The CAS Registry Mumber 60619-05-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,0,6,1 and 9 respectively; the second part has 2 digits, 0 and 5 respectively. Calculate Digit Verification of CAS Registry Number 60619-05: (7*6)+(6*0)+(5*6)+(4*1)+(3*9)+(2*0)+(1*5)=108 108 % 10 = 8 So 60619-05-8 is a valid CAS Registry Number.