The CAS Registry Mumber 92995-20-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,2,9,9 and 5 respectively; the second part has 2 digits, 2 and 0 respectively. Calculate Digit Verification of CAS Registry Number 92995-20: (7*9)+(6*2)+(5*9)+(4*9)+(3*5)+(2*2)+(1*0)=175 175 % 10 = 5 So 92995-20-5 is a valid CAS Registry Number.