Lapachol: a new acid-base indicator.
Lapachol, a new one-colour acid-base indicator, is easily available from natural sources and gives a deep red colour with aqueous alkalies. Its transition range is found to be pH 4.8-5.8. It can be used for titration of strong acids with strong or weak bases.
Joshi
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Chemistry Department, University of Rajasthan, Jaipur-302004, India.
Singh
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Singh
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