The CAS Registry Mumber 94565-43-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,4,5,6 and 5 respectively; the second part has 2 digits, 4 and 3 respectively. Calculate Digit Verification of CAS Registry Number 94565-43: (7*9)+(6*4)+(5*5)+(4*6)+(3*5)+(2*4)+(1*3)=162 162 % 10 = 2 So 94565-43-2 is a valid CAS Registry Number.