221341-43-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221341-43-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,3,4 and 1 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 221341-43:
(8*2)+(7*2)+(6*1)+(5*3)+(4*4)+(3*1)+(2*4)+(1*3)=81
81 % 10 = 1
So 221341-43-1 is a valid CAS Registry Number.