Definition of methyl red in English:

methyl red

noun

Chemistry

A dark red, weakly acidic, water-insoluble dye that is the azo compound of dimethylaniline and anthranilic acid and is used (in alcoholic solution) as an acid–base indicator, changing from red to yellow over a pH range of 4.2 to 6.3; (CH₃)₂NC₆H₄N=NC₆H₄COOH.

Early 20th century; earliest use found in Journal of the Chemical Society. From methyl + red, after German Methylrot.

noun

Chemistry

A dark red, weakly acidic, water-insoluble dye that is the azo compound of dimethylaniline and anthranilic acid and is used (in alcoholic solution) as an acid–base indicator, changing from red to yellow over a pH range of 4.2 to 6.3; (CH₃)₂NC₆H₄N=NC₆H₄COOH.

Early 20th century; earliest use found in Journal of the Chemical Society. From methyl + red, after German Methylrot.

词汇	methyl red
释义	Definition of methyl red in English: methyl red noun Chemistry A dark red, weakly acidic, water-insoluble dye that is the azo compound of dimethylaniline and anthranilic acid and is used (in alcoholic solution) as an acid–base indicator, changing from red to yellow over a pH range of 4.2 to 6.3; (CH₃)₂NC₆H₄N=NC₆H₄COOH. Origin Early 20th century; earliest use found in Journal of the Chemical Society. From methyl + red, after German Methylrot. Definition of methyl red in US English: methyl red noun Chemistry A dark red, weakly acidic, water-insoluble dye that is the azo compound of dimethylaniline and anthranilic acid and is used (in alcoholic solution) as an acid–base indicator, changing from red to yellow over a pH range of 4.2 to 6.3; (CH₃)₂NC₆H₄N=NC₆H₄COOH. Origin Early 20th century; earliest use found in Journal of the Chemical Society. From methyl + red, after German Methylrot.
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