Cresol Red

CAS: 1733-12-6

Ref. 02-A17243

Product Information

• Name: Cresol Red
• Synonyms: o-Cresolsulfonephthalein, 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-Cresolsulfonphthalein, o-Cresolsulphonephthalein, o-Toluenesulfonic acid, α-hydroxy-α,α-bis(4-hydroxy-m-tolyl)-, γ-sultone

Description

Cresol red is commonly used with lead acetate for the detection of urease after PAGE. It is also used as an indicator with the following transition intervals: pH 1.8 (orange) to pH 2.0 (yellow); pH 7.0 (yellow) to pH 8.8 (violet). Cresol Red is used as a tracking dye in DNA, RNA (agarose) and protein (polyacrylamide) electrophoresis. In agarose, Cresol Red runs with an apparent molecular size of approx. 125 bp DNA. Cresol Red does not inhibit Taq polymerase. This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

• Brand: Alfa Aesar By Thermo Fisher Scientific

Chemical properties

• Molecular weight: 382.43
• Formula: C₂₁H₁₈O₅S
• Color/Form: Dark green or red-brown or dark brown, Powder
• InChI key: OBRMNDMBJQTZHV-UHFFFAOYSA-N