| alkannin | (-)-5,8-dihydroxy-2-(1-hydroxy-4-methyl-3-pentenyl)-1,4-naphthoquinone;the major red dye derived from alkanet; used as an astringent, and in cosmetics and foods; can be used as an indicator: red at pH 6.8, changing to purple at pH 8.8 and blue at pH 10.0; also used as a fat stain. Synonym: anchusin. (05 Mar 2000) |
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| alkannin paper |
filter paper dipped in an alcoholic solution of alkannin; alkalis turn it blue, acids red.
Ãâó: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| alkannin |
a red powder, the coloring ingredient of alkanet; used as a colorant and, in the form of alkannin paper as an indicator: alkalis turn the paper blue, acids red.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| alkannin p. |
filter paper dipped in an alcoholic solution of alkannin; alkalis turn it blue, acids red.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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