172546-49-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 172546-49-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,2,5,4 and 6 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 172546-49:
(8*1)+(7*7)+(6*2)+(5*5)+(4*4)+(3*6)+(2*4)+(1*9)=145
145 % 10 = 5
So 172546-49-5 is a valid CAS Registry Number.
172546-49-5Relevant articles and documents
5,10,15,20-meso-Tetraarylethynylporphirins
Milgrom, Lionel R.,Yahioglu, Gokhan
, p. 9061 - 9064 (2007/10/02)
Examples of the title porphyrins are prepared via Lindsey's method from arylpropynals and pyrrole, and their spectroscopic properties reported.They are green with uv/visible spectra more extensively red-shifted than previously observed for alkynyl-substit
