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4-Hydroxybenzoic acid, also known as p-hydroxybenzoic acid (PHBA), is a monohydroxybenzoic acid, a phenolic derivative of benzoic acid.It is a white crystalline solid that is slightly soluble in water and chloroform but more soluble in polar organic solvents such as alcohols and acetone. 4-Hydroxybenzoic acid is primarily known as the basis for the preparation of its esters, known as parabens ...
Boiling point (°C) K b (°C⋅kg/mol) Freezing point (°C) ... Formic acid: 101.0 2.4 8.0 –2.77 K b & K f [1] Naphthalene: 217.9 78.2 –6.80 Nitrobenzene: 210.8
Melting point: 68 to 69 °C (154 to 156 °F; 341 to 342 K) ... Butylparaben is prepared by the esterification of 4-hydroxybenzoic acid with 1-butanol in the presence ...
Melting point: 158.6 °C (317.5 °F; 431.8 K) Boiling point: 211 °C (412 °F; 484 K) ... 4-Hydroxybenzoic acid, Magnesium salicylate, Choline salicylate,
Benzoic acid and its salts are used as food preservatives, represented by the E numbers E210, E211, E212, and E213. Benzoic acid inhibits the growth of mold, yeast [23] and some bacteria. It is either added directly or created from reactions with its sodium, potassium, or calcium salt. The mechanism starts with the absorption of benzoic acid ...
2,4-Dihydroxybenzoic acid (β-resorcylic acid) is a dihydroxybenzoic acid. As a resorcylic acid, it is one of the three isomeric crystalline acids that are both carboxyl derivatives of resorcinol and dihydroxy derivatives of benzoic acid. [4] Synthesis from resorcinol is via the Kolbe-Schmitt reaction. [5]
Hydroxybenzoic acid may refer to several related chemical compounds: 2-Hydroxybenzoic acid (salicylic acid, o-hydroxybenzoic acid) 3-Hydroxybenzoic acid (m ...
Melting point: 149 °C (300 °F; 422 K) Boiling point: 567 °C (1,053 °F; 840 K) ... geranyl diphosphate and 4-hydroxybenzoic acid to produce 3-geranyl-4 ...