The CAS Registry Mumber 95313-00-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,5,3,1 and 3 respectively; the second part has 2 digits, 0 and 0 respectively. Calculate Digit Verification of CAS Registry Number 95313-00: (7*9)+(6*5)+(5*3)+(4*1)+(3*3)+(2*0)+(1*0)=121 121 % 10 = 1 So 95313-00-1 is a valid CAS Registry Number.