Diethyloxalat Chemische Eigenschaften,Einsatz,Produktion Methoden
R-S?tze Betriebsanweisung:
R22:Gesundheitssch?dlich beim Verschlucken.
R36:Reizt die Augen.
S-S?tze Betriebsanweisung:
S23:Gas/Rauch/Dampf/Aerosol nicht einatmen(geeignete Bezeichnung(en) vom Hersteller anzugeben).
Aussehen Eigenschaften
C6H10O4; Diethyloxalat. Farblose, aromatisch riechende Flüssigkeit.
Gefahren für Mensch und Umwelt
Gesundheitsschädlich beim Verschlucken. Reizt die Augen. Zersetzt sich mit Wasser zu Oxalsäure und Ethanol. Führt nach Aufnahme zu Erbrechn und Krämpfen. Inhalation kann zu Rausch bis Narkose führen. Schädigt Leber und Nieren. Kann Anämie bewirken.
Nicht mit Oxidationsmitteln in Berührung bringen.
LD
50 (oral, Ratte): 400 mg/kg.
Schutzma?nahmen und Verhaltensregeln
Schutzhandschuhe als kurzzeitiger Spritzschutz.
Verhalten im Gefahrfall
Dämpfe nicht einatmen.
Mit flüssigkeitsbindendem Material, z.B. Rench Rapid aufnehmen. Der Entsorgung zuführen. Nachreinigen.
Kohlendioxid, Wasser, Pulver, Schaum.
Brennbar.
Erste Hilfe
Nach Hautkontakt: Mit reichlich Wasser abwaschen.
Nach Augenkontakt: Mit reichlich Wasser bei geöffnetem Lidspalt mindestens 15 Minuten ausspülen. Sofort Augenarzt hinzuziehen.
Nach Einatmen: Frischluft.
Nach Verschlucken: Reichlich Wasser trinken lassen. Erbrechen auslösen. Arzt hinzuziehen.
Nach Kleidungskontakt: Kontaminierte Kleidung sofort entfernen.
Ersthelfer: siehe gesonderten Anschlag
Sachgerechte Entsorgung
Als halogenfreie, organische Lösemittelabfälle.
Chemische Eigenschaften
colourless liquid
Verwenden
Diethyl oxalate is used to prepare active pharmaceutical ingredients (API), plastics and dyestuff intermediates. It is also used as a solvent for cellulose esters, ethers, resins, perfumes and lacquers for electronics. It is involved in the transesterification reaction with phenol to get dipheny oxalate. It is also involved in the Claisen condensation ketosteroids to prepare glyoxalyl derivatives. Further, it is used to prepare sym-1,4-diphenyl-1,4-dihydro-1,2,4,5-polytetrazine. In addition to this, it is utilized in the microemulsion synthesis of zinc oxide nanoparticles.
Vorbereitung Methode
Diethyl oxalate is produced via esterification of ethanol and
oxalic acid. It is a preferred solvent for cellulose acetate and
nitrate.
Allgemeine Beschreibung
A colorless liquid. Flash point 168°F. Slightly denser than water and insoluble in water. Hence sinks in water. May irritate skin and mucous membranes; may be mildly toxic by ingestion; may emit irritating fumes in a fire. Vapors are much heavier than air. Used as a solvent for plastics and in the manufacture of perfumes and pharmaceuticals.
Air & Water Reaktionen
Insoluble in water.
Reaktivit?t anzeigen
Diethyl oxalate 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
Hazard
Toxic by ingestion, strong irritant to skin
and mucous membranes.
Health Hazard
TOXIC; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance may cause severe injury, burns or death. Contact with molten substance may cause severe burns to skin and eyes. Reaction with water or moist air will release toxic, corrosive or flammable gases. Reaction with water may generate much heat that will increase the concentration of fumes in the air. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution.
Brandgefahr
Combustible material: may burn but does not ignite readily. Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff. When heated, vapors may form explosive mixtures with air: indoors, outdoors and sewers explosion hazards. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapors may travel to source of ignition and flash back. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water.
Sicherheitsprofil
Poison by ingestion.
Flammable liquid when exposed to heat or
flame; can react with oxidzing materials. To
fight fire, use foam, CO2, dry chemical.
When heated to decomposition it emits
acrid smoke and fumes. See also
OXALATES and ESTERS.
Diethyloxalat Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
ETHYL 1-METHYL-5-PROPYL-1H-PYRAZOLE-3-CARBOXYLATE
5-TERT-BUTYL-1H-PYRAZOLE-3-CARBOXYLIC ACID
3-Phenyl-1H-pyrazole-5-carboxamide ,97%
Ethyl 3-(3-chlorophenyl)-1H-pyrazole-5-carboxylate ,97%
5-(3-CHLOROPHENYL)-1H-PYRAZOLE-3-CARBOXYLIC ACID
ETHYL 5-(3-NITROPHENYL)-1H-PYRAZOLE-3-CARBOXYLATE
ETHYL 2,4-DIOXOHEPTANOATE
5-Fluor-1H-indol-2-carbonsure
3-(4-Methoxyphenyl)-1H-pyrazole-5-carboxamide ,97%
1-Methyl-5-propyl-1H-pyrazole-3-carboxylic acid amide ,97%
ETHYL 5-(2-FURYL)-1H-PYRAZOLE-3-CARBOXYLATE
Ethyl-5-methylisoxazol-3-carboxylat
Ethyl 5-(tert-butyl)-2H-pyrazole-3-carboxylate
3-(4-CHLOROPHENYL)-1H-PYRAZOLE-5-CARBOHYDRAZIDE
ETHYL A-ETHOXYOXALYLPHENYL ACETATE
5-Chlorindol
5-METHYL-1 H-PYRAZOLE-3-CARBOXYLIC ACID HYDRAZIDE
Ethyl-2,4-dioxovalerat
2，2-dichloro-1-(4-ethyoxy phenyl)cy-clopropane carboxylic acid
Dinatrium-5,5'-[(2-hydroxytrimethylen)bis(oxy)]bis[4-oxo-4H-1-benzopyran-2-carboxylat]
dimethyl 4-chloropyridine-2,6-dicarboxylate
4-Fluoroindole
5-(4-METHOXY-PHENYL)-2H-PYRAZOLE-3-CARBOXYLIC ACID ETHYL ESTER
Gliclazid
Ethyl 5-thien-2-yl-1H-pyrazole-3-carboxylate
Imazamox
1-METHYL-3-PROPYLPYRAZOLE-5-CARBOXYLIC ACID
ETHYL 3-(4-CHLOROPHENYL)-1H-PYRAZOLE-5-CARBOXYLATE
Ethyl-2,4-dioxohexanoat
Ethyl 3-(5-methylfuran-2-yl)-1H-pyrazole-5-carboxylate ,97%
OROTIC ACID MONOHYDRATE
1-METHYL-5-PROPYL-1H-PYRAZOLE-3-CARBOXYLIC ACID
5-PHENYL-2H-PYRAZOLE-3-CARBOXYLIC ACID ETHYL ESTER
ETHYL 1,3-BENZOTHIAZOLE-2-CARBOXYLATE
Diethyl-2-methyloxosuccinat
5-Methyl-1H-pyrazole-3-carboxylic acid
4-BROMO-5-METHYL-1H-PYRAZOLE-3-CARBOXYLIC ACID
4-Oxo-4H-pyran-2,6-dicarbonsure
ETHYL 2-(1-METHYL-1H-IMIDAZOL-2-YL)-2-OXOACETATE
3-(tert-Butyl)-1H-pyrazole-5-carbohydrazide
