1-Benzopyran-2-on

Gefahreninformationscode (GHS)

• Bildanzeige (GHS)

  

• Alarmwort

  Achtung

• Gefahrenhinweise

  H317：Kann allergische Hautreaktionen verursachen.

• Sicherheit

  P261：Einatmen von Staub vermeiden.

  P264：Nach Gebrauch gründlich waschen.

  P264：Nach Gebrauch gründlich waschen.

  P270：Bei Gebrauch nicht essen, trinken oder rauchen.

  P280：Schutzhandschuhe/Schutzkleidung/Augenschutz tragen.

  P301+P310：BEI VERSCHLUCKEN: Sofort GIFTINFORMATIONSZENTRUM/Arzt/... (geeignete Stelle für medizinische Notfallversorgung vom Hersteller/Lieferanten anzugeben) anrufen.

Coumarin Chemische Eigenschaften,Einsatz,Produktion Methoden

• ERSCHEINUNGSBILD

  FARBLOSE FLOCKEN MIT CHARAKTERISTISCHEM GERUCH.

• ARBEITSPLATZGRENZWERTE

  TLV nicht festgelegt.
  MAK nicht festgelegt.
  

• AUFNAHMEWEGE

  Aufnahme in den Körper durch Inhalation des Aerosols, über die Haut und durch Verschlucken.

• INHALATIONSGEFAHREN

  Verdampfen bei 20°C vernachlässigbar; eine belästigende Partikelkonzentration in der Luft kann jedoch schnell erreicht werden.

• WIRKUNGEN BEI KURZZEITEXPOSITION

  WIRKUNGEN BEI KURZZEITEXPOSITION:
  Die Substanz reizt die Haut.

• WIRKUNGEN NACH WIEDERHOLTER ODER LANGZEITEXPOSITION

  Möglicherweise krebserzeugend für den Menschen.

• LECKAGE

  Reste sorgfältig sammeln. An sicheren Ort bringen. Persönliche Schutzausrüstung: Atemschutzgerät, P2-Filter für schädliche Partikel.

• R-Sätze Betriebsanweisung:

  R22:Gesundheitsschädlich beim Verschlucken.
  R40:Verdacht auf krebserzeugende Wirkung.
  R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
  R20/21/22:Gesundheitsschädlich beim Einatmen,Verschlucken und Berührung mit der Haut.
  R43:Sensibilisierung durch Hautkontakt möglich.

• S-Sätze Betriebsanweisung:

  S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
  S36/37:Bei der Arbeit geeignete Schutzhandschuhe und Schutzkleidung tragen.
  S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.

• Beschreibung

  Coumarin is a naturally occurring Benzopyrone compound. It is found in a large number of plants belonging to many different families including tonka beans, woodruff, lavender oil, cassia, melilot (sweet clover), and other plants. It is found in edible plants such as strawberries, cinnamon, peppermint, green tea, carrots, and celery, as well as in partially fermented tea, red wine, beer, and other foodstuffs. Concentrations range from 87 000 ppm in cassia and 40 000 ppm in cinnamon to 20 ppm in peppermint and 5 ppb in tangerines.

• Chemische Eigenschaften

  WHITE CRYSTALS OR CRYSTALLINE POWDER

• Chemische Eigenschaften

  Coumarin occurs widely in nature and determines, for example, the odor of woodruff. It forms white crystals (mp 70.6°C) with a hay-like, spicy odor. When treated with dilute alkali, coumarin is hydrolyzed to the corresponding coumarinic acid salt [(Z)-2-hydroxycinnamic acid]. Heating with concentrated alkali or with sodium ethanolate in ethanol results in the formation of o-coumaric acid salts [(E)-2-hydroxycinnamic acid]. 3,4-Dihydrocoumarin is obtained by catalytic hydrogenation, for example, with Raney nickel as a catalyst; octahydrocoumarin is obtained if hydrogenation is carried out at high temperature (200–250°C).

• Chemische Eigenschaften

  Coumarin has a sweet, fresh, hay-like, odor similar to vanilla seeds, and a burning taste with bitter undertone and nutlike flavor on dilution.

• Occurrence

  Found in many plants and essential oils such as cassia, melilot, orchid, lavender and balsam of Peru (Sp?th, 1937; Gildemeister & Hoffman, 1966).

• Verwenden

  coumarin is considered a blood thinner, it can also increase blood flow. Some sources cite anti-oxidant capacities, as well. It is a specific plant constituent and is what creates the fragrance of freshly mowed hay. Coumarin is found in such plants as cherries, lavender, licorice, and sweet clover.

• Verwenden

  Pharmaceutic aid (flavor). Found in tonka beans, levender oil, woodruff, sweet clover.

