The CAS Registry Mumber 112848-92-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,2,8,4 and 8 respectively; the second part has 2 digits, 9 and 2 respectively. Calculate Digit Verification of CAS Registry Number 112848-92: (8*1)+(7*1)+(6*2)+(5*8)+(4*4)+(3*8)+(2*9)+(1*2)=127 127 % 10 = 7 So 112848-92-7 is a valid CAS Registry Number.