20646-45-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20646-45-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,6,4 and 6 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 20646-45:
(7*2)+(6*0)+(5*6)+(4*4)+(3*6)+(2*4)+(1*5)=91
91 % 10 = 1
So 20646-45-1 is a valid CAS Registry Number.