
1) Triarylmethane dye
Found on
https://www.crosswordclues.com/clue/cresol-red

Cresol Red (full name: o-Cresolsulfonephthalein) is a triarylmethane dye frequently used for monitoring the pH in aquaria. ==pH indicator== ==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 dye...
Found on
http://en.wikipedia.org/wiki/Cresol_Red

<chemical> A reddish-brown powder which can be dissolved in water or alcohol that has the chemical formula of C21H18O5S. The dissolved compound has different colours depending on the pH, when the pH is 7.2 it is yellow, when the pH is 8.8 it is red, and when the pH is 2-3 it is orangish. As a result, it is used as an acid-base indicator. It i...
Found on
http://www.encyclo.co.uk/local/20973

Type: Term Pronunciation: krē′sol red Definitions: 1. An acid-base indicator with a pK value of 8.3; yellow at pH values below 7.4, red above 9.
Found on
http://www.medilexicon.com/medicaldictionary.php?t=21207
No exact match found.