How to get Diphenolic acid?

Diphenolic acid
Synonyms: 4,4-Bis(4-hydroxyphenyl)pentanoic acid; 4,4'-Bis(4-hydroxyphenyl)valeric acid; CTFA
CAS Registry Number: 126-00-1
Formula: C17H18O4
Molecular Weight: 286.32
Diphenolic acerbic is a carboxylic acerbic with atomic blueprint C17H18O4. Its IUPAC name is 4,4-bis(p-hydroxyphenyl)pentanoic acid, and it can be able by the abstract acknowledgment of phenol with levulinic acerbic in the attendance of hydrochloric acid.
Diphenolic acid is a solid at room temperature, melting at 168–171 °C and boiling at 507 °C. According to its MSDS, diphenolic acid is soluble in ethanol, isopropanol, acetone, acetic acid, and methyl ethyl ketone, but insoluble in benzene, carbon tetrachloride, and xylene.
Diphenolic acid may be a suitable replacement for bisphenol A as a plasticizer.
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What is Diphenolic acid?

Diphenolic acid is a carboxylic acid with molecular formula C17H18O4. Its IUPAC name is 4,4-bis(p-hydroxyphenyl)pentanoic acid, and it can be prepared by the condensation reaction of phenol with levulinic acid in the presence of hydrochloric acid. The equation for this synthesis is: 2 C6H5OH + CH3C(O)CH2CH2COOH → CH3C(p-C6H4OH)2CH2CH2COOH + H2O
Diphenolic acid is a solid at room temperature, melting at 168–171 °C and boiling at 507 °C. According to its MSDS, diphenolic acid is soluble in ethanol, isopropanol, acetone, acetic acid, and methyl ethyl ketone, but insoluble in benzene, carbon tetrachloride, and xylene.
Diphenolic acid may be a suitable replacement for bisphenol A as a plasticizer
Application 
Used to prepare various kinds of synthetic resins, electrophoretic coatings, glossy printing inks and coatings etc. 
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Read more: Pyridine synthesis

Specification of Diphenolic acid

Diphenolic acid
Synonyms: 4,4-Bis(4-hydroxyphenyl)pentanoic acid; 4,4'-Bis(4-hydroxyphenyl)valeric acid; CTFA
CAS No.: 126-00-1
Formula: C17H18O4
Molecular Weight: 286.32
Appearance White powder
Purity (%) 98 min. 
Application 
Used to prepare various kinds of synthetic resins, electrophoretic coatings, glossy printing inks and coatings etc. 
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Read more: Pyridine synthesis