221556-19-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221556-19-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,5,5 and 6 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 221556-19:
(8*2)+(7*2)+(6*1)+(5*5)+(4*5)+(3*6)+(2*1)+(1*9)=110
110 % 10 = 0
So 221556-19-0 is a valid CAS Registry Number.