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Merck
CN

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:
326470
EC Number:
MDL number:
UNSPSC Code:
12171500
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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.

Regulatory Information

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Dongdong Wang et al.
Journal of ethnopharmacology, 139(1), 189-193 (2011-11-22)
Bulbus Fritillaria Cirrhosae (BFC), known by the Chinese name "Chuan-Bei-Mu", is used as an antitussive, antiasthmatic and expectorant drug for more than 2000 years in China, and Bulbus of Fritillaria wabuensis S. Y. Tang & S. C. Yueh (BFW) was
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Revista espanola de enfermedades digestivas : organo oficial de la Sociedad Espanola de Patologia Digestiva, 104(1), 1-3 (2012-02-04)
Hirotaka Miyamoto et al.
The Journal of pharmacy and pharmacology, 64(6), 848-854 (2012-05-11)
The aim of this study was to determine the factor changing the hepatic disposition of a drug during hypothermia using a rat liver perfusion system. The livers of male Wistar rats were perfused at 37, 32 or 28°C in the
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
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

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