Reagents for medical purposes for use in nucleic acid isolation and purification; reagents for extracting nucleic acid for medical purposes; reagents for DNA or RNA extraction for medical purposes; reagents for extracting nucleic acid for veterinary purposes; reagents for DNA or RNA extraction for veterinary purposes; diagnostic test kit for medical purposes; diagnostic reagents for medical laboratory or clinical purposes; diagnostic reagents for medical use; diagnostic reagents for medical use used for the diagnosis of the genetic disease and cancer; diagnostic test kit for medical use used for the diagnosis of the genetic disease and cancer; diagnostic kits comprising medical diagnostic reagents for the detection of the infection of the virus; diagnostic kits comprising medical diagnostic reagents for the detection of the infection of the microorganism; diagnostic kits comprising medical diagnostic reagents for the detection of the symptom of the contagious infection.