Have you tried Alexa Fluor Plus 405 Phalloidin?
Early feedback: “Tried it twice. Light years better than regular 405 phalloidin. Using it like I use Alexa 568 phalloidin, 488-phalloidin, or 647 phalloidin (6.6nM, 20 minutes in PBS), works great.” The Alexa Fluor Plus 750 is great too.
you could try DY-405 phalloidin. I *think* Dyomics is also synthesizes Dylight dyes. Their own "DY" dyes are pretty similar I guess. And cheaper. I never tried DY-405 phalloidin, but DY-490 phalloidin works just fine in our hands. https://dyomics.com/en/products/blue-excitation/dy-405
Comments
Early feedback: “Tried it twice. Light years better than regular 405 phalloidin. Using it like I use Alexa 568 phalloidin, 488-phalloidin, or 647 phalloidin (6.6nM, 20 minutes in PBS), works great.” The Alexa Fluor Plus 750 is great too.
https://dyomics.com/en/products/blue-excitation/dy-405