16557-00-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 16557-00-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,6,5,5 and 7 respectively; the second part has 2 digits, 0 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 16557-00:
(7*1)+(6*6)+(5*5)+(4*5)+(3*7)+(2*0)+(1*0)=109
109 % 10 = 9
So 16557-00-9 is a valid CAS Registry Number.