methyl red

methyl red
Usage: sometimes capitalized M&R
: a basic azo dye (CH3)2NC6H4N . C6H4COOH used similarly to methyl orange as an acid-base indicator

* * *

a water-insoluble solid occurring as a dark-red powder or violet crystals, C15H15N3O2, used chiefly as an acid-base indicator. Cf. methyl orange.

Useful english dictionary. 2012.

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  • Methyl red — Identifiers CAS number …   Wikipedia

  • methyl red — A weakly acid dye used as a pH indicator (red at 4.8, yellow at 6.0); easily reduced with loss of color, and pH readings must be made rapidly. * * * methyl red n a basic azo dye C15H15N3O2 used similarly to methyl orange as an acid base indicator …   Medical dictionary

  • methyl red — metilraudonasis statusas T sritis chemija apibrėžtis indikatorius formulė (CH₃)₂NC₆H₄N=NC₆H₄COOH atitikmenys: angl. methyl red rus. метиловый красный ryšiai: sinonimas – 2 (4 dimetilaminofenilazo)benzenkarboksirūgštis …   Chemijos terminų aiškinamasis žodynas

  • methyl red test — (for differentiation of Enterobacteriaceae) the organism is inoculated into a buffered glucose peptone broth containing methyl red. In a positive reaction, the medium remains red after incubation owing to acid metabolic products. Most… …   Medical dictionary

  • methyl red — Chem. a water insoluble solid occurring as a dark red powder or violet crystals, C15H15N3O2, used chiefly as an acid base indicator. Cf. methyl orange. [1905 10] * * * …   Universalium

  • Methyl orange — Methyl orange …   Wikipedia

  • Methyl yellow — IUPAC name p Dimethylaminoazobenzene …   Wikipedia

  • methyl orange — Chem. an orange yellow, slightly water soluble powder, C14H14N3NaO3S, used chiefly as an acid base indicator. Also called gold orange, helianthine B, orange III, tropaeolin D, tropeolin D. Cf. methyl red. [1880 85] * * * …   Universalium

  • methyl red–Voges-Proskauer broth — a broth culture medium containing peptone, glucose, and phosphate, used for the culture of coliform bacteria and differentiation by the methyl red and Voges Proskauer tests. Called also MR VP b …   Medical dictionary

  • methyl orange — noun an azo dye used as an acid base indicator; used for titrations involving weak bases • Hypernyms: ↑azo dye, ↑acid base indicator * * * noun Usage: sometimes capitalized M&O : a basic azo dye (CH3)2NC6H4N . NC6H4SO3Na which is made by coupling …   Useful english dictionary

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