20491-68-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20491-68-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,4,9 and 1 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 20491-68:
(7*2)+(6*0)+(5*4)+(4*9)+(3*1)+(2*6)+(1*8)=93
93 % 10 = 3
So 20491-68-3 is a valid CAS Registry Number.