Dictionary
meth'yl or'ange
Chem.
an orange-yellow, slightly water-soluble powder, C
14H
14N
3NaO
3S, used chiefly as an acid-base indicator. Also called
gold orange, helianthine B, orange III, tropaeolin D, tropeolin D. Cf.
methyl red. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.