221211-81-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221211-81-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,2,1 and 1 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 221211-81:
(8*2)+(7*2)+(6*1)+(5*2)+(4*1)+(3*1)+(2*8)+(1*1)=70
70 % 10 = 0
So 221211-81-0 is a valid CAS Registry Number.