221203-40-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221203-40-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,2,0 and 3 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 221203-40:
(8*2)+(7*2)+(6*1)+(5*2)+(4*0)+(3*3)+(2*4)+(1*0)=63
63 % 10 = 3
So 221203-40-3 is a valid CAS Registry Number.