The CAS Registry Mumber 46922-82-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,6,9,2 and 2 respectively; the second part has 2 digits, 8 and 2 respectively. Calculate Digit Verification of CAS Registry Number 46922-82: (7*4)+(6*6)+(5*9)+(4*2)+(3*2)+(2*8)+(1*2)=141 141 % 10 = 1 So 46922-82-1 is a valid CAS Registry Number.