18311-20-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 18311-20-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,3,1 and 1 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 18311-20:
(7*1)+(6*8)+(5*3)+(4*1)+(3*1)+(2*2)+(1*0)=81
81 % 10 = 1
So 18311-20-1 is a valid CAS Registry Number.