20434-54-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20434-54-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,4,3 and 4 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 20434-54:
(7*2)+(6*0)+(5*4)+(4*3)+(3*4)+(2*5)+(1*4)=72
72 % 10 = 2
So 20434-54-2 is a valid CAS Registry Number.