Dictionary

methyl orange

noun

Definition of METHYL ORANGE

:  an alkaline dye used as a chemical indicator

First Known Use of METHYL ORANGE

1881
Medical Dictionary

methyl orange

noun

Medical Definition of METHYL ORANGE

:  a basic azo dye C14H14N3NaO3S that is used chiefly as an acid-base indicator and whose dilute solution is yellow when neutral and pink when acid

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