56720-81-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 56720-81-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,6,7,2 and 0 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 56720-81:
(7*5)+(6*6)+(5*7)+(4*2)+(3*0)+(2*8)+(1*1)=131
131 % 10 = 1
So 56720-81-1 is a valid CAS Registry Number.