The CAS Registry Mumber 149206-86-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,9,2,0 and 6 respectively; the second part has 2 digits, 8 and 6 respectively. Calculate Digit Verification of CAS Registry Number 149206-86: (8*1)+(7*4)+(6*9)+(5*2)+(4*0)+(3*6)+(2*8)+(1*6)=140 140 % 10 = 0 So 149206-86-0 is a valid CAS Registry Number.