313997-53-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 313997-53-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 3,1,3,9,9 and 7 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 313997-53:
(8*3)+(7*1)+(6*3)+(5*9)+(4*9)+(3*7)+(2*5)+(1*3)=164
164 % 10 = 4
So 313997-53-4 is a valid CAS Registry Number.