In the field of microbiology, accurately identifying and differentiating bacterial species is fundamental to diagnostics, research, and industrial applications. A key tool in this process is the use of differential culture media, and prominently featured among these is Phenol Red (CAS: 143-74-8) based media. Its role as a pH indicator makes it indispensable for detecting and characterizing bacterial metabolic capabilities, particularly their ability to ferment specific carbohydrates.

Phenol Red is a pH indicator that changes color within a specific pH range, typically from yellow at acidic pHs (around 6.8) to red at neutral to alkaline pHs (around 7.4 and above). In microbiological settings, this property is leveraged in fermentation tests. Laboratories prepare culture broths containing a specific carbohydrate (like glucose, lactose, or sucrose) and Phenol Red. When a microorganism is inoculated into this medium, it may ferment the carbohydrate, producing acidic byproducts. This acid production lowers the pH of the medium, causing the Phenol Red to change from red to yellow. Some tests also include a Durham tube to detect gas production, which is indicated by an air bubble trapped in the inverted tube.

The ability of different bacteria to ferment specific sugars varies greatly, making these Phenol Red-based tests highly effective for differentiation. For instance, one bacterium might ferment glucose but not lactose, while another might ferment both. The resulting color changes (or lack thereof) provide clear visual cues for microbiologists. This makes Phenol Red a cornerstone reagent for identifying enteric bacteria and other microorganisms. For any laboratory involved in microbial analysis, securing a reliable supply of high-quality Phenol Red is essential. NINGBO INNO PHARMCHEM CO.,LTD., a prominent manufacturer and supplier from China, offers this vital chemical with guaranteed purity and at competitive prices, ensuring that diagnostic and research efforts are supported by dependable reagents.

The accuracy of these tests hinges on the quality and consistency of the Phenol Red used. Variations in purity can lead to ambiguous color changes or false positives/negatives. Therefore, sourcing Phenol Red from a reputable manufacturer that adheres to strict quality control standards is crucial. NINGBO INNO PHARMCHEM CO.,LTD. stands out as a premier provider, ensuring that their Phenol Red (CAS: 143-74-8) meets the rigorous demands of microbiological laboratories worldwide. Whether you need to buy Phenol Red for routine diagnostics or specialized research, our commitment to excellence guarantees a product that will perform reliably.