The CAS Registry Mumber 32485-59-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,2,4,8 and 5 respectively; the second part has 2 digits, 5 and 9 respectively. Calculate Digit Verification of CAS Registry Number 32485-59: (7*3)+(6*2)+(5*4)+(4*8)+(3*5)+(2*5)+(1*9)=119 119 % 10 = 9 So 32485-59-9 is a valid CAS Registry Number.