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Direct Red 28
Chemical Name |
Direct Red 28 |
Synonyms |
C.I.22120;Disodium3,3'-[[1,1'-biphenyl]-4,4'-diylbis(azo)]bis(4-aminonaphthalene-1-sulphonate) |
CAS No. |
573-58-0 |
Molecular formula |
C32H22N6Na2O6S2 |
EINECS No. |
209-358-4 |
Molecular weight |
696.66 |
Molecular Structure |
|
Details |
Appearance: brownish red powder pH change range: 3.0(blue)~5.2(red) Water Soluble Test: pass Loss on drying: 5.0% max. Sulfated ash(as SO4): 27% max. |
Main Application |
Used as pH-indicator, adsorption indicator and biological dye, etc. |
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