16561-96-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 16561-96-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,6,5,6 and 1 respectively; the second part has 2 digits, 9 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 16561-96:
(7*1)+(6*6)+(5*5)+(4*6)+(3*1)+(2*9)+(1*6)=119
119 % 10 = 9
So 16561-96-9 is a valid CAS Registry Number.