31111-31-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 31111-31-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,1,1 and 1 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 31111-31:
(7*3)+(6*1)+(5*1)+(4*1)+(3*1)+(2*3)+(1*1)=46
46 % 10 = 6
So 31111-31-6 is a valid CAS Registry Number.