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IIT JEE > Learn IIT JEE Coaching > What is methyl orange? How is it made?
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What is methyl orange? How is it made?

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Maths and physics teacher till engineering level

Methyl orange is a pH indicator frequently used in titrations because of its clear and distinct colour change. Because it changes colour at the pH of a midstrength acid, it is usually used in titrations for acids.
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Methyl orange is an intensely colored compound used in dyeing and printing textiles. It is also known as C.I. Acid Orange 52, C.I. 13025, helianthine B, Orange III, Gold orange, and Tropaeolin D . Chemists use methyl orange as an indicator in the titration of weak bases with strong acids.
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Methyl orange is synthesized by diazotization. Methyl orange is synthesized by reaction of sulfanilic acid, sodium nitrite, and dimethylaniline. First, sulfanilic acid is dissolved in dilute aqueous acid. Sodium nitrite is added to produce a diazonium salt .The diazonium salt is then coupled with dimethylaniline....
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Methyl orange is synthesized by diazotization. Methyl orange is synthesized by reaction of sulfanilic acid, sodium nitrite, and dimethylaniline. First, sulfanilic acid is dissolved in dilute aqueous acid. Sodium nitrite is added to produce a diazonium salt .The diazonium salt is then coupled with dimethylaniline. The coupling takes place in the opposite ("para") position from the -N(CH3)2 group: The sodium acetate makes the solution weakly basic; the acetate ion accepts the hydrogen displaced from the dimethylaniline ring. read less
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