The CAS Registry Mumber 85276-62-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,5,2,7 and 6 respectively; the second part has 2 digits, 6 and 2 respectively. Calculate Digit Verification of CAS Registry Number 85276-62: (7*8)+(6*5)+(5*2)+(4*7)+(3*6)+(2*6)+(1*2)=156 156 % 10 = 6 So 85276-62-6 is a valid CAS Registry Number.