Phenol Red Sodium Salt, identified by its CAS number 34487-61-1, is a compound that plays a significant role in various scientific and industrial applications, primarily due to its function as a pH indicator. This organic dye exhibits a clear color change across a specific pH range, making it an invaluable tool for monitoring acidity and alkalinity.

The intrinsic property of Phenol Red Sodium Salt is its ability to transition between colors as the pH of the solution changes. Typically, it appears yellow in acidic conditions, below a pH of 6.8. As the pH increases into the neutral and slightly alkaline range, it turns red, with a transition point often cited around pH 7.5. Above pH 8.2, it can display a more purplish or fuchsia hue. This predictable color change allows researchers and technicians to visually assess the pH of a solution without needing specialized equipment, a crucial advantage when precise pH adjustments are needed. This makes it a key chemical reagent for many laboratory processes.

One of the most widespread applications of Phenol Red Sodium Salt is in cell culture media. Cells in culture produce metabolic byproducts that can alter the pH of the surrounding medium. By including Phenol Red Sodium Salt in the media, scientists can visually monitor the health and growth of their cell cultures. A shift from red to yellow might indicate that the cells are producing too much acid, suggesting a need for fresh media or that the culture is becoming overly confluent. This visual cue aids in maintaining optimal conditions for sensitive cell lines, ensuring the reliability of experimental outcomes. Sourcing this from a reliable chemical supplier in China ensures consistent quality for these critical applications.

Beyond cell culture, Phenol Red Sodium Salt is also utilized in various analytical chemistry techniques, such as titrations. Its sharp color change at the equivalence point helps in accurately determining the concentration of acids and bases. This precision is vital in quality control processes across industries like pharmaceuticals and food and beverage. The ability to buy Phenol Red Sodium Salt online from trusted manufacturers further democratizes its use in smaller laboratories and research projects.

Furthermore, this compound serves as an intermediate for organic synthesis. Its chemical structure allows it to participate in a variety of reactions, making it a building block for more complex molecules. The demand for high-quality intermediates like Phenol Red Sodium Salt fuels the growth of chemical manufacturing in regions like China, where companies specialize in producing these essential compounds.

In summary, Phenol Red Sodium Salt (CAS 34487-61-1) is a versatile and indispensable chemical compound. Its efficacy as a pH indicator in cell culture, analytical chemistry, and industrial processes, coupled with its utility as an intermediate for organic synthesis, solidifies its importance. Researchers and industries seeking reliable chemical solutions can find this compound readily available, often from specialized manufacturers and suppliers in China.