263720-89-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 263720-89-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,6,3,7,2 and 0 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 263720-89:
(8*2)+(7*6)+(6*3)+(5*7)+(4*2)+(3*0)+(2*8)+(1*9)=144
144 % 10 = 4
So 263720-89-4 is a valid CAS Registry Number.