The CAS Registry Mumber 361483-69-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,6,1,4,8 and 3 respectively; the second part has 2 digits, 6 and 9 respectively. Calculate Digit Verification of CAS Registry Number 361483-69: (8*3)+(7*6)+(6*1)+(5*4)+(4*8)+(3*3)+(2*6)+(1*9)=154 154 % 10 = 4 So 361483-69-4 is a valid CAS Registry Number.