328-31-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 328-31-4 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 3,2 and 8 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 328-31:
(5*3)+(4*2)+(3*8)+(2*3)+(1*1)=54
54 % 10 = 4
So 328-31-4 is a valid CAS Registry Number.