Merck Phenol Red sodium salt

Phenol Red sodium salt

form

powder

Quality Level

200

technique(s)

titration: suitable

visual transition interval

6.8-8.2, yellow to red

mp

285 °C (dec.) (lit.)

solubility

water: 1 mg/mL, opaque, dark red

εmax

31.62 at 423 nm in 0.1 M phosphate buffer

application(s)

diagnostic assay manufacturing
hematology
histology

저장 온도

room temp

SMILES string

[Na+].Oc1ccc(cc1)C2(OS(=O)(=O)c3ccccc23)c4ccc([O-])cc4

InChI

1S/C19H14O5S.Na/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;/q;+1/p-1

InChI key

HKHYOKBQJILTEI-UHFFFAOYSA-M

Phenol Red sodium salt is widely used as a pH indicator. At a pH of 6.4 and below, phenol red solution will have a yellow color. At a pH of 8.2 and above, it will have a red color. It is commonly used in culture media to detect neutral to acidic pH changes.