20781-16-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20781-16-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,7,8 and 1 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 20781-16:
(7*2)+(6*0)+(5*7)+(4*8)+(3*1)+(2*1)+(1*6)=92
92 % 10 = 2
So 20781-16-2 is a valid CAS Registry Number.