Congo Red Ph

Congo Red Ph. Congo red “Congo red” is not the name of a famous African explorer but a dye that dates to 1883 It was synthesized by P Böttiger as a textile dye but it subsequently became more important as a pH indicator It colors aqueous solutions blue below pH 30 and becomes red above pH 50 Recently I A Buhimschi and coworkers at Nationwide Children’s Hospital.

Congo Red (Direct Red 28) is an indicator dye that is blueviolet at pH 30 and red at pH 50 It is an acid dye used in testing for hydrochloric acid in gastric contents but has carcinogenic properties CAS No 573580 Purity & Quality Control Finest quality approved by Nature Medicine SDS Datasheet Biological Activity Description.

Adsorption of an anionic dye (Congo red) from aqueous

Congo red 1naphthalenesulfonic acid33´ (44´biphenylene bis (azo)) bis (4amino) disodium salt is a benzidinebased anionic diazo dye In the aqueous solution this anionic diazo dye dissolves and ionizes out an anion of sulfonate group (for short CRSO3−) as shown in Eq (2721) Figure 2713.

Congo red C32H22N6Na2O6S2 PubChem

Congo red (CR) (Direct Red 28 CI 22120 azo dye C 32 H 22 N 6 Na 2 O 6 S 2 molecular weight 6967) was selected as anionic dye The pH was adjusted with 01 M NaOH or 01 M HCl solutions All.

Congo red American Chemical Society

Congo Red Test Paper [Vial of 100 Strips] for Qualitative NarrowRange pH 30 to 52 Tests Amazonca Industrial & Scientific.