31918-39-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 31918-39-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,1,9,1 and 8 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 31918-39:
(7*3)+(6*1)+(5*9)+(4*1)+(3*8)+(2*3)+(1*9)=115
115 % 10 = 5
So 31918-39-5 is a valid CAS Registry Number.