Description
DESCRIPTION
Phenolsulfonphthalein or otherwise called phenol red is a pH indicator commonly used in cell biology laboratories.
Phenol red (PR) is the standard pH indicator in various cell and tissue culture media, as it provides a quick check for the health of the culture. PR has also been used in multiple protocols to detect cellular hydrogen peroxide as well as peroxidase activity from human peroxidase enzymes.
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.
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.
Biochem/physiol Actions
Phenol Red is a pH indicator which changes color from yellow to red.
PROPERTIES
grade
ACS reagent
Pack Size
25g
form
powder
clarity of soln
passes test
technique(s)
titration: suitable
visual transition interval
6.8-8.2, yellow to red
solubility
water: 0.77 g/L at 100 °C
λmax
360 nm
557 nm (2nd)
ε (extinction coefficient)
≥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
storage temp.
room temp
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