The CAS Registry Mumber 79370-00-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,9,3,7 and 0 respectively; the second part has 2 digits, 0 and 0 respectively. Calculate Digit Verification of CAS Registry Number 79370-00: (7*7)+(6*9)+(5*3)+(4*7)+(3*0)+(2*0)+(1*0)=146 146 % 10 = 6 So 79370-00-6 is a valid CAS Registry Number.