The CAS Registry Mumber 1449337-62-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,4,4,9,3,3 and 7 respectively; the second part has 2 digits, 6 and 2 respectively. Calculate Digit Verification of CAS Registry Number 1449337-62: (9*1)+(8*4)+(7*4)+(6*9)+(5*3)+(4*3)+(3*7)+(2*6)+(1*2)=185 185 % 10 = 5 So 1449337-62-5 is a valid CAS Registry Number.