The present invention provides a crystal of 2-[4-(2,2-dimethylpropoxy)-3-(1H-1,2,3,4-tetrazole-1-yl)pheny l]-4-methyl-1,3-thiazole-5-carboxylic acid, said crystal being useful as a therapeutic agent or a prophylactic agent for gout, hyperuricemia, and the like.La presente invención proporciona un cristal del ácido 2-[4-(2,2-dimetilpropoxi)-3-(1H-1,2,3,4-tetrazol-1-il)fenil]-4-me til-1,3-tiazol-5-carboxílico, dicho cristal es útil como un agente terapéutico o un agente profiláctico para gota, hiperuricemia, y similares.
