The CAS Registry Mumber 92314-64-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,2,3,1 and 4 respectively; the second part has 2 digits, 6 and 4 respectively. Calculate Digit Verification of CAS Registry Number 92314-64: (7*9)+(6*2)+(5*3)+(4*1)+(3*4)+(2*6)+(1*4)=122 122 % 10 = 2 So 92314-64-2 is a valid CAS Registry Number.