The CAS Registry Mumber 47301-10-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,7,3,0 and 1 respectively; the second part has 2 digits, 1 and 0 respectively. Calculate Digit Verification of CAS Registry Number 47301-10: (7*4)+(6*7)+(5*3)+(4*0)+(3*1)+(2*1)+(1*0)=90 90 % 10 = 0 So 47301-10-0 is a valid CAS Registry Number.