The CAS Registry Mumber 96244-97-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,6,2,4 and 4 respectively; the second part has 2 digits, 9 and 7 respectively. Calculate Digit Verification of CAS Registry Number 96244-97: (7*9)+(6*6)+(5*2)+(4*4)+(3*4)+(2*9)+(1*7)=162 162 % 10 = 2 So 96244-97-2 is a valid CAS Registry Number.