methyl orange

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Related to Methylorange: phenolphthalein, Methyl red

meth′yl or′ange

an orange-yellow, slightly water-soluble powder, C14H14N3NaO3S, used chiefly as an acid-base indicator.
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Noun1.methyl orange - an azo dye used as an acid-base indicator; used for titrations involving weak bases
acid-base indicator - an indicator that changes color on going from acidic to basic solutions
azo dye - any dye containing one or more azo groups
References in periodicals archive ?
The reaction parameters were varied in the degradation of methylorange (MO) for attaining best conditions for photocatalysis.
Thus, the maximum decolorization rate of methylorange solution reaches 90% after degradation for 180 min in a suitable film thickness of 400 nm or so, while the maximum decolorization rate of pure ZnO films is only 48% (curve labeled as "d" in Figure 3).
The photocatalytic activities of the samples were evaluated by the degradation of methylorange (MO) in a cylindrical quartz vessel in response to visible light at room temperature.