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PRODUCTS >INDUSTRIAL CHEMICALS > INORGANIC CHEMICALS >

BORIC ACID

PRODUCT IDENTIFICATION

CAS NO. 10043-35-3

BORIC ACID

EINECS NO. 233-139-2
FORMULA B2O3·3H2O
MOL WT. 61.83

H.S. CODE

2810.00
TOXICITY Oral rat LD50: 2660 mg/kg
SYNONYMS Boracic Acid, Hydrogen Borate, Orthoboric Acid;
Boracic acid; Hydrogen orthoborate; Trihydroxyborane;
DERIVATION  

CLASSIFICATION

 

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE white cystals
MELTING POINT

170 C

BOLING POINT 300 C
SPECIFIC GRAVITY 1.43 - 1.44
SOLUBILITY IN WATER 4 - 5 g/100 ml at 20 C
pH  
VAPOR DENSITY  

AUTOIGNITION

 

NFPA RATINGS

Health: 1; Flammability: 0; Reactivity: 0

REFRACTIVE INDEX

 

FLASH POINT  
STABILITY Stable under ordinary conditions. Hygroscopic.

GENERAL DESCRIPTION AND APPLICATIONS

Bric acids 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 at cold temperature 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. 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 manufacturibg, 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.
SALES SPECIFICATION

APPEARANCE

white cystals

BH3O3

99.0% min

PHOSPHATES

0.001% max

SULFATES

0.005% max

INSOLUBLES IN METHANOL 0.005%

Ca

50ppm max

Cl

10ppm max

As

1ppm max

HEAVY METALS (as Pb)

10ppm max

TRANSPORTATION

PACKING  
HAZARD CLASS  
UN NO.  
OTHER INFORMATION

 

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