The CAS Registry Mumber 3592-14-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,5,9 and 2 respectively; the second part has 2 digits, 1 and 4 respectively. Calculate Digit Verification of CAS Registry Number 3592-14: (6*3)+(5*5)+(4*9)+(3*2)+(2*1)+(1*4)=91 91 % 10 = 1 So 3592-14-1 is a valid CAS Registry Number.