Chemical Product Library / Reference
p-Toluenesulfonic acid
Chemical identity, technical indicators, performance and application reference. Confirm specifications and regulatory suitability against supplier documentation.
Chemical identity
| English name | p-Toluenesulfonic acid |
|---|---|
| English synonyms | PTSA;p-Toluenesulfonic acid;Tosic acid |
| Chinese name | 对甲苯磺酸 |
| Chinese synonyms | PTSA;对甲苯磺酸一水合物 |
| Chemical category | Fine & Specialty Chemicals |
| CAS No. | 104-15-4 |
| EINECS No. | 203-180-0 |
| Molecular formula | C7H8O3S |
| Molecular weight | 172.2 |
PubChem structure images are reference depictions, not proof of composition, purity, grade, or regulatory status. Mixtures and polymers may not have a single representative structure.
Technical indicators
Assay ≥99.0% (anhydrous) or ≥98.0% (monohydrate); sulfate ≤0.05%; water ≤1.0% (anhydrous); color (Pt-Co) ≤50
Performance characteristics
White crystalline powder or flakes, highly soluble in water, strong organic acid
Application scenarios
Acid catalyst (esterification, dehydration), pharmaceutical intermediate, dye intermediate, coating curing agent