2558-87-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2558-87-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,5,5 and 8 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 2558-87:
(6*2)+(5*5)+(4*5)+(3*8)+(2*8)+(1*7)=104
104 % 10 = 4
So 2558-87-4 is a valid CAS Registry Number.