Substance profile
p-toluenesulphonic acid (containing a maximum of 5 % H2SO4)
p-toluenesulphonic acid (containing a maximum of 5 % H2SO4) is monoclinic leaflets or prisms.
01 · Identification
What p-toluenesulphonic acid… is
p-toluenesulphonic acid (containing a maximum of 5 % H2SO4) is monoclinic leaflets or prisms. It boils at 38 °C, melts at 38 °C.
Under the GHS it carries the signal word Warning. It is classed as corrosives.
Other names for p-toluenesulphonic acid…
- p-toluenesulphonic acid (containing a maximum of 5 % H2SO4)
02 · GHS classification
Hazards and label elements
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
| Code | Hazard statement |
|---|---|
| H335 | May cause respiratory irritation. |
| H315 | Causes skin irritation. |
| H319 | Causes serious eye irritation. |
Precautionary statements: P264, P280, P302, P305, P313, P332, P337, P338, P352
03 · Physical and chemical properties
p-toluenesulphonic acid… properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 38 °C (100.4 °F) | HSDB | |
| 140 °C (284 °F) | at 20 mmHg (reduced pressure) | HSDB | |
| Melting point | 38 °C (100.4 °F) | METASTABLE FORM | HSDB |
| 106 °C (222.8 °F) | monohydrate | HSDB | |
| 105 °C (221 °F) | CAMEO | ||
| Density | 1.24 g/cm³ | ICSC | |
| 1.45 g/cm³ | at 25 °C | CAMEO | |
| Solubility | ABOUT 67 G/100 ML WATER; SOL IN ALCOHOL, ETHER | HSDB | |
| VERY SOL IN WATER | SODIUM SALT | HSDB | |
| Solubility in water, g/100ml at 25 °C: 67 (freely soluble) | at 25 °C | ICSC | |
| Vapor pressure | 0.0000027 mmHg | Haz-Map | |
| Flash point | 183.89 °C (363 °F) | HSDB | |
| 184 °C (363.2 °F) | ICSC |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling p-toluenesulphonic acid…
Incompatible materials
Reacts with water.
Source: Hazardous Substances Data Bank (HSDB)
Planning storage for a mix of chemicals? Check p-toluenesulphonic acid… in the storage compatibility matrix →