TCI Cresol Red (C0406) is a sulfonephthalein acid–base indicator long established in titrimetric analysis. It is valued for having two distinct colour transition ranges, one in strongly acidic conditions and another spanning the weakly alkaline region, which makes it adaptable to a variety of titrations. Supplied as a powder, it lets laboratories prepare indicator solutions at whatever concentration their protocols require. Available in 1 g and 25 g packs, it should be kept cool, dry, tightly closed, and protected from light.
TCI brochures (PDF)
- Titration Reagents and TLC Stains 2026-05-07 · p. 3
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- Zou et al. (2013). Sonodynamic and sonocatalytic damage of BSA molecules by Cresol Red, Cresol Red-DA and Cresol Red-DA-Fe under ultrasonic irradiation. Ultrasonics Sonochemistry doi:10.1016/j.ultsonch.2012.10.008
- Kiciak (1990). Spectrophotometric determination of small amounts of Xylenol Orange, Semi-Xylenol Orange and o-Cresol Red. Talanta doi:10.1016/0039-9140(90)80193-j
- Patsavas et al. (2013). Purification of meta-cresol purple and cresol red by flash chromatography: Procedures for ensuring accurate spectrophotometric seawater pH measurements. Marine Chemistry doi:10.1016/j.marchem.2013.01.004
References were compiled automatically from Crossref and every DOI was verified to exist. AMI Scientific is not affiliated with the authors or the publishers.

