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Isophorone (IP) is a high-boiling-point, low-toxicity, multifunctional alicyclic ketone compound with the mf C₉H₁₄O and mw 138.21. It is a key chemical product derived from acetone through catalytic condensation and cyclization reactions. Its molecular structure contains one carbonyl group (C=O) and one carbon-carbon double bond (C=C), combining the stability of alicyclic compounds with the reactivity of ketones. It also exhibits strong solubility and low volatility. Isophorone exists as two isomers (α-isofuronone and β-isofuronone), with industrial products predominantly containing α-isofuronone (≥95% content). It possesses a distinctive mint-like or camphor-like odor.
| Melting point | -8°C (lit.) |
| Boiling point | 213-214°C (lit.) |
| Density | 0.923 g/mL at 25°C (lit.) |
| Vapor Density | 4.77 (vs air) |
| Vapor Pressure | 0.2 mmHg (20°C) |
| Refractive index | n20/D 1.476 (lit.) |
| Flash point | 84.4±0.0 °C |
| Viscosity | 2.6 mPa・s (at 20°C) |
| Solubility | Slightly soluble in water; miscible with organic solvents such as ethanol, diethyl ether, and acetone. |
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