31309-76-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 31309-76-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,3,0 and 9 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 31309-76:
(7*3)+(6*1)+(5*3)+(4*0)+(3*9)+(2*7)+(1*6)=89
89 % 10 = 9
So 31309-76-9 is a valid CAS Registry Number.