• Verwenden

  antineoplastic, antiinflammatory, antihyperglycaemic

• Definition

  ChEBI: A chromenone having the keto group located at the 2-position.

• synthetische

  Coumarin is currently produced by Perkin synthesis from salicylaldehyde. In the presence of sodium acetate, salicylaldehyde reacts with acetic anhydride to produce coumarin and acetic acid. The reaction is carried out in the liquid phase at elevated temperature.
  A process for the production of coumarin from hexahydrocoumarin by dehydrogenation has also been elaborated.
  Since the odor of coumarin is relatively weak, strong-smelling by-products (e.g., vinylphenol) must be removed. Many purification methods have been reported and patented.

• Definition

  A colorless crystalline compound with a pleasant odor, used in making perfumes. On hydrolysis with sodium hydroxide it forms coumarinic acid.

• Aroma threshold values

  Detection at 34 to 50 ppb; recognition, 250 ppb

• Synthesis Reference(s)

  The Journal of Organic Chemistry, 27, p. 4704, 1962 DOI: 10.1021/jo01059a541
  Tetrahedron Letters, 27, p. 3911, 1986 DOI: 10.1016/S0040-4039(00)83914-3

• Allgemeine Beschreibung

  Colorless crystals, flakes or colorless to white powder with a pleasant fragrant vanilla odor and a bitter aromatic burning taste.

• Air & Water Reaktionen

  Insoluble in water.

• Reaktivität anzeigen

  Coumarin is sensitive to exposure to light. Coumarin is also sensitive to heat. Coumarin is incompatible with strong acids, strong bases and oxidizers. Coumarin is hydrolyzed by hot concentrated alkalis. Coumarin can be halogenated, nitrated and hydrogenated (in the presence of catalysts).

• Hazard

  Toxic by ingestion; carcinogenic. Use in food products prohibited (FDA). Questionable carcinogen.

• Health Hazard

  SYMPTOMS: Exposure to Coumarin may cause narcosis. It may also cause irritation and liver damage.

• Brandgefahr

  Coumarin is combustible.

• Flammability and Explosibility

  Non flammable

• Biologische Aktivität

  Oral anticoagulants can be prepared from compounds with coumarin as a base. Coumarin has been known for well over a century and, in addition to its use pharmaceutically, it is also an excellent odor-enhancing agent. However, because of its toxicity, it is not permitted in food products in the United States (Food and Drug Administration). One commercial drug is 3-(alpha-acetonyl-4-nitrobenzyl)- 4-hydroxycoumarin. This drug reduces the concentration of prothrombin in the blood and increases the prothrombin time by inhibiting the formation of prothrombin in the liver. The drug also interferes with the production of factors VII, IX, and X, so that their concentration in the blood is lowered during therapy. The inhibition of prothrombin involves interference with the action of vitamin K, and it has been postulated that the drug competes with vitamin K for an enzyme essential for prothrombin synthesis. Another commercial drug is bis-hydroxy-coumarin, C19H12O6. The actions of this drug are similar to those just described.

• Kontakt-Allergie

  Coumarin is an aromatic lactone naturally occurring in Tonka beans and other plants. As a fragrance allergen, it has to be mentioned by name in cosmetics within the EU

• Sicherheitsprofil

  Poison by ingestion, intraperitoneal, and subcutaneous routes. Questionable carcinogen with experimental tumorigenic data. Experimental teratogenic effects. Mutation data reported. Combustible when exposed to heat or flame. When heated to decomposition it emits acrid smoke and fumes. See also KETONES and ANHYDRIDES.

• Synthese

  May be extracted from tonka beans; from salicylaldehyde and acetic anhydride in the presence of sodium acetate; also from o-cresol and carbonyl chloride followed by chlorination of the carbonate and fusion with a mixture of alkali acetate, acetic anhydride and a catalyst.

• Environmental Fate

  Coumarin toxicity is a function of blood and target tissue levels of coumarin relative to the metabolic capacity of the target organ. Cellular toxicity results when the formation of the toxic moieties exceeds the capacity of the cell to detoxify. This can have significant impact when comparing dosing by gavage to dietary exposure.

• läuterung methode

  Coumarin crystallises from ethanol or water and sublimes in vacuo at 43o [Srinivasan & deLevie J Phys Chem 91 2904 1987]. [Beilstein 17/10 V 143.]

• Toxicity evaluation

  Coumarin is readily biodegradable. Coumarin is unlikely to bind to soil. Coumarin does not bioaccumulate; the bioconcentration factor has been determined to be <10–40. Various environmental fate studies have shown that coumarin in the environment would biodegrade and be lost to volatilization. Losses resulting from photolysis may also occur.

Coumarin Upstream-Materialien And Downstream Produkte

1-Benzopyran-2-on Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

Global(778)Suppliers

91-64-5, Coumarin Verwandte Suche: