Density 1.4± 0.1g /cm3 Melting point 170.9ºC Molecular formula BH3O3 Molecular weight 61.833 Precise mass 62.017525 PSA 60.69000 LogP minus 0.29 Appearance Liquid Refractive index 1.385 stability Boric acid is toxic to the human body, which affects the nervous center, upper respiratory tract, digestive organs and liver, etc., and leads to death in severe cases. Molecular structure 1, molar refractive index: 10.08 2, molar volume (cm3/mol) : 43.0 3. Isotropic specific volume (90.2K) : 119.2 4, surface tension (dyne/cm) : 59.1 5. Polarizability (10-24cm3) : 3.99 more 1. Properties: It is actually a hydrate of boron oxide, which is a white powder or a scaly crystal with gloss on the triclinic axial surface. Smooth feel, no smell. 2. Relative density (15â??) : 1.435 3.. Solubility: Soluble in water, alcohol, glycerin, ethers and essential oils. The solubility in water increases with the increase of temperature, and can be volatilized with water vapor. The solubility in water increases with the addition of hydrochloric acid, citric acid and tartaric acid.