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Bromocresol green (BCG) is a dye of the triphenylmethane family (triarylmethane dyes). It belongs to a class of dyes called sulfonephthaleins. [ 4 ] It is used as a pH indicator in applications such as growth mediums for microorganisms and titrations.
Absorption spectra of bromocresol green at different stages of protonation. An indicator may be used to obtain quite precise measurements of pH by measuring absorbance quantitatively at two or more wavelengths. The principle can be illustrated by taking the indicator to be a simple acid, HA, which dissociates into H + and A −. HA ⇌ H + + A −
The general carbon skeleton of bromothymol blue is common to many indicators including chlorophenol red, thymol blue, and bromocresol green. [ 2 ] The presence of one moderate electron-withdrawing group ( bromine atom) and two moderate donating groups (alkyl substituents) are responsible for bromothymol blue's active indication range from a pH ...
Brilliant green: Malachite green G Zeylonka Basic green 1 42040 triarylmethane 633-03-4: Bromsulfthalein: BSP triarylmethane 71-67-0: Bromocresol green: BCG triarylmethane 76-60-8: Bromocresol purple: BCP triarylmethane 115-40-2: Bromodeoxyuridine: BDU 59-14-3: Bromophenol blue: BPB Albutest triarylmethane 115-39-9: Bromopyrogallol red ...
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bromocresol green, cresol red: Except where noted otherwise, data are given for ... Indo-1, a popular calcium indicator; MCPA, (4-chloro-2-methylphenoxy)acetic acid;
An ear, nose and throat doctor explains why tipping your head back with a nosebleed could make things worse and what you should do instead.
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