catalyst, H-mordenite.
- To synthesize phosphatidylserine.
synthetische
By reduction of levulinic acid followed by cyclization.
Definition
ChEBI: Gamma-valerolactone is a butan-4-olide that is dihydrofuran-2(3H)-one substituted by a methyl group at position 5. It has been found in the urine samples of humans exposed to n-hexane. It has a role as a flavouring agent and a human xenobiotic metabolite.
Synthesis Reference(s)
Journal of the American Chemical Society, 112, p. 1286, 1990 DOI: 10.1021/ja00159a082
Tetrahedron Letters, 26, p. 5639, 1985 DOI: 10.1016/S0040-4039(01)80907-2
The Journal of Organic Chemistry, 50, p. 3930, 1985 DOI: 10.1021/jo00220a053
Allgemeine Beschreibung
γ-Valerolactone has been identified as one of the volatile flavor constituents in mango and honey.
Allgemeine Beschreibung
γ-Valerolactone?(GVL) is a dipolar aprotic, bio-based, fully degradable, non-toxic green solvent and has been aligned with "Safer Solvent and Auxiliaries"," Use of Renewable Feedstocks and Design for Degradation".
Reaktivität anzeigen
gamma-Valerolactone is an ester. Esters react with acids to liberate heat along with alcohols and acids. Strong oxidizing acids may cause a vigorous reaction that is sufficiently exothermic to ignite the reaction products. Heat is also generated by the interaction of esters with caustic solutions. Flammable hydrogen is generated by mixing esters with alkali metals and hydrides. gamma-Valerolactone is incompatible with strong oxidizers. . gamma-Valerolactone is incompatible with strong oxidizing agents. gamma-Valerolactone is also incompatible with strong acids, strong bases and strong reducing agents. .
Biochem/physiol Actions
Odor at 1%
Sicherheitsprofil
Moderately toxic by ingestion. A skin irritant. Mutation data reported. Combustible liquid when exposed to heat or flame; can react with oxidizing materials. To fight fire, use water, foam, CO2, dry chemical. When heated to decomposition it emits acrid smoke and irritating fumes.
läuterung methode
Purify the -lactone by repeated fractional distillation [Boorman & Linstead J Chem Soc 577, 580 1933]. IR: max 1790 (CS2), 1775 (CHCl3) cm-1 [Jones et al. Can J Chem 3 7 2007 1959]. The BF3-complex distils at 110-111o/20mm [Reppe et al. Justus Liebigs Ann Chem 596 179 1955]. It is characterized by conversion to -hydroxy-n-valeramide on treatment with NH3, m 51.5-52o (by slow evaporation of a CHCl3 solution). [Beilstein 17 H 235, 17 I 131, 17 II 288, 17 III/IV 4176, 17/9 V 24.]

γ-Valerolactone Upstream-Materialien And Downstream Produkte

γ-Valerolacton Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

108-29-2, γ-Valerolactone Verwandte Suche:

Send Inquriy