The CAS Registry Mumber 5892-38-6 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,8,9 and 2 respectively; the second part has 2 digits, 3 and 8 respectively. Calculate Digit Verification of CAS Registry Number 5892-38: (6*5)+(5*8)+(4*9)+(3*2)+(2*3)+(1*8)=126 126 % 10 = 6 So 5892-38-6 is a valid CAS Registry Number.