804428-57-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 804428-57-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,0,4,4,2 and 8 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 804428-57:
(8*8)+(7*0)+(6*4)+(5*4)+(4*2)+(3*8)+(2*5)+(1*7)=157
157 % 10 = 7
So 804428-57-7 is a valid CAS Registry Number.