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P Cymene (MF: C4H14, MW: 134.22) is a colorless to pale yellow transparent liquid with a characteristic aromatic odor; it belongs to the alkylbenzene class of compounds. It is practically insoluble in water but readily soluble in most organic solvents such as ethanol, diethyl ether, acetone, and chloroform. Chemically stable, it is an important fine chemical product used as an organic synthesis intermediate, fragrance raw material, pharmaceutical intermediate, and solvent and diluent. It occurs naturally in various essential oils and possesses medicinal properties such as expectorant and cough-suppressing effects.
| Item | Specification |
| Melting Point | -68°C |
| Boiling Point | 176–178°C |
| Density | 0.86 g/mL at 20°C |
| Flash point | 117°F (47.2°C) |
| Vapor pressure | 1.5 mmHg at 20°C |
| Refractive index | n 20/D 1.490 |
| Solubility | Solubility in water at 20°C is approximately 0.034%; readily soluble in most organic solvents. |
| Stability | Stable at room temperature; may discolor with prolonged storage; non-corrosive to metals. |
Organic Synthesis: A key intermediate used in reactions such as oxidation, halogenation, and sulfonation to produce fine chemicals including phenols, aldehydes, ketones, and aromatic acids.
Pharmaceutical Applications: Possesses inherent antitussive, expectorant, and bronchodilatory properties; also used as a raw material for synthesizing antimicrobial agents, local anesthetics, and other pharmaceuticals.
Fragrances and Flavors: P Cymene is used as compliant food-grade and personal care fragrances to create scents in foods, cosmetics, and personal care products.
Industrial Applications: 4 Isopropyltoluene is used as a solvent and diluent for coatings and resins; also serves as a rubber processing aid and a standard substance for gas chromatography.
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