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114529

Sigma-Aldrich

Phenol Red

ACS reagent

Synonyme(s) :

Phenolsulfonphthalein

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About This Item

Formule empirique (notation de Hill):
C19H14O5S
Numéro CAS:
143-74-8
Poids moléculaire :
354.38
Numéro Beilstein :
326470
Numéro CE :
205-609-7
Numéro MDL:
MFCD00003552
Code UNSPSC :
12171500
ID de substance PubChem :
24847179
Nomenclature NACRES :
NA.47

Qualité

ACS reagent

Niveau de qualité

200

Forme

powder

Limpidité de la solution

passes test

Technique(s)

titration: suitable

visual transition interval

6.8-8.2, yellow to red

Solubilité

water: 0.77 g/L at 100 °C

λmax

360 nm
557 nm (2nd)

ε (coefficient d'extinction)

≥10000 at 288-294 nm in H2O
≥55000 at 555-561 nm in H2O
≥7000 at 357-363 nm in H2O

Application(s)

diagnostic assay manufacturing
hematology
histology

Température de stockage

room temp

Chaîne SMILES 

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

Clé InChI

BELBBZDIHDAJOR-UHFFFAOYSA-N

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Description générale

Phenol Red is a phenolsulfonphthalein compound. It is present as a sulfonated hydroxyquinone in weakly acidic aqueous solutions. In alkaline solutions, the dye forms a hydrophilic dianion (a small, red anion that has a larger conjugated system than the yellow hydroxyquinone).

Application

Phenol red is commonly used as a pH indicator in biology and medicine. It is incorporated into microbiological culture media for the identification of Escherichia coli strains. Its clinical diagnostic applications include the investigation of gastric and duodenal ulcers and the assessment of tear function in ophthalmology. Phenol red is also used as a tracer to assess the permeability of the ileal mucosal membrane and to assess bacterial leakage through root-filling materials in dentistry.
Phenol Red has been used for the preparation of phenol red gavage meal for measurement of gastric emptying in rats.
Suitable for use as a pH indicator.

Actions biochimiques/physiologiques

Phenol Red is a pH indicator which changes color from yellow to red.

Pictogrammes

Exclamation mark
GHS07

Mention d'avertissement

Warning

Mentions de danger

H315,H335

Classification des risques

Skin Irrit. 2 - STOT SE 3

Organes cibles

Respiratory system

Code de la classe de stockage

11 - Combustible Solids

Classe de danger pour l'eau (WGK)

WGK 3

Point d'éclair (°F)

Not applicable

Point d'éclair (°C)

Not applicable

Équipement de protection individuelle

dust mask type N95 (US), Eyeshields, Gloves

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Certificats d'analyse (COA)

Lot/Batch Number
0000389289
0000389290
0000372792
0000372791
0000356118

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