820-41-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 820-41-7 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 8,2 and 0 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 820-41:
(5*8)+(4*2)+(3*0)+(2*4)+(1*1)=57
57 % 10 = 7
So 820-41-7 is a valid CAS Registry Number.