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2,3-Dichloro-5,6-dicyano-1,4-benzoquinone as a redox titrant

Author:
El-Brash, A. M., El-Hussain, Laila A.
Source:
Archives of pharmacal research 1997 v.20 no.6 pp. 597-601
ISSN:
0253-6269
Subject:
acetic acid, drugs, electrodes, hydrazine, isoniazid, phosphates
Abstract:
An oxidimetric titrant, 2,3-dichloro-5,6-dicyano-1,4-benzoquinone in anhydrous acetic acid is used for the semimicro-determination of hydrazine hydrate, phenylhydrazine hydrochloride, isoniazid and iproniazid phosphate in pure forms as well as in some pharmaceutical preparations containing isoniazid and iproniazid phosphate. The end point was detected potentiometrically using a platinum-calomel combination electrode. The results obtained are compared statistically with those obtained by the official methods and they are in good agreement.
Agid:
4404869