Titanium tetrachloride (TiCl₄) is a colorless to light yellow, volatile liquid with a penetrating acidic odor and a molecular weight of 189.68 g/mol. It possesses a melting point of -25°C, a boiling point of 135-136°C at atmospheric pressure, and a density of 1.73 g/mL at 20°C. The compound has a refractive index of 1.61, a dielectric constant of 40.0, critical temperature of 464.8°C, and critical pressure of 46.6 atm. TiCl₄ is extremely moisture-sensitive and reacts vigorously with humid air, producing dense white fumes composed of titanium dioxide and hydrogen chloride. It is soluble in ethanol and functions as a strong Lewis acid.

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