3312. Diphenolic Acid

Nomenclature

CAS number: 126-00-1
4-Hydroxy-γ-(4-hydroxyphenyl)-γ-methylbenzenebutanoic acid; 4,4-bis[4′-hydroxyphenyl]pentanoic acid; γ,γ-bis-(p-hydroxyphenyl)valeric acid; DPA.
C17H18O4; mol wt 286.32.
C 71.31%, H 6.34%, O 22.35%.

Description and references

Prepd by condensing 2.25-4.0 moles of phenol with one mole of levulinic acid in the presence of HCl: GB 768206 (1957 to S. C. Johnson & Son); from one mole of phenol, 0.5 mole levulinic acid and HCl, H2SO4 or H3PO4: Bader, Kantowicz, J. Am. Chem. Soc. 76, 4465 (1954); Bader, US 2933520 (1960 to S. C. Johnson & Son).

Chemical structure

Properties

Crystals from hot water. Higher melting modification, mp 171-172°. Appreciably sol in hot water; sol in acetone, acetic acid, ethanol, isopropanol, methyl ethyl ketone.

Use

Intermediate for surface coatings, lubricating oil additives, cosmetics, surfactants, plasticizers, textile chemicals.