methyl orange

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Related to methyl orange: phenolphthalein, Methyl red

meth′yl or′ange

an orange-yellow, slightly water-soluble powder, C14H14N3NaO3S, used chiefly as an acid-base indicator.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
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
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References in periodicals archive ?
Structural decomposition rate of the composite hydrogels and model contaminant (methyl orange) was performed under simulated sun light.
4, 4'-Bipyridine and methyl orange indicator were purchased from Sigma-Aldrich Chemical Co., and they were used without further purification.
Exactly 5 mL of the samples was withdrawn after two hours, filtered, and the absorbance measured with a Shimadzu T70 UV-Vis spectrometer at predetermined wavelengths of maximum absorption ([[lambda].sub.max]) (phenol = 280 nm, 2-chlorophenol = 275 nm, 3-chlorophenol = 300 nm, 4-chlorophenol = 260 nm, methyl orange = 440 nm, and Eriochrome Black T = 200 nm).
Moreover, the nanocomposites showed excellent efficiency for methylene blue (MB), rhodamine B (Rh), and methyl orange (MO) degradation in water under ultrasound for 15 min.
The common indicator solutions include thymol blue, methyl orange, bromthymol blue, phenolphthalein, and bromphenol blue.
Similar results have been reported as per the adsorption of methyl orange using pinecone derived active carbon [35].
The structure and adsorption properties of microsphere for methyl orange were investigated.
Analytic Determination of Methyl Orange. The photocatalytic activity and stability of immobilized PU/Ti[O.sub.2] were evaluated by measuring the photocatalytic degradation efficiency of methyl orange.
The highest percentage of decolorization by laccase was exhibited for malachite green (98% and 96.8%) followed by Congo red (95% and 85%) and methyl orange (87.6% and 83%).
The ability of the membrane was investigated by studying the separation of methyl orange as the pollutant sample from water through physical separation and photocatalytic degradation methods both individually and simultaneously.
We have compared the various concentrations of InVO4 on TiO2 matrix by SEM, BET surface area analyzer, FTIR, XRD, and photodegradation of the organic contaminant Methyl Orange. After characterization we found that 4wt% InVO4+TiO2 mixture displayed the most promising characteristics for photo-oxidation under visible light; From the BET surface area analysis it showed the largest surface area out of the prior mentioned TiO2= Xwt% INVO4 mixtures and a degradation amount equivalent to 50% of Methyl Orange contaminant over 7 hours under visible light.
Figure 7 shows the photocatalytic degradation of methyl orange (MO) on Cd[In.sub.2][S.sub.4] microspheres with otherwise identical conditions under visiblelight irradiation ([lambda] > 400 nm) after the adsorption desorption equilibrium was reached.