20804-82-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20804-82-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,8,0 and 4 respectively; the second part has 2 digits, 8 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 20804-82:
(7*2)+(6*0)+(5*8)+(4*0)+(3*4)+(2*8)+(1*2)=84
84 % 10 = 4
So 20804-82-4 is a valid CAS Registry Number.