The CAS Registry Mumber 929200-08-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,2,9,2,0 and 0 respectively; the second part has 2 digits, 0 and 8 respectively. Calculate Digit Verification of CAS Registry Number 929200-08: (8*9)+(7*2)+(6*9)+(5*2)+(4*0)+(3*0)+(2*0)+(1*8)=158 158 % 10 = 8 So 929200-08-8 is a valid CAS Registry Number.