Cresol red

CAS: 1733-12-6

Ref. 3D-FC05848

Product Information

• Name: Cresol red
• Synonyms: o-Cresolsulfonphthalein, Kresolrot, 2-[(Z)-(4-hydroxy-3-methylphenyl)(3-methyl-4-oxocyclohexa-2,5-dien-1-ylidene)methyl]benzenesulfonic acid, 3H-2,1-Benzoxathiole, phenol deriv., 3′,3′′-Dimethylphenolsulfonephthalein, 4,4'-(1,1-dioxido-3H-2,1-benzoxathiole-3,3-diyl)bis(2-methylphenol), 4,4′-(1,1-Dioxido-3H-2,1-benzoxathiol-3-ylidene)bis[2-methylphenol], Cresol red (0.1% in ca. 20% ethanol), Cresolsulfophthalein, NSC 7224, Phenol, 4,4′-(1,1-dioxido-3H-2,1-benzoxathiol-3-ylidene)bis[2-methyl-, Phenol, 4,4′-(3H-2,1-benzoxathiol-3-ylidene)bis[2-methyl-, S,S-dioxide, o-Cresol Red, o-Cresol, 4,4′-(3H-2,1-benzoxathiol-3-ylidene)di-, S,S-dioxide, o-Cresolsulfonephthalein, o-Cresolsulphonephthalein, o-Toluenesulfonic acid, α-hydroxy-α,α-bis(4-hydroxy-m-tolyl)-, γ-sultone

Description

Cresol red is a weak diacidic molecule and an anionic dye largely used in genetic and biochemical studies. Cresol red is commonly used to measure the pH of aqueous solutions also from environmental samples, e.g. seawater (Byrne, 1989). Cresol red shows an increased protonation in acidic water-based solutions at low temperatures (Heger, 2006). Cresol red can be used to introduce pH-sensing features to sensing materials, such as, optical fibres or nanoparticles (Islam, 2021).

• Brand: Biosynth

Chemical properties

• Molecular weight: 382.43 g/mol
• Formula: C₂₁H₁₈O₅S
• Color/Form: Brown Red Powder
• InChI: InChI=1S/C21H18O5S/c1-13-11-15(7-9-18(13)22)21(16-8-10-19(23)14(2)12-16)17-5-3-4-6-20(17)27(24,25)26-21/h3-12,22-23H,1-2H3
• InChI key: InChIKey=OBRMNDMBJQTZHV-UHFFFAOYSA-N
• SMILES: Cc1cc(C2(c3ccc(O)c(C)c3)OS(=O)(=O)c3ccccc32)ccc1O