Yamato71 - 26-10-2022 at 17:15
Does anyone here happen to know which optical brightener Tide uses in their dry laundry detergent? I'm looking for a bright blue fluorophore that
reacts in the UVA range.
Sulaiman - 26-10-2022 at 18:49
Maybe https://en.wikipedia.org/wiki/4,4%E2%80%B2-Diamino-2,2%E2%80...
A general list https://en.wikipedia.org/wiki/Fluorophore
Yamato71 - 29-10-2022 at 17:41
I've done the Wikipedia research and have tried several of the blue fluorophores listed. One was workable, but the emission and color purity wasn't
anything as good as plain dry Tide Detergent. I was hoping to straight to whatever compound they use and save a lot of time and money experimenting.
Somebody in here holds the knowledge I seek. I can wait.
[Edited on 30-10-2022 by Yamato71]
Sulaiman - 29-10-2022 at 17:56
The manufacturer knows 
https://tide.com/en-us/our-commitment/ingredients-and-safety...
https://smartlabel.pg.com/00037000849926.html
So the answer is :
https://www.chemicalbook.com/CASEN_16090-02-1.htm
You may be able to get free samples here
https://www.sunwisechem.com/High-Purity-Optical-Brightener-C...
Notice that it white to yellow, the blue must be due to the dye, which may or may not help
PS Flourophores look like interesting target molecules - if I ever get near enough skill.
[Edited on 30-10-2022 by Sulaiman]
Yamato71 - 29-10-2022 at 18:53
That didn't take long. Faith in SM justified.
Thanks!
Dr.Bob - 30-10-2022 at 12:22
That compound would not be as hard to make as it might appear, as symetrical, so first react trichlorotriazine with morpholine, then anline, then with
the central portion. But not trivial either.
Yamato71 - 3-11-2022 at 19:03
I've already got a sample on the way for evaluation. In my younger days I might have given the synthesis a try, but life's getting too short.