For professionals in chemistry and biology laboratories, understanding the tools of the trade is paramount. One such indispensable reagent is Phenol Red, known scientifically by its CAS number 143-74-8. This vibrant compound plays a critical role as an acid-base indicator, assisting researchers and technicians in precise chemical analyses. As a leading manufacturer and supplier of high-quality laboratory chemicals in China, we aim to illuminate the utility and importance of Phenol Red for your daily operations.

Phenol Red is characterized by its deep red crystalline powder appearance. Its molecular formula, C19H14O5S, and molecular weight of 354.38 provide the foundational specifications for its chemical identity. What makes Phenol Red particularly valuable is its solubility in common laboratory solvents like water, alcohol, and acetone, while remaining largely insoluble in ether and chloroform. This property facilitates its easy integration into various aqueous and alcoholic solutions for testing.

The primary function of Phenol Red is its role as a pH indicator. It exhibits a distinct color change across a specific pH range, typically from yellow at pH 6.8 to red at pH 8.4. This distinct transition allows for accurate visual determination of the endpoint in acid-base titrations, a fundamental technique in analytical chemistry. Purchasing Phenol Red from a reliable China manufacturer ensures that you receive a product with a consistent and predictable discoloration range, crucial for reproducible experimental results.

Beyond its utility in titrations, Phenol Red finds application in more specialized areas. It is utilized in the measurement of the total carbon dioxide content in blood, a vital parameter in clinical diagnostics. Furthermore, its properties make it suitable for use in microbial culture media, often as a differential agent to observe metabolic activities of different bacterial strains. For those in the medical field, the sodium salt of Phenol Red is a recognized reagent for determining liver function, highlighting its broad impact across scientific disciplines.

When considering where to buy Phenol Red, opting for a reputable China supplier like ourselves offers significant advantages. We provide Phenol Red that meets stringent enterprise standards, with a minimum assay of 98.0% and particle size specifications (95% pass through 80 mesh) suitable for most laboratory applications. Our commitment extends to offering competitive factory prices and readily available stock, ensuring you can procure this essential chemical without delay. For procurement inquiries or to request a quote for Phenol Red, please reach out to our sales team.