17909-58-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 17909-58-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,7,9,0 and 9 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 17909-58:
(7*1)+(6*7)+(5*9)+(4*0)+(3*9)+(2*5)+(1*8)=139
139 % 10 = 9
So 17909-58-9 is a valid CAS Registry Number.