The CAS Registry Mumber 96357-67-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,6,3,5 and 7 respectively; the second part has 2 digits, 6 and 7 respectively. Calculate Digit Verification of CAS Registry Number 96357-67: (7*9)+(6*6)+(5*3)+(4*5)+(3*7)+(2*6)+(1*7)=174 174 % 10 = 4 So 96357-67-4 is a valid CAS Registry Number.