The CAS Registry Mumber 114829-70-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,4,8,2 and 9 respectively; the second part has 2 digits, 7 and 0 respectively. Calculate Digit Verification of CAS Registry Number 114829-70: (8*1)+(7*1)+(6*4)+(5*8)+(4*2)+(3*9)+(2*7)+(1*0)=128 128 % 10 = 8 So 114829-70-8 is a valid CAS Registry Number.