Phenol Red Sodium Salt (CAS 34487-61-1) is a widely recognized synthetic organic compound, primarily utilized for its properties as a pH indicator. Its effectiveness stems from its molecular structure, which undergoes reversible changes in its electron configuration as the surrounding hydrogen ion concentration varies. This alteration in electronic state leads to a corresponding shift in how the molecule absorbs and reflects light, manifesting as a visible color change. Specifically, Phenol Red Sodium Salt transitions from yellow in acidic solutions (below pH 6.8) to red in alkaline solutions (above pH 8.4), with a vibrant pinkish-red hue in between.

The mechanism involves protonation and deprotonation of specific functional groups within the molecule. In acidic conditions, the molecule is largely protonated, leading to absorption in the shorter wavelengths, thus appearing yellow. As the solution becomes more alkaline, protons are removed, altering the conjugated pi system and causing absorption to shift towards longer wavelengths, resulting in the red appearance. This predictable and distinct color change makes it an invaluable tool for a multitude of scientific endeavors, from basic laboratory experiments to industrial process monitoring. For researchers and manufacturers, understanding this scientific basis is key when they choose to buy Phenol Red Sodium Salt.

As a product of organic chemistry, the synthesis and purification of Phenol Red Sodium Salt are critical for ensuring its reliability as an indicator. NINGBO INNO PHARMCHEM CO.,LTD., a leading manufacturer in China, specializes in producing high-purity Phenol Red Sodium Salt that meets the rigorous demands of scientific and industrial applications. Their commitment to quality control ensures that each batch delivers consistent indicator performance, making them a trusted source for chemical intermediates and specialty chemicals required for accurate pH determination.