172657-05-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 172657-05-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,2,6,5 and 7 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 172657-05:
(8*1)+(7*7)+(6*2)+(5*6)+(4*5)+(3*7)+(2*0)+(1*5)=145
145 % 10 = 5
So 172657-05-5 is a valid CAS Registry Number.
172657-05-5Relevant articles and documents
Synthesis of fluoro- and polyfluoro-veratraldehydes by electrophilic fluorination
Nie, Jun-ying,Kirk, Kenneth L.
, p. 297 - 302 (2007/10/03)
Lithiation of oxazolines derived from fluorinated veratric acid, followed by electrophilic fluorination and subsequent reductive oxazoline cleavage, provides a convenient route to di- and tri-fluoroveratraldehydes.Similarly, 4-fluoroveratrol was converted
