Pyrazolone dye | Article about pyrazolone dye by The Free Dictionary
pyrazolone dye[pə′raz·ə‚lōn ‚dī]
An acid dye containing both ‒N=N‒ and =C=C= chromophore groups, such as tartrazine; used for silk and wool.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Considerable decrease of photocatalytic decolorization rate was observed when two or three chloro substituents were present on the phenyl ring of a pyrazolone dye