99558-56-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 99558-56-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,5,5 and 8 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 99558-56:
(7*9)+(6*9)+(5*5)+(4*5)+(3*8)+(2*5)+(1*6)=202
202 % 10 = 2
So 99558-56-2 is a valid CAS Registry Number.