21980-11-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21980-11-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,9,8 and 0 respectively; the second part has 2 digits, 1 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 21980-11:
(7*2)+(6*1)+(5*9)+(4*8)+(3*0)+(2*1)+(1*1)=100
100 % 10 = 0
So 21980-11-0 is a valid CAS Registry Number.