product description
Chinese name: boric acid
English name: boric acid
Molecular formula: H3BO3
Boron content (B): 17%
Water insolubles: 0.005%
Sulfate (SO4): 0.003%
CAS: 10043-35-3
HS code: 28100020
Boric acid is actually a hydrate of boron oxide (B2O33H2O), which is a white powdery crystal or a three-slanted scaly flaky luster crystal. It has a slippery feel and no odor when it comes into contact with the skin. Soluble in water, alcohol, glycerin, ethers and essential oils, odorless, slightly sweet and bitter after sweet. The exposure is unchanged in the air and can be volatilized with water vapor. When heated to 100-105 ° C, one molecule of water is lost to form metaboric acid; when heated at 104-160 ° C for a long time, it is converted to pyroboric acid, and at a higher temperature, an anhydrate is formed. The boric acid has a pH of 5.1.1 g in a 0.1 mol/L aqueous solution and can be dissolved in 18 ml of cold water, 4 ml of boiling water, 18 ml of cold ethanol, 6 ml of boiling ethanol, and 4 ml of glycerin. Solubility in water increases with the addition of hydrochloric acid, citric acid and tartaric acid. Relative density: 1.4347, melting point 184 ° C (decomposition), boiling point 300 ° C.
Technical Parameters
Test items | Executive Standard: National Standard | Executive Standard: National Standard |
Boric acid (H3BO3) content % | ≥99.9 | ≥99 |
Water insoluble content % | ≤0.005 | ≤0.015 |
Sulfate (SO4) content % | ≤0.003 | ≤0.1 |
Chloride (CL) content % | ≤0.0005 | ≤0.1 |
Iron (Fe) content % | ≤0.0004 | ≤0.005 |
Average granularity | ≥60-80 | ≥60-80 |
Product Usage
1. Preparation of various borate, insecticides for black beetles in cockroaches and carpets.
2. It is used as a hemostatic agent and preservative in medicine, and is used as a pH adjuster, a disinfectant, an antibacterial preservative, and the like.
3.used to prepare borate, boric acid ester, optical glass, paint, pigment, boric acid medicated soap, leather finishing agent, printing and dyeing auxiliaries and pharmaceutical disinfectants.
4. used in capacitor manufacturing and electronic components industry, high-purity analytical reagents, medicinal disinfection and anti-corrosion and preparation of exposed photosensitive materials processing pharmaceutical industry.
5. used in glass, enamel, ceramics, medicine, metallurgy, leather, dyes, pesticides, fertilizers, textiles and other industries.
6. used as a chromatographic reagent, also used in the preparation of buffers.
7. It is widely used in glass (optical glass, acid-resistant glass, heat-resistant glass, glass fiber for insulating materials) industry, which can improve the heat resistance and transparency of glass products, improve mechanical strength and shorten melting time.
8. In the enamel and ceramic industry, it is used to enhance the gloss and fastness of enamel products. It is also one of the ingredients of glaze and pigment.
9. As an additive and cosolvent in the metallurgical industry, especially boron steel has high hardness and good rolling ductility, and can replace nickel copper.
10. boric acid has anti-corrosion, can be used as a preservative, such as: wood anti-corrosion.
11. It is used in the metal welding, leather, photographic and other industries and in the manufacture of dyes, heat-resistant fire-retardant fabrics, artificial gemstones, capacitors and cosmetics.
12. It can be used as a boron fertilizer in agriculture because boric acid contains 17% trace element boron. It is effective for many crops and can improve crop quality and yield.
13. Boric acid can be used as an industrial furnace material.
package
50kg/bag (outer plastic bag outer woven bag)
25kg/bag (kraft paper bag)
Tons of bags (one ton bag)
Storage method
It should be stored in a dry and clean warehouse, and should not be stacked in the open air. Avoid rain or moisture.
It should be transported in a caravan, cabin or covered car. It should not be mixed with wet and colored materials. The vehicle must be dry and clean.
Application method and suggestion of boric acid as boron fertilizer
The application of boron fertilizer is a scientific and technical work. Before applying boron fertilizer, according to soil conditions, the amount of boron needed for different crops, the amount of boron required for different growth stages, the sensitivity of crops to boron, and climatic conditions. The balance between nutrients and the symptoms of boron deficiency in crops are scientifically calculated to ensure proper application of boron fertilizer to avoid boron damage. In addition to the above factors, the application of boron fertilizer should be based on various boron fertilizers. The correct application method, the application method of some boron fertilizer is as follows:
The pure boric acid contains B2O3: 56.3%, then B is: 17.48%; the industrial first grade contains B2O3: 55.7%, then B is: 17.29%.
Boric acid is soluble in water, and the aqueous solution is weakly acidic. The application range and method are the same as those of borax. The difference is that the boron content of boric acid is about 54% higher than that of borax. It should be reduced in the amount or dilution concentration to avoid waste or boron damage. .