1, mainly used as raw materials for the pharmaceutical industry, for the preparation of aspirin, sodium salicylate, salicylamide, analgesic, salicylate phenyl ester, blood prevention -67 and other drugs. Dye industry is used for the preparation of mordant pure yellow, direct brown 3GN, acid chrome yellow, etc. It is also used as rubber vulcanization retarder and antiseptic. 2, used as epoxy resin curing accelerator, can also be used as a preservative. It can be used to prepare synthetic spices such as methyl salicylate and ethyl salicylate. Dye industry is used as raw materials for the preparation of direct dyes and acid dyes. It can also be used as rubber anti-scorch agent, disinfectant, etc. 3. Standard for alkali and iodine titration. Fluorescent indicator. Complexing indicator. 1. Stable in air. See the light gradually change color. Toxic.
2. Decomposition into phenol and carbon dioxide by rapid heating under atmospheric pressure. 1g of salicylic acid can be dissolved in 460ml water, 15ml boiling water, 2.7ml ethanol, 3ml acetone, 3ml ether, 42ml chloroform, 135ml benzene, 52ml turpentine, about 60ml glycerol and 80ml petroleum ether, respectively. The solubility of salicylic acid in water can be increased by adding sodium phosphate and borax. The pH of salicylic acid solution is 2.4. Salicylic acid and aqueous ferric chloride produce a distinctive purple color.
3. This product stimulates the skin and mucous membrane, and can react with proteins in body tissues, so it has corrosion effect. Can make the cornea proliferate and exfoliate. It is less toxic than phenol, but in large doses can cause vomiting, diarrhea, headache, sweating, rash, shortness of breath, acidosis, and excitement. In severe cases, breathing difficulties, collapse, and eventually heart paralysis and death. Because salicylic acid is excreted from the kidneys, it often causes acute nephritis. Rabbit transoral LD50:1.3mg/kg. Operators should wear labor protection equipment.
4. It exists in flue-cured tobacco leaves, burley tobacco leaves, flavored tobacco leaves and flue gas.
5. There are trace amounts in poplar.
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