The CAS Registry Mumber 36295-27-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,6,2,9 and 5 respectively; the second part has 2 digits, 2 and 7 respectively. Calculate Digit Verification of CAS Registry Number 36295-27: (7*3)+(6*6)+(5*2)+(4*9)+(3*5)+(2*2)+(1*7)=129 129 % 10 = 9 So 36295-27-9 is a valid CAS Registry Number.