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2005
Other natural products
U 0800
Isolation of the Natural Colorant from the Roots of Arnebia nobilis and Its Use as
New Neutralization Indicator. — Compound (I) is reported to have a much wider
16- 191 apH-range
than phenolphthalein or methyl orange, and it is also working in mixtures of
strong acid-weak alkali and weak acid-strong alkali, where the two common indicators
fail. — (INDRAYAN*, A. K.; YADAV, V.; KUMAR, R.; TYAGI, P. K.; J. Indian
Chem. Soc. 81 (2004) 8, 717-720; Dep. Chem., Gurukula Kangri Univ.,
Hardwar 249 404, India; Eng.) — C. Oppel
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