Table 2 Experimental data of the elemental analysis of PAP azo dyes (Ia and Ib)
Azo dye | Molecular weight | Colour | M.P | Elemental analysis Calculated Found | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
C% | H% | N% | S% | C% | H% | N% | S% | ||||
Ia | 394.346 | Bright red | \(>\) 350 \(^\circ{\rm C}\) | 57.82 | 3.58 | 14.21 | 8.13 | 57.67 | 3.61 | 14.17 | 8.15 |
Ib | 280.22 | Orange | 198 \(^\circ{\rm C}\) | 64.29 | 4.32 | 19.99 | – | 64.24 | 4.37 | 20.4 | – |