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Thermo Scientific Chemicals Cresol Red

Product Code. 11483467
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Product Code. 11483467 Supplier Thermo Scientific Chemicals Supplier No. A17243.14
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Description

CAS: 1733-12-6 | C21H18O5S | 382.43 g/mol

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.

Applications
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.

Solubility
Soluble in water (slightly at 20°C), 50% ethanol (0.1%), dil. acids, and dil. alkalis. Insoluble in benzene.

Notes
Transition interval (acid): pH 1.8 (orange) to pH 2.0 (yellow); (alkaline) pH 7.0 (yellow) to pH 8.8 (violet)
TRUSTED_SUSTAINABILITY

Chemical Identifiers

CAS 1733-12-6
Molecular Formula C21H18O5S
Molecular Weight (g/mol) 382.43
MDL Number MFCD00005878
InChI Key OBRMNDMBJQTZHV-UHFFFAOYSA-N
Synonym o-Cresolsulfonephthalein
PubChem CID 73013
ChEBI CHEBI:86218
IUPAC Name 4-[3-(4-hydroxy-3-methylphenyl)-1,1-dioxo-2,1$l^{6}-benzoxathiol-3-yl]-2-methylphenol
SMILES CC1=CC(=CC=C1O)C1(OS(=O)(=O)C2=CC=CC=C12)C1=CC=C(O)C(C)=C1

Specifications

Melting Point >300°C
Beilstein 343399
Merck Index 14,2578
Solubility Information Soluble in water (slightly at 20°C),50% ethanol (0.1%),dil. acids,and dil. alkalis. Insoluble in benzene.
Formula Weight 382.44
Quantity 25 g
Chemical Name or Material Cresol Red

RUO – Research Use Only

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