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Benzoic acid

Benzoic Acid is a colorless crystalline solid with the chemical formula C7H6O2. Benzoic acid specifications include industrial grade, food grade, feed grade and pharmaceutical grade.

Additional information

Application

Industry, food, feed, medicine

Shelf life

18 months

Storage conditions

Cool and dry place,avoid from direct shining

Product Details:

Benzoic Acid is a colorless crystalline solid with the chemical formula C7H6O2. Benzoic acid specifications include industrial grade, food grade, feed grade and pharmaceutical grade.

Product output: 80,000 tons of industrial-grade benzoic acid, 15,000 tons of food-grade and feed-grade benzoic acid, and 5,000 tons of pharmaceutical-grade benzoic acid. All benzoic acid production is automatically controlled by the DCS system.

Application areas

Industry:

(1) Production of phenol: Benzoic acid can be produced through liquid phase oxidation.

(2) Production of terephthalic acid: Terephthalic acid is one of the raw materials for synthetic fiber polyester. Potassium benzoate undergoes a disproportionation reaction to generate potassium terephthalate and benzene. The reaction mixture is treated with acid to obtain terephthalic acid, and the by-product potassium salt can be recycled. Most of the world’s terephthalic acid is produced from paraxylene, which is much more expensive than toluene.

(3) Production of caprolactam: Caprolactam is a raw material for the production of nylon. It is produced with phenol and cyclohexane, and can also be produced with benzoic acid.

(4) Chemical intermediates: Benzoic acid can be used as an intermediate in the production of benzoate and phthalate, which are important plasticizers.

(5) Plasticizer: Benzoic acid reacts with diethylene glycol, triethylene glycol, and dipropylene glycol to form the important and common resin plasticizers diethylene glycol dibenzoate (DEDB) and triethylene glycol diphenylmethyl respectively. acid ester (TEDB) and dipropylene glycol dibenzoate (DPGDB), which are widely used in the production of resins, coatings and adhesives.

(6) Corrosion inhibitor: Sodium benzoate has a corrosion inhibitor effect. For example, adding sodium benzoate to the cooling water of the automobile cooling system (sodium benzoate concentration is 1.5%) can prevent the cooling system from rusting and corroding. If the cooling device contains cast iron, sodium nitrite needs to be added at the same time to increase the corrosion inhibition effect.

(7) Coatings: Benzoic acid can also be used to improve the gloss, viscosity, strength and chemical resistance of various alkyd resin coatings. Benzoates and benzoic acid can terminate the chain growth of alkyd resin polymers and promote crystallinity of the product.

(8) Dye carrier: Benzoic acid and butyl benzoate are widely used in polyester fiber dyeing. They can be used as dye carriers when dyeing hydrophobic polyester fiber.

(9) Lubricant: Sodium benzoate can be used as a lubricant in metal processing and pharmaceutical production.

Food and medicine:

(1) Preservatives: Benzoic acid and sodium benzoate have bactericidal and inhibitory effects on bacterial growth, and are low-toxic and odorless, so they are widely used as preservatives. In slightly acidic media, benzoic acid at a concentration of only 0.1% can inhibit bacterial growth. Changing the pH value has a great impact on the bactericidal and bacteriostatic effects of benzoate. Its effect is significantly reduced in alkaline media, and the best effect is achieved when the pH value is between 2.5 and 4.5.

In the food industry, benzoic acid and sodium benzoate can be used as preservatives in soy sauce, pickles, cider, juice, feed, etc. In medicines, cosmetics, toothpaste, powder, tobacco leaves, etc., benzene acid and sodium benzoate are also used as preservatives. Sodium benzoate has greater solubility in water and is usually used more often, but its pH value is higher and its bactericidal and bacteriostatic capabilities are much weaker than benzoic acid.

(2) Drugs: Benzoic acid, sodium benzoate, benzyl benzoate, etc. can be used to make various drugs to treat arthritis, abscess, bronchitis, skin diseases, etc., and can also be used as local anesthetics. Benzoic acid can be used to make benzoic acid salicylic acid ointment. Benzoic acid salicylic acid ointment is a medicine made from benzoic acid and salicylic acid as the main raw materials, adding lanolin and yellow petroleum jelly. Among them, the combination of benzoic acid and salicylic acid can treat adult dermatophytes and superficial fungal infections such as tinea corporis, tinea manuum and tinea pedis.

(3) Fixative: Benzoic acid can be used as a fixative for fruit juice drinks. Can be used as an incense stick or as an incense stick. It can also be used in food flavors such as chocolate, lemon, orange, berries, nuts, candied fruits, etc. It is also commonly used in tobacco flavors. Due to the low solubility of benzoic acid, it must be fully stirred when used, or it must be dissolved in a small amount of hot water or ethanol. When used in concentrated fruit juices for refreshing drinks, benzoic acid is easily volatilized with water vapor, so its sodium salt is commonly used.

Specifications

Specification Standard
Assay 99.5-100.5%
Identification To pass test
Congealing range (solidification point) 121-123°C
Water 0.7% max
Residue on ignition 0.05% max
Heavy metals 10 ppm max
Lead 2.0 mg/kg max
Readily carbonizable substances To pass test
Readily oxidizable substances To pass test
Residual solvents To pass test
Particle size 100% thru 100 mesh
Residual solvents Meets requirements

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