4-Hydroxyphenylacetic acid is an organic compound with the formula . It is a colorless or white solid but commercial samples can appear beige. It is found in olive oil and beer.Determination of free and bound phenolic acids in beer. M. Nardini and A. Ghiselli, Food Chemistry, January 2004, Volume 84, Issue 1, Pages 137–143,

Synthesis 4-Hydroxyphenylacetic acid is obtained by reducing 4-hydroxymandelic acid with elemental phosphorus and iodine.

Uses In industry, 4-hydroxyphenylacetic acid is an intermediate to atenolol, 3,4-dihydroxyphenylacetic acid, and coclaurine.

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