804557-84-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 804557-84-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,0,4,5,5 and 7 respectively; the second part has 2 digits, 8 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 804557-84:
(8*8)+(7*0)+(6*4)+(5*5)+(4*5)+(3*7)+(2*8)+(1*4)=174
174 % 10 = 4
So 804557-84-4 is a valid CAS Registry Number.