The CAS Registry Mumber 36092-20-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,6,0,9 and 2 respectively; the second part has 2 digits, 2 and 0 respectively. Calculate Digit Verification of CAS Registry Number 36092-20: (7*3)+(6*6)+(5*0)+(4*9)+(3*2)+(2*2)+(1*0)=103 103 % 10 = 3 So 36092-20-3 is a valid CAS Registry Number.