The CAS Registry Mumber 76051-36-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,6,0,5 and 1 respectively; the second part has 2 digits, 3 and 6 respectively. Calculate Digit Verification of CAS Registry Number 76051-36: (7*7)+(6*6)+(5*0)+(4*5)+(3*1)+(2*3)+(1*6)=120 120 % 10 = 0 So 76051-36-0 is a valid CAS Registry Number.