Boric Acid

Boric acid can be used as an antiseptic for minor burns or cuts and is sometimes used in dressings or salves. Boric acid is applied in a very dilute solution as an eye wash.

Send Requirement :


Request a Quote  **Free

No registration, no credit cards required.


Top Brands and Manufacturers

Show All Hide

Manufacturer and Suppliers for Boric Acid


Detailed Description for Boric Acid

Boric acid refers to 3 compounds; orthoboric acid (also called boracic acid, H3BO3 or B2O3·3H2O), metaboric acid (HBO2 or B2O3·H2O), and tetraboric acid (also called pyroboric, H4B4O7 or B2O3·H2O). Orthoboric acid dehydrates to form metaboric acid and tetraboric acid above 170 C and 300C respectively. Orthoboric acid is derived from boric oxide in the form of white, triclinic crystals. It is poorly soluble in cold water but  dissolves readily in hot water, in alcohol and glycerine. Metaboric acid is a white, cubic crystalls. It is soluble in water slightly. Tetraboric acid is a white solid soluble in water. When tetraboric and metaboric acid are dissolved, it reverts to orthoboric acid. 

Boric acid, also called hydrogen borate, boracic acid, orthoboric acid and acidum boricum, is a weak, monobasic Lewis acid of boron 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.

 

Boric acid may be prepared by reacting borax (sodium tetraborate decahydrate) with a mineral acid, such ashydrochloric 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)

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE white cystals
MELTING POINT

170 C

BOILING POINT 300 C
SPECIFIC GRAVITY 1.43 - 1.44
SOLUBILITY IN WATER 4 - 5 g/100 ml at 20 C
pH 5.2 (1% sol.) 
VAPOR DENSITY  

AUTOIGNITION

 

NFPA RATINGS

Health: 2; Flammability: 0; Reactivity: 0

REFRACTIVE INDEX

 

FLASH POINT  
STABILITY Stable under ordinary conditions. Hygroscopic.

 

(H3BO3)≥

98%

99.5%

99.9%

Color

White

White

White

White

White

Appearance

Granular

Powder

Granular

Powder

Powder

Size

2-4 mm

60-80 mesh

2-4 mm

60-80 mesh

60-80 mesh

B (%) ≥

17±0.1

17±0.1

17.5±0.1

17.5±0.1

17.6±0.1

B2O3 (%) ≥

55.2±0.1

55.2±0.1

56.1±0.1

56.1±0.1

56.3±0.1

SO42- (%)≤

0.035

0.0005

0.0002

Cl- (%)≤

0.0018

0.0001

0.0001

Fe (%) ≤

0.0006

0.0002

0.0001

Heavy metals (Pb) % ≤

0.0008

0.0002

0.0001

Water insoluble (%) ≤

0.01

0.005

0.001

The main uses of boric acid is to make borate salts such as borax and other boron compounds. Boric acid is also used in heat resistant glass, in fireproofing fabrics, in electroplating baths, in leather manufacturing, porcelain enamels and in hardening steels. Boric acid has antiseptic and antiviral activity. Aqueous solutions have been used as mouth-washes, eye-drops, skin lotions and cosmetics. Boric acid and its salts are components of many commercial insecticides and wood preservatives.


Question And Answer

Get Prices

Answers to your queries


Buying Tip- See what like buyers had to say!



SUBMIT