The CAS Registry Mumber 1315483-39-6 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,1,5,4,8 and 3 respectively; the second part has 2 digits, 3 and 9 respectively. Calculate Digit Verification of CAS Registry Number 1315483-39: (9*1)+(8*3)+(7*1)+(6*5)+(5*4)+(4*8)+(3*3)+(2*3)+(1*9)=146 146 % 10 = 6 So 1315483-39-6 is a valid CAS Registry Number.