81389-40-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81389-40-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,3,8 and 9 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 81389-40:
(7*8)+(6*1)+(5*3)+(4*8)+(3*9)+(2*4)+(1*0)=144
144 % 10 = 4
So 81389-40-4 is a valid CAS Registry Number.