The CAS Registry Mumber 114685-01-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,4,6,8 and 5 respectively; the second part has 2 digits, 0 and 1 respectively. Calculate Digit Verification of CAS Registry Number 114685-01: (8*1)+(7*1)+(6*4)+(5*6)+(4*8)+(3*5)+(2*0)+(1*1)=117 117 % 10 = 7 So 114685-01-7 is a valid CAS Registry Number.