72820-76-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 72820-76-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,2,8,2 and 0 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 72820-76:
(7*7)+(6*2)+(5*8)+(4*2)+(3*0)+(2*7)+(1*6)=129
129 % 10 = 9
So 72820-76-9 is a valid CAS Registry Number.