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I’ve gotten a range of colors from orange to almost red for P test of fumarprotocetraric acid. Seems to depend on concentration of the acid… and maybe concentration of the reagent in your case? The important ones to distinguish are the pure yellow reactions from thamnolic and psoromic acids. The rest are all just sort of ambiguous orangish-reddish.
I tested it with P prepared with 91% Isopropyl Alcohol (instead of the stuff usually used for this, since I lack denaturated alcohol). My results were slightly orangish. No results observed with K, KC, or C.
It grows on dolomitic limestone of Niagara Escarpment
Created: 2012-07-11 20:13:27 CDT (-0400)
Last modified: 2012-07-11 20:15:38 CDT (-0400)
Viewed: 39 times, last viewed: 2016-10-22 12:52:47 CDT (-0400)