Boric acid powder Raw Materials CAS 11113-50-1

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Uses and synthesis of Boric acid powder

Boric acid powder is also called "orthoboric acid". It is obtained by the action of natural borax (sodium borate) and acid. Chemical formula H3BO3, molecular weight 61.83, white tridiagonal scales with luster crystals. Relative density 1.43514, refractive index 1.337, 1.461, 1.462.Boric acid CAS 11113-50-1 Soluble in water, ethanol and glycerol.

The aqueous solution is acidic and is a weak monobasic acid (Ka=6×10-10). Solubility in water increases with temperature. Heated to 169 ° C (± 1 ° C) dehydration generated metaborate, 300 ° C into boronic anhydride.Boric acid Raw Materials and strong alkali neutralization to get metaborate. Tetraborate can be obtained under the condition of weak alkali.

1. Preparation: Boric acid powder can be hydrochloric acid or sulfuric acid added to borax solution, or hydrochloric acid decomposition of boronite produced.
2. Uses: Boric acid CAS 11113-50-1 is widely used in the production of borates, water glass, borate, optical glass, enamel, paints, pigments, cosmetics, food preservatives, leather finishing, printing and dyeing auxiliaries and pharmaceuticals, etc., but also as a preservative disinfectant, astringent.

Applications / Functions of Boric acid powder

1. Boric acid powder is widely used in the production of borates, water glass, borate, optical glass, enamel, paint, pigment, cosmetics, food preservatives, leather finishing, printing and dyeing auxiliaries and pharmaceuticals.
2. Boric acid Raw Materials can also be used as antiseptic and disinfectant, astringent.

Physicochemical Property of Boric acid powder

Boric acid Raw Materials is a weak preservative, boric acid aqueous solution is weakly acidic, combined with the amino group in the protein of the bacteria, to play a bacteriostatic effect, and has a weak inhibitory effect on bacteria and fungi.

Small irritation is the biggest characteristic of this product.Boric acid CAS 11113-50-1 can be used as cleansing agent for skin and mucous membrane damages, including acute eczema and acute dermatitis with large amount of ooze, stomatitis and pharyngitis, fungal disease of external ear canal, impetigo, chronic ulcers of calves and bedsores, etc. 3%~5% solution is used for washing wounds, 2% solution is used for rinsing the eyes and oral cavity where there is mucous membrane tissues, 4% solution is used for gargling. 4% solution for gargling is used to treat pharyngitis and stomatitis, 2%~3% boric acid glycerin is used for otitis externa, 4% alcohol solution is used for fungal disease of external ear canal, 10% ointment is used to treat skin abscesses, ulcers and pressure sores.

production methodprocess of Boric acid powder

Boric acid powder can be produced by adding hydrochloric acid or sulfuric acid to borax solution, or by decomposing calcite with hydrochloric acid.

Boric acid CAS 11113-50-1 production method varies with the variety of raw materials. Natural borax, salt lake brine and boron ore are all raw materials for the production of boric acid. In addition to the processing method of acid digestion (sulfuric acid, hydrochloric acid, nitric acid) ore, there are sulfuric acid borax method, carbon and ammonia method, steam distillation method, ion exchange method and flotation method. To Europeanization method, hydrochloric acid method, nitric acid method of processing boromagnesium ore to produce boric acid is also in progress.

Nitric acid method is characterized by low production cost, waste residue calcium nitrate, magnesium nitrate can be comprehensively utilized as ammonium nitrate granulation filler. At present, industrial production is mainly used borax sulfate method and carbon ammonia method. Borax sulfate method is to dissolve borax, plus sulfuric acid decomposition and obtained; carbon and ammonia method is the boron ore powder mixed with ammonium bicarbonate solution, after heating and decomposition of ammonium borate containing material, and then deaminated that is obtained Boric acid Raw Materials.

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