221298-99-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221298-99-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,2,9 and 8 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 221298-99:
(8*2)+(7*2)+(6*1)+(5*2)+(4*9)+(3*8)+(2*9)+(1*9)=133
133 % 10 = 3
So 221298-99-3 is a valid CAS Registry Number.