Method of storing tetrazolium compound, stabilizer for use therein, and tetrazolium compound reagent solution stored by the method

This invention claims a method for and a 5-membered 鎓 the method for preparing the compound. At a 5-membered 鎓 and sodium azide coexistent condition is preserved. 3-12 鎓 adding ratio of compound and sodium azide (A∶B) in the range of 1∶0.02~1∶6.2. The presence of group of solution a, the sodium azide the concentration range of 0.08~3.3mmol/L. 3-12 鎓 compound from 2 to 4 and in an amount of 3 to 2,4 for synthesizing arylamine phenyl) - 5 to 2,4 of the sulfophenyl) 2h-benzo 3-12 鎓 thereof.