Description
4-methylbenzenesulfonic acid; Tosylic acid; Tosic acid; PTSA ;
(toluene-4-sulphonic acid)
| CAS | 6192-52-5 |
| Molecular Formula | C7H8O3S.H2O |
| Molecular Weight | 190.22 |
| Shelf Life | 60 Months |
| Physical Properties | |||
| Physical State at 20 °C | Solid | Colour | White crystalline |
| Melting Point/ Freezing Point [°C] | 103 – 106 °C | Flash Point [°C] | 180 °C |
| Boiling Point [°C] | 140 °C | Solubility in Water [% weight] | Soluble in water |
| Specifications | |||
| Appearance | White to pink crystalline flakes or powder | Assay (Alkalimetric) | Min 98.5% |
| Sulphated Ash | Max 0.1% | Sulphate (So4) | Max 0.3% |
| Iron (Fe) | Max 0.01% | Heavy Metal (As Pb) | Max 0.001% |
| Water (By Kf) | 9 – 13% | ||
| Dangerous Goods Information | |||
| UN Number | 2585 | DG Class | 8 |
| Safety Information & Hazard Symbols | |
| Symbol | GHS07 |
| Signal Word | Warning |
| Hazard Statement | H315-H319-H335 |
| Precaution Statement | P261-P305 + P351 + P338 |















