Table 1.
Chemical structures and properties of azo dyes
| Azo dye | Chemical structure | Molecular weight | Water Solubility | Melting point (°C) |
|---|---|---|---|---|
| Orange II |
|
350.32 | Water-soluble (116 g/l) | 164 |
| Sudan III |
|
352.39 | Insoluble | 199 |
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