Orthoboric acid is white crystalline powder or colorless scaly or hexagonal triclinic crystal with a little pearly luster. It is soluble in water, alcohol, glycerin, ether and essential oil, no odor. It is extensively used in producing optical glass, acid-resistant glass, organic boron glass and other advanced glasses and glass fibers to improve heat resistance and transparency, improve mechanical strength and shorten the melting time of glass.
| Product name | Orthoboric acid |
|---|---|
| English name | Orthoboric acid |
| Molecular formula | H3BO3 |
| Density | 1.43 |
| Melting point | 169℃ |
| Boiling point | 300℃ |
| Solubility | Soluble in water, alcohol, glycerin, ether and essential oil |
| Appearance and properties | White crystalline powder or colorless scaly or hexagonal triclinic crystal with a little pearly luster |
| CAS RN | 10043-35-3/11113-50-1 |
| EINECS No. | 234-343-4 |
Orthoboric acid is white crystalline powder or colorless scaly or hexagonal triclinic crystal with a little pearly luster. It is soluble in water, alcohol, glycerin, ether and essential oil, no odor. PH of 0.1mol/L aqueous solution is 5.1. 1g of orthoboric acid is soluble in 18ml cold water, 4ml boiling water, 18ml cold ethyl alcohol, 6ml boiling ethyl alcohol and 4ml glycerin. Relative density is 1.4347, melting point is 184℃(breaks down), boiling point is 300℃, half lethal dose (rat, peroal) is 5.14G/kG. It is toxic and irritant.
Glass and glass fiber
In producing optical glass, acid-resistant glass, organic boron glass and other advanced glasses and glass fibers to improve heat resistance and transparency, improve mechanical strength and shorten the melting time of glass.
Enamel and ceramics
In enamel and ceramic industry, orthoboric acid is used in producing glaze to reduce thermal expansion and curing temperature of glaze.
Pharmaceutical industry
In producing orthoboric acid ointment, disinfectant, astringent and preservative.
Flame retardance
The addition of borate in the cellulite material can alter its oxidation reaction.
Metallurgy
As additive and cosolvent in producing boron steel.
Rust protection
Orthoboric acid can be used as antirust agent, lubricant and thermal oxidation stabilizer.
binder
Orthoboric acid is one of the components for producing binders of corrugated paper.
Personal health care products
Pharmaceutical orthoboric acid is used in cosmetics, hygienic products and drugs.
Nuclear industry
It is indipensable in safety and control system of nuclear power station.
Chemical industry
In producing a variety of borates such as sodium borohydride, ammonium hydrogen borate, and potassium borohydride.
Other
Dye stabilizer
Electroplating
Rare metal smelting
Electrolytic condenser
Paint
Foundry casting
Fire-proofing agent of fabrics
Wood preservative
Insecticide
Keep in dry and clean warehouse. Air storage is prohibited to protect from rain and damp. To transport by caravan, cabin or car with shed.
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