Catalogue Number: S6065-SEL
Manufacturer: | Selleck Chemicals |
Molecular Formula: | C32H22N6Na2O6S2 |
Type: | Fluorescent Reagents |
Alias: | Direct Red 28 |
Shipping Condition: | Blue Ice |
Unit(s): | 25 mg |
Congo Red (Direct Red 28) is an indicator dye that is blue-violet at pH 3.0 and red at pH 5.0. It is an acid dye used in testing for hydrochloric acid in gastric contents but has carcinogenic properties.
C1=CC=C2C(=C1)C(=CC(=C2N)N=NC3=CC=C(C=C3)C4=CC=C(C=C4)N=NC5=C(C6=CC=CC=C6C(=C5)S(=O)(=O)[O-])N)S(=O)(=O)[O-].[Na+].[Na+]
3 years -20°C powder