Reliable Borax Acid Powder H3BO3 ISO9001 Standard 61.83 Molecular Weight

H3BO3 powder orthoboric acid CAS NO 10043-35-3 used in glass LCD

making and enamel galzing

►Product description

Boric acid, also called hydrogen borate, boracic acid, orthoboric acid and

acidum boricum, is a weak, monobasic Lewis acid of boron, which is often

used as an antiseptic, insecticide, flame retardant, neutron absorber, or

precursor to other chemical compounds. It has the chemical formula H3BO3

(sometimes written B(OH)3), and exists in the form of colorless crystals or a

white powder that dissolves in water. When occurring as a mineral, it is called

sassolite.

  ► Occurrence

    Boric acid, or sassolite, is found mainly in its free state in some volcanic

districts, for example, in the Italian region of Tuscany, the Lipari Islands and

the US state of Nevada. In these volcanic settings it issues, mixed with steam,

from fissures in the ground. It is also found as a constituent of many

naturally occurring minerals – borax, boracite, ulexite (boronatrocalcite) and

colemanite. Boric acid and its salts are found in seawater. It is also found in

plants, including almost all fruits.

Boric acid was first prepared by Wilhelm Homberg (1652–1715) from borax,

by the action of mineral acids, and was given the name sal sedativum

Hombergi ("sedative salt of Homberg"). However borates, including boric

acid, have been used since the time of the ancient Greeks for cleaning,

preserving food, and other activities.

►Specification

 ►Preparation

     Boric acid may be prepared by reacting borax (sodium tetraborate

decahydrate) with a mineral acid, such as hydrochloric acid:

Na2B4O7·10H2O + 2 HCl → 4 B(OH)3 [or H3BO3] + 2 NaCl + 5 H2O

It is also formed as a by product of hydrolysis of boron trihalides and

diborane

B2H6 + 6 H2O → 2 B(OH)3 + 6 H2

BX3 + 3 H2O → B(OH)3 + 3 HX (X = Cl, Br, I)

 ►Application

1. Glass making 

2. LCD flat panel displays

3. Enamel glazing