TCI C0550 Congo Red (CAS 573-58-0) is a classical direct azo dye offered for research and experimental use. It is widely applied in histology for amyloid staining, in microbiology for screening cellulose-degrading activity on agar plates, and as an acid–base indicator with a clear colour transition in the acidic range. Its well-defined azo structure also makes it a common model dye in adsorption, photocatalysis, and dye-wastewater studies. Handle the powder with gloves and eye protection, and keep the container tightly closed in a cool, dry place away from direct light.
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- Legatowicz-Koprowska et al. (2024). Higher detectability of amyloid with phenol Congo red compared with alkaline Congo red. Rheumatology doi:10.5114/reum/192390
- Normanita (2020). Validity Of Congo Red Agar And Modified Congo Red Agar To Detect Biofilm Of Enterococcus Faecalis. Saintika Medika doi:10.22219/sm.vol16.smumm1.11064
- Patil et al. (2015). Evaluation of the Adsorption Kinetics and Equilibrium for the Potential Removal of Congo Red Dye From Aqueous Medium by Using a Biosorbent. British Journal of Applied Science & Technology doi:10.9734/bjast/2015/12590
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