丙基红（PR）是一种用于实验室实验的合成染料。这种多用途染料在各种应用中是检测特定化合物的宝贵工具。其主要用途之一是用于生化实验，它可作为蛋白质和其他大分子的染色剂。此外，它在鉴定某些酶和测量其在反应中的活性方面至关重要。此外，它在鉴定特定细菌、真菌和病毒方面发挥作用。此外，它还表现出作为pH指示剂的实用性，根据溶液的pH值发生颜色变化。值得注意的是，丙基红还充当金属指示剂，在特定金属离子存在时改变其颜色。 Propyl red ( PR ) is a synthetic dye used in laboratory experiments. This versatile dye is a valuable tool for the detection of specific compounds in a variety of applications. One of its main uses is for biochemical experiments, which can be used as a dye for proteins and other macromolecules. In addition, it is crucial in identifying certain enzymes and measuring their activity in the reaction. In addition, it plays a role in the identification of specific bacteria, fungi and viruses. In addition, it also shows the practicability as a pH indicator, and the color changes according to the pH value of the solution. It is worth noting that propyl red also acts as a metal indicator, changing its color in the presence of specific metal ions.