The CAS Registry Mumber 85592-10-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,5,5,9 and 2 respectively; the second part has 2 digits, 1 and 0 respectively. Calculate Digit Verification of CAS Registry Number 85592-10: (7*8)+(6*5)+(5*5)+(4*9)+(3*2)+(2*1)+(1*0)=155 155 % 10 = 5 So 85592-10-5 is a valid CAS Registry Number.