129718-05-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 129718-05-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,9,7,1 and 8 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 129718-05:
(8*1)+(7*2)+(6*9)+(5*7)+(4*1)+(3*8)+(2*0)+(1*5)=144
144 % 10 = 4
So 129718-05-4 is a valid CAS Registry Number.