Phenylglyoxylic Acid

**Semantic type:** Indicator, Reagent, or Diagnostic Aid|Organic Chemical

**Definition:** An aromatic hydrocarbon comprised of glyoxylic acid where the aldehyde hydrogen is substituted by a phenyl group. Since phenylglyoxylic acid (PGA) is a metabolite of styrenes, the measurement of PGA in urine may be correlated to a subject's level of styrene exposure.

**Synonyms:** - 2-Oxo-2-Phenylacetic Acid - 2-Phenylethanoic Acid - Benzeneacetic Acid, Alpha-Oxo- (9CI) - Benzeneglyoxylic Acid - Benzoylformic Acid - Formic Acid, Benzoyl- - Glyoxylic Acid, Phenyl- - Glyoxylic Acid, Phenyl- (8CI) - Oxophenylacetic Acid - PGA - PHENYLGLYOXYLIC ACID - Phenylgloxylic Acid - Phenylglyoxalate - Phenyloxoacetic Acid - alpha-Ketophenylacetic Acid - alpha-Oxobenzeneacetic Acid