The CAS Registry Mumber 94852-59-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,4,8,5 and 2 respectively; the second part has 2 digits, 5 and 9 respectively. Calculate Digit Verification of CAS Registry Number 94852-59: (7*9)+(6*4)+(5*8)+(4*5)+(3*2)+(2*5)+(1*9)=172 172 % 10 = 2 So 94852-59-2 is a valid CAS Registry Number.