204637-84-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 204637-84-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,4,6,3 and 7 respectively; the second part has 2 digits, 8 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 204637-84:
(8*2)+(7*0)+(6*4)+(5*6)+(4*3)+(3*7)+(2*8)+(1*4)=123
123 % 10 = 3
So 204637-84-3 is a valid CAS Registry Number.