204587-83-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 204587-83-7 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, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 204587-83:
(8*2)+(7*0)+(6*4)+(5*5)+(4*8)+(3*7)+(2*8)+(1*3)=137
137 % 10 = 7
So 204587-83-7 is a valid CAS Registry Number.