170509-18-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 170509-18-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,0,5,0 and 9 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 170509-18:
(8*1)+(7*7)+(6*0)+(5*5)+(4*0)+(3*9)+(2*1)+(1*8)=119
119 % 10 = 9
So 170509-18-9 is a valid CAS Registry Number.