Butanethiol Chemical Properties Melting point −116 °C(lit.) Boiling point 98 °C(lit.) density 0.842 g/mL at 25 °C(lit.) vapor density 3.1 (vs air) vapor pressure 83 mm Hg ( 37.7 °C) refractive index n20/D 1.443(lit.) FEMA 3478 | 1-BUTANETHIOL Fp 55 °F storage temp. Flammables area solubility 0.597g/l form Liquid color Colorless