Chemical properties
1. Solubility: It is soluble in polar solvents such as water, alcohol and ether. It has a high solubility in water and can form a stable solution.
2. Oxidizing property: It is a strong oxidant that can oxidize many substances in the presence of oxygen. It can be reduced to hydroquinone quinone (quinone).
3. Condensation reaction: It has the characteristics of condensation reaction and can undergo condensation reaction with certain compounds to form compounds with specific functions.
Uses
1. Hydroquinone is mainly used as a developer for photography. Hydroquinone and its alkylated products are widely used as inhibitors added during the storage and transportation of monomers, and the commonly used concentration is about 200ppm.
2. Used as an antioxidant for rubber and gasoline, etc.
3. In the treatment field, hydroquinone is added to the hot water and cooling water of the closed-loop heating and cooling system to inhibit the corrosion of metals on the water side. Hydroquinone is used as a deoxidizer for boiler water. Hydroquinone is added to the boiler water during preheating and deoxidation to remove residual dissolved oxygen.
4. It is used to manufacture anthraquinone dyes, azo dyes, and pharmaceutical raw materials.
5. It is used as a corrosion inhibitor, stabilizer, and antioxidant for detergents, and is also used in hair dyes for cosmetics.
6. Photometric determination of phosphorus, magnesium, niobium, copper, silicon, and arsenic, etc. Polarographic and volumetric determination of iridium. Reducing agent for heteropoly acids, reducing agent for copper and gold.
Hydroquinone is oxidized from aniline to p-benzoquinone, and then reduced to colorless or white crystalline powder. Hydroquinone is a traditional decolorizing drug that can effectively treat pigmented skin diseases. Although hydroquinone is effective, it has poor stability. In March 1999, a hydroquinone lotion was developed to overcome the disadvantage of hydroquinone cream being difficult to preserve, and its clinical efficacy on chloasma was observed.
