The CAS Registry Mumber 92074-22-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,2,0,7 and 4 respectively; the second part has 2 digits, 2 and 2 respectively. Calculate Digit Verification of CAS Registry Number 92074-22: (7*9)+(6*2)+(5*0)+(4*7)+(3*4)+(2*2)+(1*2)=121 121 % 10 = 1 So 92074-22-1 is a valid CAS Registry Number.