p-Cymene
p-Cymene
CAS: 99-87-6
Molecular Formula: C10H14
p-Cymene - Names and Identifiers
| Name | p-Cymene |
| Synonyms | 4-CYMENE p-Cymene Dolcymene lsopropyltoluene 4-Isopropyltoluene 4-ISOPROPYLTOLUENE 4-METHYLISOPROPYLBENZENE 1-isopropyl-4-methyl-benzen 1-methyl-4-(1-methylethyl)benzene 1-methyl-4-(1-methylethyl)-benzen 1-(1-methylethyl)-4-methylbenzene 4-isopropyltoluene neat standard for*epa methods |
| CAS | 99-87-6 |
| EINECS | 202-796-7 |
| InChI | InChI=1/C10H14/c1-8(2)10-6-4-9(3)5-7-10/h4-8H,1-3H3 |
| InChIKey | HFPZCAJZSCWRBC-UHFFFAOYSA-N |
p-Cymene - Physico-chemical Properties
| Molecular Formula | C10H14 |
| Molar Mass | 134.22 |
| Density | 0.86g/mLat 25°C(lit.) |
| Melting Point | -68 °C |
| Boling Point | 176-178°C(lit.) |
| Flash Point | 117°F |
| JECFA Number | 1325 |
| Water Solubility | PRACTICALLY INSOLUBLE |
| Vapor Presure | 1.5 mm Hg ( 20 °C) |
| Vapor Density | 4.62 (vs air) |
| Appearance | Liquid |
| Color | Clear |
| Odor | Mild, pleasant; aromatic, solvent-type. |
| Merck | 14,2763 |
| BRN | 1903377 |
| Storage Condition | 2-8°C |
| Stability | Stable. Flammable. Incompatible with strong oxidizing agents, strong acids, strong bases. |
| Explosive Limit | 5.6% |
| Refractive Index | n20/D 1.490(lit.) |
| Physical and Chemical Properties | Boiling Point: 176 - 178 |
| Use | For the pharmaceutical industry |
p-Cymene - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | R10 - Flammable R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
| UN IDs | UN 2046 3/PG 3 |
| WGK Germany | 2 |
| RTECS | GZ5950000 |
| TSCA | Yes |
| HS Code | 29029090 |
| Hazard Class | 3 |
| Packing Group | III |
| Toxicity | LD50 orally in rats: 4750 mg/kg (Jenner) |
p-Cymene - Reference Information
| FEMA | 2356 | P-CYMENE |
| olfactory Threshold | 0.057ppm |
| LogP | 4.1-4.8 at 20℃ |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| umbrella flower hydrocarbon | umbrella flower hydrocarbon is converted from d-Limonene, after the transformation will become more stable on the umbrella flower hydrocarbon, chemical structure is more stable, because containing benzene ring, the umbrella flower hydrocarbon antibacterial anti-inflammatory effect is more obvious and strong. The characteristics of the umbrella flower hydrocarbon are to relieve bone pain, promote blood circulation, relieve rheumatism, warm joints, maintain joints and so on. The molecular structure of the umbrella flower hydrocarbon is like a sun umbrella supported on the ground, which is larger and better protected than a small umbrella of terpinene. There is a good bactericidal antiviral immune stimulation effect, like a single terpene in the protection of health of the sun umbrella. However, the stimulation of the umbrella flower hydrocarbon is stronger than the limonene, and the direct application will cause the skin to be Fever Red. The essential oil containing the umbrella flower hydrocarbon is recommended to be diluted and applied to avoid burning the skin. Preservation of essential oils containing components of the umbrella flower hydrocarbon need to pay attention to the isolation of air, to avoid oxidation, otherwise the umbrella flower hydrocarbon will continue to be oxidized to more irritating to the skin of the phenol. |
| content analysis | determined by gas chromatography (GT-10-4) using a polar column. |
| toxicity | GRAS(FEMA;FDA,§ 172.515,2000). |
| usage limit | FEMA(mg/kg): Beverage 3.3; Ice cream 5.3; Candy 10.0; Baked goods 7.0; gum 250; Seasoning 10~130. Moderate limits (FDA,§ 172.515,2000). |
| Use | flavorant. used in the pharmaceutical industry used in the preparation of p-cresol, acetone, used as intermediates of dyes, medicines, spices. Isopropyl-p-toluene is found in a variety of essential oils and is itself an expectorant, antitussive and antitussive drug. used in organic synthesis and formulation of paint diluents. It is used as an intermediate for dyes, medicines and fragrances. |
| production method | is obtained from the reaction of camphor and phosphorus pentoxide by removal of nitrate. First, the powdery camphor and phosphorus pentoxide were heated at 176 ° C. For 12h and dehydrogenated to form isopropyl p-toluene. After Acid-base purification and distillation under reduced pressure, a finished product was obtained at a yield of 37%. d-Limonene or dipentene is converted by dehydrogenation. |
| category | flammable liquid |
| toxicity grade | poisoning |
| Acute toxicity | oral-rat LD50: 4750 mg/kg |
| stimulation data | Skin-rabbit 500 mg/24 h moderate |
| explosive hazard characteristics | explosive when mixed with air |
| flammability hazard characteristics | flammable in open flame, high temperature, strong oxidant; combustion emissions |
| storage and transportation characteristics | The package is complete, light, light; The warehouse is ventilated, away from open flame, high temperature, separate from oxidant |
| fire extinguishing agent | foam, carbon dioxide, dry powder, sand |
| Occupational Standard | TWA 25 PPM (140 mg/m3); sel 10 mg/m3 |
| spontaneous combustion temperature | 817 ° F. |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 21:04:16
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