5,7-Dihydroxy-4-methylcoumarin manufacturers and suppliers

5,7-Dihydroxy-4-methylcoumarin suppliers

Properties

Melting point:: 296-299 °C (lit.)

Boiling point:: 472.1±14.0 °C(Predicted)

Density: 1.456±0.06 g/cm3(Predicted)

storage temp.: -20°C Freezer, Under inert atmosphere

solubility: DMSO (Slightly), Methanol (Slightly)

form: Solid

pka: 7.29±0.20(Predicted)

color: Off-White to Pale Green

Sensitive: Light Sensitive

λmax: 322nm(MeOH)(lit.)

BRN: 179133

InChIKey: QNVWGEJMXOQQPM-UHFFFAOYSA-N

Safety Information

Symbol(GHS): GHS07

Signal word: Warning

Hazard statements: H302

Precautionary statements: P301+P312+P330

Hazard Codes: Xi

Risk Statements: 36/37/38

Safety Statements: 26-36

WGK Germany: 3

TSCA: Yes

HazardClass: IRRITANT

HS Code: 29321900

Use

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.

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