PSA：26.3XLogP3：-0.64Appearance：4-butyrolactone is a clear colorless oily liquid with a pleasant odor. (NTP, 1992)Density：1.1284 g/cm3 @ Temp: 16 °CMelting Point：-43.53 °CBoiling Point：204 °C @ Press: 760 TorrFlash Point：209 °FRefractive Index：1.442Water Solubility：Solubility in water: very solubleStorage Conditions：2-8°CVapor Pressure：1.5 mm Hg ( 20 °C)Vapor Density：3 (vs air)Toxicity：Oral-rat LD50: 1540 mg/kg; Oral-Mouse LD50: 1720 mg/kgFlammability characteristics：In case of heat, open flame is flammable; may react with oxidant; thermal decomposition emits toxic and spicy irritating smokeExplosive limit：16%Odor

：Pleasant odor

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