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Key Documents

P4633

Sigma-Aldrich

Phenol Red

pH indicator

Synonym(s):

Phenolsulfonphthalein

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About This Item

Empirical Formula (Hill Notation):
C19H14O5S
CAS Number:
Molecular Weight:
354.38
Beilstein/REAXYS Number:
326470
EC Number:
MDL number:
UNSPSC Code:
12171500

technique(s)

titration: suitable

visual transition interval

6.8-8.2, yellow to red

SMILES string

Oc1ccc(cc1)C2(OS(=O)(=O)c3ccccc23)c4ccc(O)cc4

InChI

1S/C19H14O5S/c20-15-9-5-13(6-10-15)19(14-7-11-16(21)12-8-14)17-3-1-2-4-18(17)25(22,23)24-19/h1-12,20-21H

InChI key

BELBBZDIHDAJOR-UHFFFAOYSA-N

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Application

Suitable for use as a pH indicator.

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Certificates of Analysis (COA)

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Zhen-Yu Li et al.
Journal of ethnopharmacology, 140(1), 83-90 (2012-01-03)
Flower bud of Tussilago farfara L. is widely used for the treatment of cough, bronchitis and asthmatic disorders in the Traditional Chinese Medicine. However, due to the increasing demands, adulteration with rachis is frequently encountered in the marketplace. No report
Parviz Lalezari et al.
Analytical biochemistry, 416(1), 92-99 (2011-05-25)
A new method for extraction and concentration of organic dyes that uses a reagent composed of a nonionic detergent mixed with an alcohol is described. We have observed that water-soluble organic dyes are also soluble in nonionic detergents and can
Héctor Rubén Hernández-Garcés et al.
Revista espanola de enfermedades digestivas : organo oficial de la Sociedad Espanola de Patologia Digestiva, 104(1), 4-9 (2012-02-04)
An analytic study to validate a diagnostic test was carried out at the Institute of Gastroenterology in Havana, Cuba in adult patients of both sexes in whom chromoendoscopy was carried out with red phenol at 0.1% over the gastric mucosa
Pankaj Dixit et al.
Journal of pharmacological and toxicological methods, 65(1), 13-17 (2011-11-24)
Everted gut sac of rat intestine is a paradigm widely employed for determination of absorption kinetics of drugs along with evaluation of effects of absorption enhancers. Since its inception in 1954, it has been optimized to enhance tissue survival and
Souvika Bakshi et al.
Plant cell reports, 31(6), 1093-1103 (2012-02-14)
A new method for obtaining transgenic cowpea was developed using positive selection based on the Escherichia coli 6-phosphomannose isomerase gene as the selectable marker and mannose as the selective agent. Only transformed cells were capable of utilizing mannose as a

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