2,3,5-Triphenyltetrazolium Chloride LR/AR is widely utilized for various biochemical reactions as a redox indicator. It appears as the white-colored crystalline powder with chemical formula C19H15ClN4 and molecular weight of 334.807 g/mol. This compound is also required for indicating cellular respiration and for differentiating between metabolically active & inactive tissues. It shows solubility in water, acetone, & ethanol whereas insolubility in the ether. 2,3,5-Triphenyltetrazolium Chloride LR/AR also assists in post-mortem for identification of myocardial infarction. It is completely free from impurities and assures long shelf life is stored under prescribed conditions.