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MANDELIC ACID (Phenylglycollic Acid),...

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Originally appearing in Volume V17, Page 559 of the 1911 Encyclopedia Britannica.
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MANDELIC ACID (Phenylglycollic Acid), C8H803 C6H5•CH(OH)•000H, an isomer of the cresotinic and oxymethylbenzoic acids. Since the molecule contains asymmetric carbon atom, the acid exists in three forms, one being an inactive " racemic " mixture, and the other two being optically active forms. The inactive variety is known as paramandelic acid. It may be prepared by the action of hydrochloric acid on the addition compound of benzaldehyde and hydrocyanic acid: C5H5CHO+HCN+HC1+2H2O= C5H5•CHOH•COOH+NH4CI, (F. L. Winckler, Ann., 1836, 18, 310), by boiling phenylchloracetic acid with alkalis (A. Spiegel, Ber., 1881, 14, 239), by heating benzoylformaldehyde with alkalis (H. v. Pechmann, Ber., 1887, 20, 2905), and by the action of dilute alkalies on w-dibromacetophenone (C. Engler, Ber., 1887, 20, 2202):
End of Article: MANDELIC ACID (Phenylglycollic Acid), C8H803
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