Dorothy Webb asks about amyloid staining with Congo red. Anatech about twelve years announced a product they call Amyloid Red. I've never read about anybody trying it, though. At that time I posted on Histonet that Anatech offers "a product I'd certainly want to look at if I were trying to stain amyloid.
What they have named 'Amyloid Red' they describe as a ureylene (rather than benzidine) based dye, which according to their MSDS is Direct red 72 which is C.I. 29200 and CAS#10114-26-6. It is supposed to replace Congo red in amyloid staining. Amyloid Red colors amyloid, with the same birefringence (polarization) properties as Congo red. Obsolete as a textile dye for many years, benzidine-based Congo red is now listed by OSHA as a carcinogen, and could go out of manufacture. http://www.anatechltdusa.com/ http://my.net-link.net/~anatech/www/anatech/MSDSfolder/AmyloidRedMSDS.html Another question I've asked repeatedly is whether amyloid produced in experimental animals is ever offered as a control material. Has anyone seen this? Bob Richmond Samurai Pathologist Maryville TN _______________________________________________ Histonet mailing list Histonet@lists.utsouthwestern.edu http://lists.utsouthwestern.edu/mailman/listinfo/histonet