Phenol Red WS Indicator Powder, O.R. *


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Phenol Red, Sodium Salt, chemically known as Sodium 4-(3-(4-hydroxyphenyl)-1,1-dioxido- 3H-benzo[c][1,2]oxathiol-3-yl)phenolate or Phenolsulfonephthalein Sodium Salt, has the chemical formula C19H14O5S. Phenol Red, Sodium Salt is a pH indicator that changes color from yellow (pH 8.2). It appears as a red powder and is soluble in Water at ambient conditions. Chemically pure or Laboratory reagents are the two terms often used to describe Lab Grade chemicals. Lab Grade chemicals do not meet any accepted quality or purity requirements such as the ACS Grade, the USP Grade, and the FCC Grade, despite their acceptable purity. In the United States of America (USA), Lab Alley is selling its high-quality Phenol Red, Sodium Salt, Lab Grade online at Due to its high purity, Phenol Red, Sodium Salt, Lab Grade is highly recommended for labs and commercial applications.

Phenol Red WS Indicator Powder O.R. Features:

Visual Transition Interval pH 6.8 (yellow) to pH 8.2 (red)
Clarity of Solution To Pass Test
Common Uses
  • Reagent
  • Biological labs
  • Analytical studies
Safety and Handling

Please contact us to request a Safety Data Sheet (SDS) and Certificate of Analysis (COA) for Phenol Red WS Indicator Powder O.R.

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