Products Description
p-Cymene (4-isopropyltoluene) is an organic compound with the molecular formula C₁₀H₁₄. It appears as a colorless and transparent liquid with excellent compatibility with various organic solvents. It is insoluble in water but readily soluble in ethanol, ether, acetone, chloroform, and other organic solvents.
Due to its favorable chemical properties, p-cymene is widely used in organic synthesis and serves as an important component in the preparation of paint thinners and other chemical applications.
Chemical Properties
| Melting point | -68 °C |
| Boiling point | 176-178 °C(lit.) |
| density | 0.86 g/mL at 25 °C(lit.) |
| vapor density | 4.62 (vs air) |
| vapor pressure | 1.5 mm Hg ( 20 °C) |
| refractive index | n20/D 1.490(lit.) |
| FEMA | 2356 | P-CYMENE |
| Fp | 117 °F |
| storage temp. | 2-8°C |
| solubility | Chloroform (Sparingly), Ethyl Acetate (Slightly) |
| form | Liquid |
| color | Clear |
| Odor | Mild, pleasant; aromatic, solvent-type. |
| Odor Type | terpenic |
| Odor Threshold | 0.057ppm |
| explosive limit | 0.056 |
| Water Solubility | PRACTICALLY INSOLUBLE |
| Merck | 142763 |
| JECFA Number | 1325 |
| BRN | 1903377 |
| Dielectric constant | 2.3（17℃） |
| Stability: | Stable. Flammable. Incompatible with strong oxidizing agents, strong acids, strong bases. |
| InChIKey | HFPZCAJZSCWRBC-UHFFFAOYSA-N |
| LogP | 4.1-4.8 at 20℃ |
| CAS DataBase Reference | 99-87-6(CAS DataBase Reference) |
| NIST Chemistry Reference | Benzene, 1-methyl-4-(1-methylethyl)-(99-87-6) |
| EPA Substance Registry System | p-Cymene (99-87-6) |
| Hazard Codes | Xi |
| Risk Statements | 10-36/37/38 |
| Safety Statements | 26-36 |
| RIDADR | UN 2046 3/PG 3 |
| WGK Germany | 2 |
| RTECS | GZ5950000 |
| Autoignition Temperature | 817 °F |
| TSCA | Yes |
| HazardClass | 3 |
| PackingGroup | III |
| HS Code | 29029090 |
| Hazardous Substances Data | 99-87-6(Hazardous Substances Data) |
| Toxicity | LD50 orally in rats: 4750 mg/kg (Jenner) |
Product Application
p-Cymene is used as a raw material for the preparation of p-cresol and acetone, and serves as an important intermediate in the production of dyes, pharmaceuticals, and fragrances.
It is naturally present in various essential oils and is also used in related applications due to its expectorant, cough-relieving, and respiratory soothing properties.
