1,2,4-Benzenetriol NEW

Hydroxyquinol is a benzenetriol.

Appearance and properties: dark blue powder

Density: 1.488

Boiling point: 132.9ºC at 760 mmHg

Melting point: 140 °C (subl.)(lit.)

Flash point: 34.2ºC

Refractive index: 1.5445 (20ºC)

Water solubility: freely soluble

Stability: Stable under normal temperatures and pressures. May discolor on exposure to air. Light sensitive.

Storage conditions: ventilated and dry at low temperature, and stored separately from the food raw materials in the warehouse

Production method

1,2, 4-phloroglucinol triacetate was prepared from p-benzoquinone and acetic anhydride, and then acted with hydrochloricacid to obtain the product. 1.1, Preparation of 2, 4-phenyltriacetate The dried p-benzoquinone was added to the mixture ofacetic anhydride and concentrated sulfuric acid in fractions at a reaction temperature of 40-50℃ for 1-3h. Add cold water tothe reactants, filter the precipitates, wash in cold water, recrystallize with alcohol, to obtain 1,2, 4-phenyltritriacetate. Melting

point 96.5-97℃. 2.1, Preparation of 2, 4-phenylgallol 5% hydrochloric acid was stirred with 1,2, 4-phenylgallol triacetate,heated to 90℃, hydrolyzed for 20min, and cooled. Neutralize with sodium carbonate and strain. The filtrate is extracted withether, and the ether extract is heated and steamed to obtain 1,2, 4-phenyltriester.

Use

Intermediate for organic synthesis, absorbent for gas analysis.