Used as a key intermediate in the synthesis of angiotensin II receptor antagonists, particularly in the production of sartan-class antihypertensive drugs such as valsartan and losartan. It serves as a protected tetrazole building block, enabling selective reactions at other functional sites during multi-step pharmaceutical syntheses. Its trityl (triphenylmethyl) group provides stability and prevents unwanted side reactions, making it valuable in solid-phase and solution-phase peptide and heterocycle chemistry. Also employed in the development of novel bioactive molecules where the tetrazole ring acts as a bioisostere for carboxylic acid groups.