Table 3.
Chemical structures of intermediates of RB 250 for 50 ppm using UV/H2O2 identified by LC/MS analysis.
| Sr. No. | Name of compounds | Structural formula | m/z value | Mol. Wt. | Status |
|---|---|---|---|---|---|
| 1. | sodium 2-((3-amino-4-hydroxyphenyl) sulfonyl) ethylsulphate |
 |
318.33 | 319.29 | Detected |
| 2. | 3-amino-4-methoxyphenol |  |
139.06 | 139.15 | Detected |
| 3. | sodium 2-((3-aminophenyl) sulfonyl) ethylsulphate |
 |
302.33 | 303.29 | Detected |
| 4. | naphthalene-1,3,6-triol |  |
179 | 179.11 | Detected |
| 5. | Naphthalene |  |
130 | 128.17 | Detected |
| 6. | maleic acid |  |
116.92 | 117.09 | Detected |