Congo red, powder
Supplier: MP BIOMEDICALS (FKA ICN BIOMED
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Danger
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Synonyms:
Disodium 3,3'-[[1,1'-biphenyl]-4,4'-diylbis(azo)]bis(4-aminonaphthalene-1-sulfonate)
, Sodium 3,3'-([1,1'-biphenyl]-4,4'-diylbis(diazene-2,1-diyl))bis(4-aminonaphthalene-1-sulphonate)
, Direct Red 28
, Sodium 3,3'-([1,1'-biphenyl]-4,4'-diylbis(diazene-2,1-diyl))bis(4-aminonaphthalene-1-sulfonate)
, Disodium 3,3'-[[1,1'-biphenyl]-4,4'-diylbis(azo)]bis(4-aminonaphthalene-1-sulphonate)
, CI 22120
Congo red is the sodium salt of 3,3'-([1,1'-biphenyl]-4,4'-diyl)bis(4-aminonaphthalene-1-sulfonic acid). It is a secondary diazo dye. It is absorption indicator for halide and thiocyanate determinations.
- UV/Visible Absorbance : λ max (water): 497 ± 3nm
- Presentation : Red Powder
- pH : Visual Transition Interval: From pH 3.0 (blue) to pH 5.2 (red).
- Solubility : Soluble in water,ethanol; very slightly soluble in acetone; practically insoluble in ether; slightly soluble in acetic acid.
Formula:
C₃₂H₂₂N₆Na₂O₆S₂ MW: 696.67 g/mol Melting Pt: >360 °C (lit.) Storage Temperature: Ambient |
MDL Number:
MFCD00004028 CAS Number: 573-58-0 |
Specification Test Results
Identity Test | Passes |
UV/Vis: l max (water) | 497 ± 3nm |
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