1. Appearance: Pale yellow to light brown oily liquid or low-melting point crystals (common form in industrial grade; the higher the purity, the lighter the color); 2. Solubility: Insoluble in water, readily soluble in dichloromethane, toluene, tetrahydrofuran, and ethyl acetate, soluble in methanol/ethanol (typical lipophilic characteristics of aryl halides); 3. Stability: Stable under sealed storage at room temperature and protected from light; avoid strong light (iodinated aryl compounds are easily photodegraded), high temperature (≥150℃ easily undergoes dehalogenation), and strong reducing agents (halogen atoms are easily reduced); 4. Boiling point/Melting point: Melting point approximately 35-45℃ (low-melting point crystals), boiling point approximately 380-400℃ (at atmospheric pressure).