The CAS Registry Mumber 92013-76-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,2,0,1 and 3 respectively; the second part has 2 digits, 7 and 6 respectively. Calculate Digit Verification of CAS Registry Number 92013-76: (7*9)+(6*2)+(5*0)+(4*1)+(3*3)+(2*7)+(1*6)=108 108 % 10 = 8 So 92013-76-8 is a valid CAS Registry Number.