In the realm of chemical analysis, precision is paramount. Among the essential tools available to scientists and researchers, pH indicators play a crucial role in determining the acidity or alkalinity of solutions. One such indispensable compound is Cresol Red. As a versatile pH indicator, Cresol Red is recognized for its distinctive color transitions, making it a valuable asset in various scientific disciplines. This article delves into the properties, applications, and the fundamental science behind Cresol Red, highlighting why it remains a staple in laboratories worldwide. Understanding the Cresol Red pH indicator range is a foundational step for many analytical procedures.

Cresol Red, scientifically identified by its CAS number 62625-29-0, is a synthetic organic compound belonging to the sulfonphthalein group of pH indicators. Its chemical structure, represented by the molecular formula C21H19NaO5S, dictates its behavior in solution. Typically supplied as a brown powder, Cresol Red exhibits good solubility in water and ethanol, facilitating its preparation into indicator solutions. These characteristics are fundamental to grasping the Cresol Red chemical properties that make it so useful.

One of the most significant aspects of Cresol Red is its dual pH transition range. It undergoes a color change from red to yellow in the strongly acidic range (pH 0.2-1.8) and another transition from yellow to red in the weakly alkaline range (pH 7.2-8.8). This dual functionality allows it to be employed in a broader spectrum of pH monitoring tasks compared to indicators with a single transition range. This makes it a particularly useful indicator for titrations that span across these pH intervals. For those looking to procure this essential chemical, understanding the ease of buying Cresol Red online is also a practical consideration for lab managers.

Beyond its primary role as a pH indicator, Cresol Red has found its way into several specialized applications. It is utilized in the development of thermochromic materials, which change color with temperature variations, demonstrating its responsiveness to environmental changes. Furthermore, Cresol Red is incorporated into certain cosmetic formulations, contributing to their aesthetic appeal or functional properties. In pharmaceutical research, it plays a role in measuring the hydrophobicity of therapeutic drugs, a critical parameter in drug development and delivery systems. These diverse Cresol Red applications underscore its significance across multiple scientific and industrial sectors.

The reliability of Cresol Red stems from its well-defined chemical behavior and the consistent results it provides. When performing acid-base titrations, understanding the exact pH range where the indicator changes color is crucial for accurate endpoint determination. Researchers often refer to the specific Cresol Red pH indicator range to select the most appropriate indicator for their specific titration needs. The detailed information available regarding its Cresol Red CAS number and associated safety data sheets further solidifies its position as a trusted laboratory reagent.

In conclusion, Cresol Red is more than just a color-changing chemical; it is a vital analytical tool. Its distinct properties, dual pH transition ranges, and diverse applications, from fundamental laboratory work to specialized fields like cosmetics and pharmaceuticals, make it an invaluable component of the modern scientific toolkit. Whether you are conducting routine titrations or engaged in advanced material science research, familiarizing yourself with Cresol Red is essential for achieving accurate and reliable results. For procurement, exploring options for buying Cresol Red online can streamline the process for laboratories.