5,7-Dihydroxy-4-methyl-2-benzopyron
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- CAS-Nr.
- 2107-76-8
- Bezeichnung:
- 5,7-Dihydroxy-4-methyl-2-benzopyron
- Englisch Name:
- 5,7-Dihydroxy-4-methylcoumarin
- Synonyma:
- NSC2440;NSC 2440;NSC-2440;4-Methyllimetol;Methyl-2H-Chromen-2-One;Dihydroxy 4-methylcoumarin;5,7-dihydroxy-4-methyl-coumari;5,7-DIHYDROXY-4-METHYLCOUMARIN;4-METHYL-5,7-DIHYDROXYCOUMARIN;DIHYDROXY-4-METHYLCOUMARIN, 5,7-
- CBNumber:
- CB1734603
- Summenformel:
- C10H8O4
- Molgewicht:
- 192.17
- MOL-Datei:
- 2107-76-8.mol
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5,7-Dihydroxy-4-methyl-2-benzopyron 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
- maximale Wellenlänge (λmax)
- 322nm(MeOH)(lit.)
- Sensitive
- Light Sensitive
- 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
- Risiko- und Sicherheitserklärung
- Gefahreninformationscode (GHS)
| Bildanzeige (GHS) |
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| Alarmwort |
Warnung |
| Gefahrenhinweise |
| Code |
Gefahrenhinweise |
Gefahrenklasse |
Abteilung |
Alarmwort |
Symbol |
P-Code |
| H302 |
Gesundheitsschädlich bei Verschlucken. |
Akute Toxizität oral |
Kategorie 4 |
Warnung |
![GHS hazard pictograms]() src="/GHS07.jpg" width="20" height="20" /> |
P264, P270, P301+P312, P330, P501 |
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| Sicherheit |
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5,7-Dihydroxy-4-methyl-2-benzopyron 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.
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-methyl-2-benzopyron Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
5,7-Dihydroxy-4-methyl-2-benzopyron Anbieter Lieferant Produzent Hersteller Vertrieb Händler.
Global( 182)Lieferanten
2107-76-8(5,7-Dihydroxy-4-methyl-2-benzopyron)Verwandte Suche:
- 5,7-Dihydroxy-4-methylcoumarin ,98%
- 5,7-Dihydroxy-4-methyl-2H-1-benzopyran-2-one
- 5,7-Dihydroxy-4-methyl-2-chromenone
- Coumarin, 5,7-dihydroxy-4-methyl-
- DIHYDROXY-4-METHYLCOUMARIN, 5,7-
- DIHYDROXY-4-METHYLCOUMARIN, 5,7-(RG)
- 4-METHYL-5,7-DIHYDROXYCOUMARIN
- 5,7-DIHYDROXY-4-METHYL-2H-CHROMEN-2-ONE
- 5,7-DIHYDROXY-4-METHYLCOUMARIN
- 5,7-dihydroxy-4-methyl-2h-1-benzopyran-2-on
- 5,7-dihydroxy-4-methyl-coumari
- 5,7-dihydroxy-4-methyl-2-benzopyrone
- 4-METHYL-5,7-DIHYDROXYCOUMARIN 97%
- 5,7-Dihydroxy-4-methylchromen-2-one
- 4-Methyllimetol
- 2H-1-Benzopyran-2-one, 5,7-dihydroxy-4-methyl
- 5,7-Dihydroxy-4-methylcoumarin monohydrate
- Methyl-2H-Chromen-2-One
- 5,7-dihydroxy-4-methyl-1H-chromen-2-one
- 5,7-Dihydroxy-4-methylcoumarin ISO 9001：2015 REACH
- NSC 2440
- NSC2440
- NSC-2440
- JRH-05201, 5,7-Dihydroxy-4-methyl-2H-chromen-2-one, 97%
- 5,7-Dihydroxy 4-methylcoumarin-RM
- Dihydroxy 4-methylcoumarin
- 2107-76-8
- 217-76-8
- C10H8O4H2O
- Heterocyclic Building Blocks
- Coumarins
- Building Blocks
- Building Blocks
- Chemical Synthesis
- Heterocyclic Building Blocks
- Building Blocks
- Heterocyclic Building Blocks
- Coumarins
