2399-81-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2399-81-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,3,9 and 9 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 2399-81:
(6*2)+(5*3)+(4*9)+(3*9)+(2*8)+(1*1)=107
107 % 10 = 7
So 2399-81-7 is a valid CAS Registry Number.