Acid-base titrations are a cornerstone of quantitative chemical analysis, allowing chemists to determine the concentration of an unknown solution by reacting it with a solution of known concentration. A critical component in these titrations is the indicator – a substance that changes color at or near the equivalence point, signaling the completion of the reaction. Among the various indicators available, alpha-Naphtholphthalein (CAS 596-01-0) holds a significant position due to its specific properties.

Alpha-Naphtholphthalein is a synthetic organic compound that functions effectively as a pH indicator. Its utility in titrations stems from its distinct color transition range. Typically, it changes from a colorless or reddish state to a blue or greenish-blue color over a pH interval of approximately 7.3 to 8.7. This specific range makes it particularly suitable for titrations involving weak acids and strong bases, or vice versa, where the equivalence point falls within this pH spectrum.

The choice of indicator is crucial for obtaining accurate results in titrations. An inappropriate indicator can lead to a significant error in determining the concentration of the analyte. Alpha-Naphtholphthalein is often preferred when phenolphthalein (which has a transition range of 8.2-10.0) is not sensitive enough or when a slightly different endpoint pH is desired. Its solubility in ethanol, a common solvent in titrations, further enhances its practicality. Researchers looking to buy alpha-Naphtholphthalein for their titrations can be confident in its performance.

NINGBO INNO PHARMCHEM CO.,LTD. supplies alpha-Naphtholphthalein, providing researchers and analytical chemists with a reliable source for this essential titration component. The availability of this compound from a trusted supplier ensures that laboratories can consistently perform accurate analyses. Understanding the specific pH range and the corresponding color changes of alpha-Naphtholphthalein is key to mastering its application in titration methods.

In summary, alpha-Naphtholphthalein is a valuable tool in the analytical chemist's arsenal. Its specific transition range and favorable solubility characteristics make it an excellent choice for various acid-base titrations, contributing to the precision and reliability of chemical analysis in laboratories worldwide.