204587-57-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 204587-57-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,4,5,8 and 7 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 204587-57:
(8*2)+(7*0)+(6*4)+(5*5)+(4*8)+(3*7)+(2*5)+(1*7)=135
135 % 10 = 5
So 204587-57-5 is a valid CAS Registry Number.