18108-91-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 18108-91-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,1,0 and 8 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 18108-91:
(7*1)+(6*8)+(5*1)+(4*0)+(3*8)+(2*9)+(1*1)=103
103 % 10 = 3
So 18108-91-3 is a valid CAS Registry Number.