2004-81-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2004-81-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,0,0 and 4 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 2004-81:
(6*2)+(5*0)+(4*0)+(3*4)+(2*8)+(1*1)=41
41 % 10 = 1
So 2004-81-1 is a valid CAS Registry Number.