Phenolphthalein, identified by its CAS number 77-09-8, stands as a fundamental compound in the realm of analytical chemistry. Its most renowned application is as a pH indicator, a role it fulfills with remarkable precision. As a white crystalline powder, it is largely insoluble in water but readily dissolves in alcoholic solutions, a characteristic that dictates many of its laboratory uses. The typical phenolphthalein assay is between 98% and 101%, a testament to its purity and suitability for sensitive experiments.

The utility of phenolphthalein stems from its predictable color change. In acidic solutions, it remains colorless, but as the solution becomes alkaline, it transitions to a vibrant pink or fuchsia. This distinct shift occurs within a specific pH range, typically between pH 8.2 and 10.0, making it an ideal indicator for titrations involving strong acids and bases, or weak acids and strong bases. Understanding the phenolphthalein chemical properties is crucial for any chemist working with acid-base titrations. For instance, its phenolphthalein melting point of around 260℃ signifies its stability under moderate temperature conditions.

Beyond its primary function as a pH indicator, phenolphthalein has found other applications, though its use as a laxative has been largely discontinued due to safety concerns. In research and educational settings, it remains invaluable. Students learn about its phenolphthalein solubility in alcohol and its role in observing chemical reactions firsthand. The availability of phenolphthalein at high purity levels, often specified by its phenolphthalein assay 98%, ensures that experimental results are reliable and reproducible. When considering the purchase of this essential chemical, looking for suppliers offering competitive phenolphthalein price and reliable phenolphthalein buy options is paramount for equipping a laboratory effectively.

NINGBO INNO PHARMCHEM CO.,LTD. is a leading provider of high-quality chemical reagents. We are committed to supplying researchers and institutions with the essential materials they need to conduct groundbreaking work. Our phenolphthalein meets rigorous standards, ensuring consistent performance for all your analytical needs. We understand the importance of reliable chemical suppliers in the scientific community. Whether you need phenolphthalein for routine laboratory analysis or more complex chemical research, NINGBO INNO PHARMCHEM CO.,LTD. is your trusted partner.