In the realm of chemistry, precise measurement and control are paramount. Central to this is the understanding of acidity and alkalinity, commonly quantified by pH. pH indicators are substances that undergo a visible change, usually a color change, at specific pH values, making them indispensable tools in titration and general pH monitoring. Among these vital compounds, Cresol Red stands out for its utility and distinct characteristics.

Cresol Red, known by its CAS number 62625-29-0, is a sulfonphthalein dye that exhibits a sharp color transition. Its primary function as a pH indicator is supported by its ability to change color across two distinct pH ranges. The first transition occurs from red at pH 0.2 to yellow at pH 1.8, indicating strongly acidic conditions. The second, and often more utilized range, sees a shift from yellow at pH 7.2 to red at pH 8.8, signaling the transition from neutral to alkaline environments. This dual functionality makes Cresol Red a versatile tool for chemists, allowing them to accurately determine the equivalence point in titrations involving weak acids and strong bases, or vice versa. The ability to buy Cresol Red from reliable suppliers like NINGBO INNO PHARMCHEM CO.,LTD. ensures consistent quality for these critical applications.

Beyond its role in traditional analytical chemistry, Cresol Red has garnered attention for its thermochromic properties. This means it can change color in response to temperature variations. While its primary use remains as a pH indicator, this thermochromic behavior opens up possibilities in material science, such as in the development of temperature-sensitive coatings or dyes. Exploring the purchase of Cresol Red for such innovative applications can lead to unique product developments.

The availability of Cresol Red as a brown powder with good solubility in water and ethanol makes it easy to prepare indicator solutions. When considering the price and sourcing of this chemical, working with established manufacturers ensures not only competitive pricing but also adherence to quality standards. For researchers and industrial chemists, understanding the specific applications and purchasing Cresol Red is a crucial step in achieving accurate and reliable results in their work. The quest for high-quality Cresol Red is often driven by the need for precise pH measurement and the exploration of its thermochromic potential.