1. Standards for alkalimetry and iodometric titration. Fluorescent indicator, complex indicator. 2. This product is used as an anti-scorch agent in the rubber industry and in the production of ultraviolet absorbers and foaming agents. 3. Used as a coordination indicator and masking agent. Color developer and preservative for titanium, zirconium, and tungsten plasma. 4. Salicylic acid is used as an additive in some weakly acidic electrolytes, and can also be used as a complexing agent for electroplating or electroless plating. 5. Cosmetic preservatives. Mainly used in toilet water, prickly heat water, quinine head water and other water cosmetics. In addition to antiseptic and bactericidal effects, it also has the functions of removing sweat and odor, relieving itching and swelling, relieving pain and inflammation. 6. It is mainly used as a raw material in the pharmaceutical industry for the preparation of aspirin, sodium salicylate, salicylamide, analgesics, phenyl salicylate, schistosomiasis-67 and other drugs. In the dye industry, it is used to prepare mordant pure yellow, direct brown 3GN, acid chrome yellow, etc. It is also used as a rubber vulcanization retarder and disinfectant and antiseptic. 7. Used as an accelerator for epoxy resin curing, and also as a preservative. It can be used to prepare synthetic fragrances such as methyl salicylate and ethyl salicylate. The dye industry is used as a raw material for the preparation of direct dyes and acid dyes. It can also be used as rubber antiscorching agent, disinfectant, etc. 8. A small amount is used to formulate animal flavors and other daily flavors. Used in small amounts in food, it acts as a preservative. It is an important raw material for the pharmaceutical industry.