In the intricate world of pharmaceutical research, precise measurement of various drug properties is essential for ensuring efficacy and safety. Cresol Red, a chemical compound identified by its CAS number 62625-29-0, plays a specialized yet vital role in this domain, particularly in the assessment of drug hydrophobicity. While widely recognized as a pH indicator, its application in pharmaceutical science highlights its broader chemical versatility. The detailed understanding of its Cresol Red chemical properties enables these specialized uses.

Cresol Red, with the molecular formula C21H19NaO5S, is known for its distinctive color changes at specific pH levels. Its primary function as a pH indicator involves transitions from red to yellow (pH 0.2-1.8) and yellow to red (pH 7.2-8.8). However, in pharmaceutical studies, these colorimetric changes are harnessed to quantify the hydrophobicity of drug molecules. This is often achieved by observing how the presence of the drug influences the indicator's color response in a controlled environment.

Hydrophobicity, or water-repelling character, is a critical parameter for drug candidates. It influences a drug's ability to cross biological membranes, its solubility, and its overall pharmacokinetic profile – how the body absorbs, distributes, metabolizes, and excretes the drug. By utilizing Cresol Red, researchers can gain valuable insights into these behaviors early in the drug development process. This showcases a sophisticated application of the Cresol Red pH indicator range that goes beyond simple acidity testing.

The use of Cresol Red in these studies exemplifies how fundamental chemical properties can be leveraged for complex scientific challenges. Its consistent performance and well-defined color transitions make it a reliable tool for quantitative analysis. The ease with which it can be procured, with options for buying Cresol Red online, further supports its adoption in research settings worldwide. The specific Cresol Red CAS number ensures that researchers are obtaining the correct grade and form of the chemical.

In conclusion, while Cresol Red is commonly known as a pH indicator, its contribution to pharmaceutical research, particularly in measuring drug hydrophobicity, is equally significant. This specialized application underscores the compound's versatility and the ingenuity with which chemists apply fundamental properties to solve complex problems. For professionals in the pharmaceutical industry, understanding these advanced Cresol Red applications is key to optimizing drug development.