7243-31-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 7243-31-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,2,4 and 3 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 7243-31:
(6*7)+(5*2)+(4*4)+(3*3)+(2*3)+(1*1)=84
84 % 10 = 4
So 7243-31-4 is a valid CAS Registry Number.