methyl orange

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Related to methyl orange: phenolphthalein, Methyl red


1. the trees Citrus aurantium and Citrus sinensis or their fruits; the flowers and peels are used in pharmaceutical preparations.
2. a color between red and yellow, produced by energy of wavelengths between 590 and 630 nm..
3. a dye or stain with this color.
methyl orange an orange-yellow aniline dye, used as an indicator with a pH range of 3.2–4.4 and a color change from pink to yellow.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

meth·yl or·ange

(meth'il ōr'enj),
A weakly acid dye used as a pH indicator (red at 3.2, yellow at 4.4).
Synonym(s): helianthine
Farlex Partner Medical Dictionary © Farlex 2012

methyl orange

A dye used as a pH indicator.
CAS # 547-58-0
See also: methyl
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
Time-dependent adsorption studies show that C1 is a good candidate for the adsorption of chlorophenols, methyl orange, and Eriochrome Black T.
In the equation, [C.sub.0] is the initial concentration of methyl orange solution, C is the concentration after adsorption, V is the volume of solution, m is the weight of microspheres (g), and Q is mass of adsorbed methyl orange per gram of microsphere.
Before the beginning of photolysis, methyl orange solution was accurately measured and add to five 50 mL quartz tubes.
After decolorization of the three mentioned dyes (malachite green, Congo red and methyl orange) by fungal isolate, they were tested for their toxicity against both of Caco-2 and fibroblast cells compared with dyes containing water with final concentrations of 5, 10, 15, 20 and 25 mg/L.
The concentration change was calculated from the linear calibration plot of the non-hydrogenated methyl orange at a wavelength of 465 nm.
A given amount of catalysts and 50 mL of methyl orange solution were placed in a 100 mL glass beaker thermostated using a water jacket.
Caption: Figure 9: Photodegradation of 10 ppm methyl orange solution using Ag/C codoped Ti[O.sub.2] photocatalysts with different contents of Ag under visible light irradiation at 25[degrees]C and pH 7.
Meanwhile, it was found that in degradation of methyl orange or 4-4-[(dimethylamone)phenylazo] benzenesulfonic acid, a Ti[O.sub.2] film was up to 50% less effective than the Ti[O.sub.2] slurry.
Degradation of Methyl Orange. Eight test solutions of 20 mg/L methyl orange were prepared by dissolving methyl orange granules in deionized distilled water.
Benzophenone (BP), 2-hydroxyethyl methacrylate (HEMA), methyl orange (MeOr), Zn[(N[O.sub.3]).sub.2], and oxalic acid were used as purchased from Lingfeng Shanghai Reagent Co.
Methyl orange, an anionic dye has been used as a probe to study the mode and the extent of complex formation between small molecules, proteins and water-soluble polymers [9].