At NINGBO INNO PHARMCHEM CO.,LTD., we are fascinated by the intricate chemistry that underlies our products, and M-Cresol Purple Sodium Salt (CAS 62625-31-4) is a prime example of this. As a member of the sulfonephthalein family of dyes, its properties as a pH indicator are rooted in its molecular structure and behavior in aqueous solutions. Understanding the chemistry of sulfonephthalein dyes provides insight into why this compound is so effective.

Sulfonephthalein dyes are characterized by a central sulfuryl group attached to two phenyl rings. M-Cresol Purple Sodium Salt is derived from m-cresol and thymol blue, featuring hydroxyl and sulfonic acid groups. These functional groups are responsible for its pH-sensitive properties. In acidic conditions, the dye exists in a protonated form, exhibiting one set of colors, while in alkaline conditions, it loses protons and adopts an ionized form with different colors. This reversible process is what makes it an excellent pH indicator.

The specific molecular arrangement in M-Cresol Purple Sodium Salt dictates its distinctive m-cresol purple sodium salt pH range for color transitions. The presence of the methyl groups on the phenol rings influences the acidity of the phenolic protons, thereby shifting the observed pH ranges compared to other sulfonephthaleins. Its transition from red to yellow between pH 1.2 and 2.8, and from yellow to purple between pH 7.4 and 9.0, are direct consequences of these structural nuances.

When you buy M-Cresol Purple Sodium Salt, you are acquiring a compound whose effectiveness as a pH indicator is scientifically proven. Its solubility in water is attributed to the presence of the sodium salt of the sulfonic acid group, enhancing its usability in aqueous laboratory settings. The typical appearance of the compound as an orange-brown to black powder does not detract from its precise analytical capabilities.

For researchers seeking to understand or utilize pH indicators, studying the chemistry of compounds like M-Cresol Purple Sodium Salt offers valuable insights. NINGBO INNO PHARMCHEM CO.,LTD. is committed to providing high-quality chemicals that meet the exacting standards of scientific inquiry. Whether for titration, environmental screening, or general laboratory analysis, the chemical properties of CAS 62625-31-4 make it a dependable choice.