The CAS Registry Mumber 96935-92-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,6,9,3 and 5 respectively; the second part has 2 digits, 9 and 2 respectively. Calculate Digit Verification of CAS Registry Number 96935-92: (7*9)+(6*6)+(5*9)+(4*3)+(3*5)+(2*9)+(1*2)=191 191 % 10 = 1 So 96935-92-1 is a valid CAS Registry Number.