For chemists and researchers, selecting the appropriate pH indicator is paramount for achieving accurate and reliable results in titrations and analytical procedures. Among the most commonly used indicators is Phenolphthalein, known for its distinct color change from colorless in acidic solutions to pink in alkaline conditions. However, understanding its properties and comparing it with alternatives like Methyl Orange can significantly enhance experimental outcomes.

Phenolphthalein (CAS 77-09-8) is a triphenylmethane dye that transitions from colorless at pH values below 8.2 to a vibrant pink or fuchsia between pH 8.3 and 10.0. This makes it an excellent choice for titrations involving strong bases and weak acids, or strong acids and strong bases. As a widely recognized chemical supplier, we provide high-purity Phenolphthalein, ensuring consistent performance for laboratory and industrial applications. If you are looking to buy Phenolphthalein, our China-based manufacturing ensures competitive pricing and prompt delivery.

In contrast, Methyl Orange offers a different pH range for its color change. It transitions from red in acidic solutions (pH < 3.1) to yellow in alkaline solutions (pH > 4.4). This characteristic makes Methyl Orange ideal for titrations involving strong acids and weak bases. The choice between Phenolphthalein and Methyl Orange, therefore, depends heavily on the specific pH range expected at the equivalence point of the titration.

Beyond these two, other indicators like Bromothymol Blue (pH 6.0-7.6) and Litmus (pH 4.5-8.3) cater to different pH intervals. Understanding the pKa values and color change intervals of each indicator is crucial for selecting the most suitable one.

For procurement managers and research scientists, sourcing reliable indicators is key. As a dedicated Phenolphthalein manufacturer, NINGBO INNO PHARMCHEM CO.,LTD. guarantees the quality and availability of Phenolphthalein. We understand the importance of consistent product specifications for your work, whether it's in academic research, quality control, or forensic analysis. When you need to purchase Phenolphthalein, consider our expertise and commitment to excellence.

When evaluating your options, consider the purity and consistency offered by a reputable Phenolphthalein supplier. While alternatives exist, Phenolphthalein remains a workhorse for many standard laboratory procedures due to its clear visual endpoint in specific pH ranges. For any inquiries regarding purchasing Phenolphthalein or understanding its application, feel free to contact our expert team.