181289-21-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 181289-21-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,1,2,8 and 9 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 181289-21:
(8*1)+(7*8)+(6*1)+(5*2)+(4*8)+(3*9)+(2*2)+(1*1)=144
144 % 10 = 4
So 181289-21-4 is a valid CAS Registry Number.