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P3532

Sigma-Aldrich

Phenol Red

Bioreagent, Powder

Synonym(s):

Phenolsulfonphthalein

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About This Item

Empirical Formula (Hill Notation):
C19H14O5S
CAS Number:
143-74-8
Molecular Weight:
354.38
Beilstein/REAXYS Number:
326470
EC Number:
205-609-7
MDL number:
MFCD00003552
UNSPSC Code:
12171500
PubChem Substance ID:
24898424
NACRES:
NA.47

product name

Phenol Red, powder, BioReagent, suitable for cell culture

product line

BioReagent

Quality Level

200

form

powder

technique(s)

cell culture | mammalian: suitable

color

dark red to dark brown

visual transition interval

6.8-8.2, yellow to red

mp

>300 °C

solubility

1 M NaOH: 1 mg/mL

application(s)

diagnostic assay manufacturing

storage temp.

room temp

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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General description

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 and 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 investigation of gastric and duodenal ulcers and in 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.
Suitable for use as a pH indicator.

pictograms

Exclamation mark
GHS07

signalword

Warning

hcodes

H315,H335

Hazard Classifications

Skin Irrit. 2 - STOT SE 3

target_organs

Respiratory system

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
0000349810
0000349811
SHBR8739
0000349811
0000349810

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Sigma-Aldrich

P5530

Phenol Red sodium salt

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