The CAS Registry Mumber 76622-01-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,6,6,2 and 2 respectively; the second part has 2 digits, 0 and 1 respectively. Calculate Digit Verification of CAS Registry Number 76622-01: (7*7)+(6*6)+(5*6)+(4*2)+(3*2)+(2*0)+(1*1)=130 130 % 10 = 0 So 76622-01-0 is a valid CAS Registry Number.