5,7-Dihydroxy-4-methyl-2-benzopyron

Bezeichnung:5,7-Dihydroxy-4-methyl-2-benzopyron

CAS-Nr2107-76-8

Englisch Name:5,7-Dihydroxy-4-methylcoumarin

CBNumberCB1734603

SummenformelC10H8O4

Molgewicht192.17

MOL-Datei2107-76-8.mol

Synonyma

5,7-Dihydroxy-4-methyl-2-benzopyron

5,7-Dihydroxy-4-methyl-2-benzopyron physikalisch-chemischer Eigenschaften

Schmelzpunkt	296-299 °C (lit.)
Siedepunkt	472.1±14.0 °C(Predicted)
Dichte	1.456±0.06 g/cm3(Predicted)
storage temp.	-20°C Freezer, Under inert atmosphere
Löslichkeit	DMSO (Slightly), Methanol (Slightly)
pka	7.29±0.20(Predicted)
Aggregatzustand	Solid
Farbe	Off-White to Pale Green
Sensitive	Light Sensitive
maximale Wellenlänge (λmax)	322nm(MeOH)(lit.)
BRN	179133
InChIKey	QNVWGEJMXOQQPM-UHFFFAOYSA-N
CAS Datenbank	2107-76-8(CAS DataBase Reference)
EPA chemische Informationen	5,7-Dihydroxy-4-methylcoumarin (2107-76-8)

Sicherheit

Kennzeichnung gefährlicher	Xi
R-Sätze:	36/37/38
S-Sätze:	26-36
WGK Germany	3
TSCA	Yes
HazardClass	IRRITANT
HS Code	29321900
Giftige Stoffe Daten	2107-76-8(Hazardous Substances Data)

Gefahreninformationscode (GHS)

5,7-Dihydroxy-4-methylcoumarin Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
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.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
Chemische Eigenschaften
White metallic powder
Verwenden
5,7-Dihydroxy-4-methylcoumarin may be used in the synthesis of pyrano[2,3-h]coumarin derivatives and 5,7-dihydroxy-8-formyl-4-methylcoumarin.
Definition
ChEBI: 5,7-Dihydroxy-4-methylcoumarin is a hydroxycoumarin.
Allgemeine Beschreibung
Yellow powder. Fluoresces blue. Absorbs ultraviolet light.
Air & Water Reaktionen
Slightly water soluble .
Reaktivität anzeigen
5,7-Dihydroxy-4-methylcoumarin is a phenol and lactone. Phenols do not behave as organic alcohols, as one might guess from the presence of a hydroxyl (-OH) group in their structure. Instead, they react as weak organic acids. Phenols and cresols are much weaker as acids than common carboxylic acids (phenol has Ka = 1.3 x 10^[-10]). These materials are incompatible with strong reducing substances such as hydrides, nitrides, alkali metals, and sulfides. Flammable gas (H2) is often generated, and the heat of the reaction may ignite the gas. Heat is also generated by the acid-base reaction between phenols and bases. Such heating may initiate polymerization of the organic compound. Phenols are sulfonated very readily (for example, by concentrated sulfuric acid at room temperature). The reactions generate heat. Phenols are also nitrated very rapidly, even by dilute nitric acid. Lactones react similarly to esters. 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.
Brandgefahr
Flash point data for 5,7-Dihydroxy-4-methylcoumarin are not available. 5,7-Dihydroxy-4-methylcoumarin is probably combustible.

5,7-Dihydroxy-4-methylcoumarin Upstream-Materialien And Downstream Produkte

5,7-Dihydroxy-4-methyl-2-benzopyron Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

2107-76-8, 5,7-Dihydroxy-4-methylcoumarin Verwandte Suche:

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