Boron and boron compounds — properties & hazards overview
Melting point
2076 °C
Boiling point
3927 °C
Solubility
Insoluble (elemental); borates soluble
Dust explosivity
Possible (fine powder)
Toxicity
low–moderate
Flammability
dust only
Chronic risk
reproductive (borates)
Environmental
aquatic toxicity
| Property | Value / Note |
|---|---|
| Form | Dark amorphous or crystalline solid; fine powders are reactive |
| Molar mass | 10.81 g/mol |
| Density | 2.34 g/cm³ |
| Reactivity | Stable; reacts with oxidisers at high temperatures forming boron oxides |
| Common compounds | Boron trioxide (B₂O₃), boric acid (H₃BO₃), borates (Na₂B₄O₇·10H₂O) |
| Water solubility | Borates moderately soluble; boric acid 47 g/L @ 20 °C |
| Typical uses | Glass, ceramics, detergents, flame retardants, semiconductor industry |
*Values are indicative; verify via SDS and current process data.