4531-91-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 4531-91-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,5,3 and 1 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 4531-91:
(6*4)+(5*5)+(4*3)+(3*1)+(2*9)+(1*1)=83
83 % 10 = 3
So 4531-91-3 is a valid CAS Registry Number.