The CAS Registry Mumber 96352-58-8 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 2 respectively; the second part has 2 digits, 5 and 8 respectively. Calculate Digit Verification of CAS Registry Number 96352-58: (7*9)+(6*6)+(5*3)+(4*5)+(3*2)+(2*5)+(1*8)=158 158 % 10 = 8 So 96352-58-8 is a valid CAS Registry Number.