2291-51-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2291-51-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,2,9 and 1 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 2291-51:
(6*2)+(5*2)+(4*9)+(3*1)+(2*5)+(1*1)=72
72 % 10 = 2
So 2291-51-2 is a valid CAS Registry Number.