Products Description

Product name: Salicylic acid
Common names: Ortho-hydroxybenzoic acid, 2-hydroxybenzoic acid
Chemical formula: C7H6O3
Molecular weight: 138.122
CAS number: 69-72-7
EINECS number: 200-712-3
Melting point: 158 to 161 ℃
Boiling point: 336.3 ℃
Density: 1.375 g/cm³
Appearance: White crystalline powder
Flash point: 144.5 ℃

Salicylic acid is an organic acid with the chemical formula C7H6O3. It is a white crystalline powder that is slightly soluble in cold water, easily soluble in hot water, ethanol, ether, and acetone, and soluble in hot benzene. It is mainly used as an important raw material for various fine chemicals such as medicines, fragrances, dyes, pesticides, rubber additives, etc. As the precursor substance of aspirin (acetylsalicylic acid) and a plant hormone, salicylic acid naturally exists in many plants, especially in the bark of willow trees. It is mainly produced by synthesizing from phenol and carbon dioxide, and modern production is achieved by reacting dry phenol sodium (phenol sodium salt) with carbon dioxide, followed by acid treatment.

Item	Standard	Results
Appearance	White needle crystal or white crystalline powder	White needle crystal or white crystalline powder
Dry weight loss	≤ 0.5%	0.43
Content	99.5-101.0%	99.94%
Melting point	158-161℃	158.5℃
Chloride	≤ 100ppm	< 100ppm
Sulfate	≤ 200ppm	< 200ppm
Heavy metals	≤ 20ppm	< 20ppm
Ignition residue	0.1%	0.03%
Appearance of solution	Colorless, transparent liquid	Colorless, transparent liquid
Conclusion	Qualified

Products Application

1. As a standard for titration by the alkali titration method and iodometric titration, a fluorescent indicator, and a complexometric indicator.
2. In the rubber industry, it is used as a defoamer and for the production of ultraviolet absorbers and foaming agents, etc.
3. As a coordination indicator, a coordination masking agent, a color developer for titanium, zirconium, tungsten and other ions, and a preservative.
4. As an additive in certain weakly acidic electrolyte solutions, it can also be used as a complexing agent in electroplating or chemical plating.
5. As a cosmetic preservative, mainly used in water-based cosmetics such as cologne water, pruritus water, quinine water, etc. Besides its antibacterial and antiseptic effects, it also has functions such as eliminating body odor, relieving itching and swelling, and relieving pain and inflammation.
6. As a raw material in the pharmaceutical industry, it is used to prepare aspirin, sodium salicylate, salicylamide, analgesic, salicylic benzyl ester, blood prevention-67, etc. 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 retardant and disinfectant preservative, etc.
7. As a catalyst for the curing of epoxy resins, it can also be used as a preservative. It can also be used to prepare synthetic fragrances such as methyl salicylate and ethyl salicylate. It can also be used in the dye industry as a raw material for preparing direct dyes and acid dyes, and can also be used as a rubber defoamer, disinfectant, etc.
8. A small amount is used to prepare animal fragrance essences and daily fragrance essences, and a trace amount is used in food, serving as a preservative.