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Definition of Methyl orange
1. Noun. An azo dye used as an acid-base indicator; used for titrations involving weak bases.
Definition of Methyl orange
1. Noun. (chemistry) An azo dye used as an acid-base indicator for titrations involving a weak base ¹
¹ Source: wiktionary.com
Medical Definition of Methyl orange
1. C14H14N3O3SNa;a weakly acid dye used as a pH indicator (red at 3.2, yellow at 4.4). Synonym: helianthine. (05 Mar 2000)