221049-50-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221049-50-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,0,4 and 9 respectively; the second part has 2 digits, 5 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 221049-50:
(8*2)+(7*2)+(6*1)+(5*0)+(4*4)+(3*9)+(2*5)+(1*0)=89
89 % 10 = 9
So 221049-50-9 is a valid CAS Registry Number.