15561-00-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 15561-00-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,5,5,6 and 1 respectively; the second part has 2 digits, 0 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 15561-00:
(7*1)+(6*5)+(5*5)+(4*6)+(3*1)+(2*0)+(1*0)=89
89 % 10 = 9
So 15561-00-9 is a valid CAS Registry Number.