O-Cresolphthalein (CAS 596-27-0) is a fascinating organic compound whose chemical properties make it a valuable tool in various scientific disciplines. As a supplier of high-quality chemicals, we aim to provide researchers and formulators with a deeper understanding of the science behind our products. This article delves into the key properties and diverse applications of O-Cresolphthalein, highlighting why it remains a sought-after reagent.

At its core, O-Cresolphthalein is a triphenylmethane dye. Its most notable characteristic is its behavior as a pH indicator. In aqueous solutions, it displays a distinct color change: it is colorless in acidic and neutral conditions up to pH 8.2, and then transitions to a vibrant red or violet-red color as the pH increases to 9.8. This sharp, visible change makes it incredibly useful for monitoring the progress of acid-base titrations, particularly in analytical laboratories. Procurement specialists looking to buy pH indicators will find O-Cresolphthalein a reliable choice for accurate endpoint determination.

Scientifically, this pH-dependent color change is due to structural rearrangements within the molecule as it gains or loses protons. The extended conjugated pi system, responsible for its color, is altered by changes in pH, leading to different absorption spectra and thus, different perceived colors.

Another significant application of O-Cresolphthalein is its role in the colorimetric determination of calcium ions. In the presence of calcium ions and under alkaline conditions (typically pH 10-12), O-Cresolphthalein forms a colored complex. The intensity of this red complex is directly proportional to the concentration of calcium present in the sample. This principle is widely used in clinical diagnostics for measuring serum calcium levels, as well as in environmental monitoring and industrial quality control. When you purchase O-Cresolphthalein for these assays, ensuring high purity from a trusted manufacturer is vital for accurate quantification.

The molecule's structure also lends itself to applications in material science. Its ability to change color in response to specific chemical environments makes it suitable for incorporation into sensors. For instance, it can be used in optical sensors for detecting changes in solution chemistry or as a component in smart materials. R&D scientists looking to buy O-Cresolphthalein for material development will appreciate its reactive functional groups and predictable behavior.

As a manufacturer and supplier of O-Cresolphthalein, we are committed to providing consistent quality that supports these scientific endeavors. Whether your interest lies in precise pH measurement, accurate calcium assays, or innovative material development, our O-Cresolphthalein is manufactured to meet your needs. We invite you to explore our product offerings and contact us to buy O-Cresolphthalein or to get a quotation, ensuring you have a reliable supply of this essential chemical.