Purity 1 : 99.999 +/- 0.00024
Purity 2: 99.999 +/- 0.00026
The isotop cpmposition of the ignot is as follows
63 Cu: 69.182 +/- 0.018
65 Cu: 30.818 +/- 0.018
Supplier: Cu 65 refined high purity copper isotopes (in ingot form) 99.999% only
