680220-77-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 680220-77-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,8,0,2,2 and 0 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 680220-77:
(8*6)+(7*8)+(6*0)+(5*2)+(4*2)+(3*0)+(2*7)+(1*7)=143
143 % 10 = 3
So 680220-77-3 is a valid CAS Registry Number.