Cresol Red
chemical compound
Cresol red (full name: o-cresolsulfonephthalein) is a triarylmethane dye frequently used for monitoring the pH in aquaria.
Molecular biology
Cresol red can be used in many common molecular biology reactions in place of other loading dyes. Cresol Red does not inhibit Taq polymerase to the same degree as other common loading dyes.
Colour marker
Cresol red can also be used as an electrophoretic colour marker to monitor the process of agarose gel electrophoresis and polyacrylamide gel electrophoresis. In a 1% agarose gel, it runs approximately at the size of a 125 base pair (bp) DNA molecule (it depends on the concentration of buffer and other component). Bromophenol blue and xylene cyanol can also be used for this purpose.
“Cresol Red” enters the record as chemical compound. Crown Archives preserves that source wording while asking what Cresol, chemical and compound can confirm, complicate or overturn.
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Datasets, specimens, observations and peer-reviewed methods provide the appropriate test for the technical claims summarized here. The source revision retrieved here is dated Jun 7, 2026. The linked authority identifier is Q417497. None of the 0 selected statements returned an explicit reference.
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