Borates in chemistry are chemical
compounds containing boron bonded to three oxygen atoms written as B(OR)3.
In B(OR)4- anions, this number increases to four.
The borate ion is BO33-. it forms salts with
metallic elements. Boron found in nature is commonly as a borate mineral.
Boron is also found combined with silicate to form complex borosilicate
minerals such as the tourmalines.
Borate exists in many forms. In acid and near-neutral conditions, it is
boric acid, commonly written as H3BO3 but more
correctly B(OH)3. The pKa of boric acid is 9.14 at 25C. Boric
acid does not dissociate in aqueous solution, but is acidic due to its
interaction with water molecules, forming tetrahydroxyborate:





Lithium
borate can be used in the laboratory as buffer for gel
electrophoresis of DNA and RNA. It has a lower conductivity, produces
crisper resolution, and can be run at higher speeds than can gels made
from TBE or TAE (5-50V/cm as compared to 5-10V/cm). At a given voltage,
the heat generation and thus the gel temperature is much lower than with
TBE/TAE buffers, therefore the voltage can be increased to speed up
electrophoresis so that a gel run takes only a fraction of the usual
time. Downstream applications, such as isolation of DNA from a gel slice
or Southern blot analysis, work as expected with lithium boric acid
gels. Lithium borate is also an ingredient for use in making glasses and
ceramics.
Borax
(from Persian burah[1][2]), also called sodium borate, or sodium
tetraborate, or disodium tetraborate, is an important boron compound, a
mineral, and a salt of boric acid. It is usually a white powder
consisting of soft colorless crystals that dissolve easily in water.