181809-40-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 181809-40-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,1,8,0 and 9 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 181809-40:
(8*1)+(7*8)+(6*1)+(5*8)+(4*0)+(3*9)+(2*4)+(1*0)=145
145 % 10 = 5
So 181809-40-5 is a valid CAS Registry Number.