γ-Valerolacton Chemische Eigenschaften,Einsatz,Produktion Methoden
R-S?tze Betriebsanweisung:
R36:Reizt die Augen.
S-S?tze 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.
LD
50 (oral, Ratte) 8800 mg/kg
Schutzma?nahmen 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.
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.
synthetische
By reduction of levulinic acid followed by cyclization.
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".
Reaktivit?t 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. .
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.
l?uterung 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-Valerolacton Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
