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7440-42-8
B
0502CY
99.9999%
-4+40mesh
231-151-2
Class 4.1
UN3178
PG III
Characteristic
Boron is a chemical element with the symbol B and atomic number 5. Boron has two allotropes: crystalline boron is a glossy gray crystal that is nearly as hard as diamond but extremely brittle;The other boron is a dark brown powder.
Phase at STP：solid
Appearance：black-brown
Melting point：2349 K (2076 °C, 3769 °F)
Boiling point：4200 K (3927 °C, 7101 °F)
Density when liquid (at m.p.)：2.08 g/cm3
Heat of fusion：50.2 kJ/mol
Heat of vaporization：508 kJ/mol
Molar heat capacity：11.087 J/(mol·K)
Application
Mainly used in the production of borax, boric acid and boron compounds and the element boron, is metallurgy, building materials, machinery, electrical appliances, chemical industry, light wool, nuclear industry, medicine, agriculture and other important raw materials.
Characteristic
Boron is a chemical element with the symbol B and atomic number 5. Boron has two allotropes: crystalline boron is a glossy gray crystal that is nearly as hard as diamond but extremely brittle;The other boron is a dark brown powder.
Phase at STP：solid
Appearance：black-brown
Melting point：2349 K (2076 °C, 3769 °F)
Boiling point：4200 K (3927 °C, 7101 °F)
Density when liquid (at m.p.)：2.08 g/cm3
Heat of fusion：50.2 kJ/mol
Heat of vaporization：508 kJ/mol
Molar heat capacity：11.087 J/(mol·K)
Application
Mainly used in the production of borax, boric acid and boron compounds and the element boron, is metallurgy, building materials, machinery, electrical appliances, chemical industry, light wool, nuclear industry, medicine, agriculture and other important raw materials.
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