The CAS Registry Mumber 95512-63-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,5,5,1 and 2 respectively; the second part has 2 digits, 6 and 3 respectively. Calculate Digit Verification of CAS Registry Number 95512-63: (7*9)+(6*5)+(5*5)+(4*1)+(3*2)+(2*6)+(1*3)=143 143 % 10 = 3 So 95512-63-3 is a valid CAS Registry Number.