18331-99-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 18331-99-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,3,3 and 1 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 18331-99:
(7*1)+(6*8)+(5*3)+(4*3)+(3*1)+(2*9)+(1*9)=112
112 % 10 = 2
So 18331-99-2 is a valid CAS Registry Number.