20804-39-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20804-39-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,8,0 and 4 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 20804-39:
(7*2)+(6*0)+(5*8)+(4*0)+(3*4)+(2*3)+(1*9)=81
81 % 10 = 1
So 20804-39-1 is a valid CAS Registry Number.