| 1 | 4-toluenesulfonic acid |
| 2 | P-tolylsulfonic acid |
| 3 | P-methylphenylsulfonic acid |
| 4 | Toluen-4-sulfonsaeure |
| 5 | P-toluenesulfonic acid |
| 6 | P-toluenesulphonic acid |
| 7 | 4-methylbenzenesulfonic acid |
| 8 | P-methylbenzenesulfonic acid |
| 9 | Tosylic acid |
| 10 | Para-toluene sulfonate |
| 11 | Toluene-4-sulfonate |
| 12 | Tosylate |
| 13 | Tosic acid |