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Cresol Red

Cresol Red
CAS number 1733-12-6
SMILES Cc1cc(ccc1O)/C(=C/2C=CC(=O)C(=C2)C)c3ccccc3OS(O)=O
Molecular formula C21H17NaO5S
Molar mass 404.41 g/mol
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)

Infobox disclaimer and references
Cresol Red (pH indicator)
below pH 7.2 above pH 8.8
7.2 8.8

Cresol Red (full name: o-Cresolsulfonephthalein) is a triarylmethane dye frequently used for monitoring the pH in aquaria.

Cresol Red can be used in many molecular reactions instead of water. For example restriction digestion or PCR.

Cresol Red can also be used as a color 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.


    This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Cresol_Red". A list of authors is available in Wikipedia.
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