Cresol Red (0.04% in Water) [for pH Determination] TCI C0407

Chemical Identity

CAS No.: 62625-29-0
PubChem: CID 23692294·SID 87565534
Formula: C21H18O5S
Molecular weight: 382.43 g/mol

Full identifiers (IUPAC, SMILES, InChIKey)

IUPAC: sodium 4-[3-(4-hydroxy-3-methylphenyl)-1,1-dioxo-2,1lambda6-benzoxathiol-3-yl]-2-methylphenolate
SMILES: CC1=C(C=CC(=C1)C2(C3=CC=CC=C3S(=O)(=O)O2)C4=CC(=C(C=C4)[O-])C)O.[Na+]
InChIKey: FMKJVYROEYMYFV-UHFFFAOYSA-M
MDL: MDL00001618

Rp 717.150,00

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Volume 500mL

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TCI Cresol Red (0.04% in Water) (C0407) is a ready-to-use aqueous indicator solution formulated for pH determination. Because the concentration is fixed and consistent, it removes the weighing and dissolution steps and improves reproducibility between tests and operators. A few drops added to a sample are enough to observe the characteristic colour transition, making it convenient for routine titrations, teaching laboratories, and quick quality checks. Supplied in a 500 mL bottle, the solution should be stored cool, tightly closed, and protected from direct light.

TCI brochures (PDF)

Titration Reagents and TLC Stains 2026-05-07 · p. 3

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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
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
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

References were compiled automatically from Crossref and every DOI was verified to exist. AMI Scientific is not affiliated with the authors or the publishers.