221444-63-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221444-63-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,4,4 and 4 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 221444-63:
(8*2)+(7*2)+(6*1)+(5*4)+(4*4)+(3*4)+(2*6)+(1*3)=99
99 % 10 = 9
So 221444-63-9 is a valid CAS Registry Number.