The CAS Registry Mumber 47529-22-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,7,5,2 and 9 respectively; the second part has 2 digits, 2 and 2 respectively. Calculate Digit Verification of CAS Registry Number 47529-22: (7*4)+(6*7)+(5*5)+(4*2)+(3*9)+(2*2)+(1*2)=136 136 % 10 = 6 So 47529-22-6 is a valid CAS Registry Number.