16172-09-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 16172-09-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,6,1,7 and 2 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 16172-09:
(7*1)+(6*6)+(5*1)+(4*7)+(3*2)+(2*0)+(1*9)=91
91 % 10 = 1
So 16172-09-1 is a valid CAS Registry Number.