The CAS Registry Mumber 5368-95-6 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,3,6 and 8 respectively; the second part has 2 digits, 9 and 5 respectively. Calculate Digit Verification of CAS Registry Number 5368-95: (6*5)+(5*3)+(4*6)+(3*8)+(2*9)+(1*5)=116 116 % 10 = 6 So 5368-95-6 is a valid CAS Registry Number.