Product Description: m-Cresol purple sodium (Metacresol purple sodium) is a pH indicator. m-Cresol purple sodium solution from yellow to blue in the pH range from 7.5 to 9.0[1].
Formula: C21H17NaO5S
References: [1]Zou X, et al. m-Cresol purple functionalized surface enhanced Raman scattering paper chips for highly sensitive detection of pH in the neutral pH range. Analyst. 2017 Jun 26;142(13):2333-2337.