The CAS Registry Mumber 36912-58-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,6,9,1 and 2 respectively; the second part has 2 digits, 5 and 8 respectively. Calculate Digit Verification of CAS Registry Number 36912-58: (7*3)+(6*6)+(5*9)+(4*1)+(3*2)+(2*5)+(1*8)=130 130 % 10 = 0 So 36912-58-0 is a valid CAS Registry Number.