18231-13-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 18231-13-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,2,3 and 1 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 18231-13:
(7*1)+(6*8)+(5*2)+(4*3)+(3*1)+(2*1)+(1*3)=85
85 % 10 = 5
So 18231-13-5 is a valid CAS Registry Number.