Tetraamminecopper perchlorate (TACP) is one of the most interesting explosive copper perchlorate-ammonia complexes. Despite the fact that this complex has been known for more than 100 years there is very little information in the literature about its detonation parameters. Impact sensitivity of TACP is slightly higher than that for PETN while friction sensitivity is between those for PETN and RDX. Detonation velocity for infinite diameter is 3230 m s(-1)(density 0.9 g cm(-3)). Critical diameter of TACP is low - less than 2 mm. Based on the heat of combustion measurement the previously published erroneous enthalpy of formation was corrected to -496 kJ mol(-1). Detonation heat of TACP is 4322 kJ kg(-1)and Gurney velocity is 1536 m s(-1). Experimentally measured detonation parameters of TACP were also compared with theoretically calculated values by the EXPLO5 code.