methyl orange

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Related to Methylorange: 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