Salicylic acid molecular formula? Salicylic acid molecular weight

Molecular formula: 2-HOC6H4COOH. Also known as o-hydroxybenzoic acid. Free salicylic acid is present in plants only in small amounts; Methyl salicylate is abundant in many vegetable oils, for example, in wintergreen oil, methyl salicylate is above 90. Colorless crystals.

Melting point 159, sublimation at 211 (20 mm Hg), relative density. Soluble in ethanol, ether, slightly soluble in water. Salicylic acid has the properties of both aromatic acid and phenol, and reacts with sodium hydroxide, and both carboxyl and hydroxyl groups are neutralized to form a double sodium salt; In the interaction with sodium carbonate, since the phenolic hydroxyl group is less acidic than that of carbonic acid, only the carboxyl group is neutralized into sodium salt.

Salicylic acid reacts with ferric chloride aqueous solution in blue-purple color, so iron and water containing iron salts cannot be used in the preparation of salicylic acid.

Salicylic acid is industrially prepared by reacting sodium phenol with carbon dioxide at a pressure of 5 6 atmospheres at 120 170. It can also be prepared by oxidation of salicylylol or salicylaldehyde, or by saponification of methyl salicylate in wintergreen oil. The latter two methods are too costly and have limited yields.

Salicylic acid is mainly used to make acetylsalicylic acid, which is a commonly used antipyretic and painkiller called aspirin. Salicylic acid is a topical bactericidal disinfectant, which can also be used as a rubber antioxidant and used in the manufacture of dyes. Methyl salicylate can be used as an edible flavor, preservative and external rubbing medicine for rheumatic pain.

Phenyl salicylate, also known as saro, is a urethral disinfectant and a stabilizer for polyethylene plastics. Sodium salicylate is a drug for rheumatism; Lead salts can be used in paints, as a stabilizer for polyethylene and as a UV absorber.

This is the salicylic acid formula 2-hoC6H4COOH. Chemically called o-hydroxybenzoic acid.

Salicylic acid molecular weight

Salicylic acid is a chemical substance, molecular formula: C7H6O3, color: light pink to light brown with crystalline or light crystalline powder, use: disinfection and antiseptic, has the effect of dissolving ** keratin.

Salicylic acid is easily soluble in ethanol, ether, chloroform, benzene, acetone, turpentine, insoluble in water, and solubility is grams per 100 ml at 20 °C. Shade and seal for preservation. Found in the bark of willow trees, white-beaded leaves and sweet birch trees.

Salicylic acid is an organic acid that can be obtained by the metabolism of salicylin. It is widely used in organic synthesis and is also a plant hormone.

The salicylic acid structure formula is Ho-C6H4-COOH. Among them, phenolic hydroxy-OH and carboxy-COOH are in the ortho position, so they are called "o-hydroxybenzoic acid".

Stable at room temperature. Rapid pyrolysis into phenol and carbon dioxide. It has the general properties of some acid rushing rocks.

Phenol sodium salt solution is made with phenol and liquid caustic soda, vacuum dried, and then the dry carbon dioxide is slowly introduced at 100 times, and when the pressure is reached, the carbon dioxide is stopped, and the temperature is raised to 140 180. After the reaction is completed, clean water is added to dissolve the sodium salicylate salt, and then decolorization and filtration, and then sulfuric acid acidification is added, that is, salicylic acid is precipitated, and the finished product is obtained after filtration, washing and drying.

The chemical formula of salicylic acid is Ch O.

Salicylic acid, is an organic acid, the chemical formula is C7H6O3, is a white crystalline powder, slightly soluble in cold water, soluble in hot water, ethanol, ether and acetone, soluble in hot benzene, mainly used as an important raw material for fine chemicals such as medicine, spices, dyes, pesticides, rubber additives, etc.

The uses of salicylic acid are as follows:

1. It is used as a standard, fluorescent indicator and complexation indicator for alkaline and iodine titration.

2. In the rubber industry, it is used as an anti-scorching agent and the production of ultraviolet absorber and foaming agent.

3. It is used as a chromogenic agent and preservative for indicators and masking agents, titanium, zirconium, tungsten and other disrupted ions.

4. It can be used as an additive in some weakly acidic electrolytes, and can also be used as a complexing agent for electroplating or electroless plating.

5. It is used as a cosmetic preservative, mainly used for water cosmetics such as toilet water, prickly heat, quinine head water, etc. In addition to antiseptic and sterilization effects, it also has the functions of removing sweat odor, relieving itching and swelling, relieving pain and inflammation.

6. It is used as a raw material in the pharmaceutical industry for the preparation of aspirin, sodium salicylate, salicylamide, analgesic, phenyl salicylate, hemo-67 and other drugs. The dye industry is used to prepare mordant pure yellow, direct brown 3gn, acid chromium yellow, etc. It is also used as a rubber vulcanization retardant and disinfection preservative.

7. It can be used as an accelerator for the curing of epoxy resin, as a preservative, as a synthetic fragrance such as methyl salicylate and ethyl salicylate, and as a raw material for the preparation of direct dyes and acid dyes in the dye industry, as well as as a rubber anti-scorching agent and disinfectant.

8.A small amount is used for the preparation of animal flavor and other daily flavors, and a small amount is used in food to play the role of preservative.