2249-91-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2249-91-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,2,4 and 9 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 2249-91:
(6*2)+(5*2)+(4*4)+(3*9)+(2*9)+(1*1)=84
84 % 10 = 4
So 2249-91-4 is a valid CAS Registry Number.