Executive standard: Q/YTY002-2011
Chines alias: ;
English alias: Boron
CAS RN: 7440-42-8
1. Physical and chemical properties:
1.1 Elementary symbol: B
1.2 Atomic weight: 10.81(on 1979 international atomic weight)
1.3 Melting point: 2300±2℃
1.4 Sublimation temperature: 2550℃
1.5 Specific gravity: 2.34-2.37
1.6 Solubility: Insoluble in water, ethanol, ethyl ether and
hydrochloric acid, but dissolved in cold concentrated basic
solution and decomposed H2 at the same time. It can be oxidized by
concentrated sulfuric acid or nitric acid to boric acid.
Boron is between metal series with nonmetal series on the periodic
table of elements. As its strong electronegative, small atomic
radius, and centralized nuclear charge, the chemical properties of
it are reactive. It is stable in normal temperature, but it is
oxidized when heated to 300℃and burned if heated to 700℃. It is
tasteless and odorless.
Its nonmetal property is similar to silicon. In high temperature,
boron can react with oxygen, nitrogen, sulfur, halogen or carbon,
etc. It can be combined directly with many sorts of metals to form
boride. Moreover, boron can be also reacted with organic compounds
to synthesize some compounds, in which boron is directly joined to
carbon, or oxygen exists between boron and carbon.
2. Technical indexes:
Total Boron(B) content,%
Water soluble Boron(B) content %
Moisture content, %
H2O2 insoluble, %
Pale brown or brown-black powder
3. Application: Boron has been used mainly in metallurgy, electronics, medicine,
ceramics, nuke industry and chemical industry etc, and it has been
used in the form of compound or as a additive in alloys. It can be
used in smelting of some special alloy steels and as the gas
scavenger for the melting steel, in the ignitor of igniton in the
electric industry, in the control rod of atomic reactor, and as the
high-energy fuels for rocket. It has been as an important material
for manufacturing high-purity of halogenated boron and a raw
material for a variety of borides. A lot of rare noble metals can
be substituted and saved by it. Boron and its compounds can be also
used as the catalyst of some organic chemical reactions, etc.
4. Safety instructions: Toxic by ingestion and inhalation. The central nervous system is
influenced by ingestion, gastrointestinal tract is stimulated by
inhalation and boron poisoning. Eyes bear slight stimulation as
well. Operation must be installed with rubber gloves, a respirator
and eye protection by wearing protective clothing.
5. Packing: Vacuum-packaging. Aluminum foil bag lined with plastic bag, net
weight 1kg per bag.
6. Storage: Stored in a cool, ventilated place. Keep sealed. The shelf life is
12 months after manufacturer date. It is still available if retest
result is qualified after expire date.
7. Transportation: Keep upright when transported, avoid violent collision and
exposure.. Do not mix with strong oxidizer.
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