Adipic acid standard substance

Adipic acid is an important organic compound with the chemical formula C6H10O4. Adipic acid is a colorless crystal or crystalline particle that is soluble in water and many organic solvents.
Adipic acid has many important applications. The most common application is as a raw material for nylon 6,6. Nylon 6,6 is a high-performance synthetic fiber widely used in the textile industry, plastic products, automotive components, and electronic devices. Adipic acid is also used as a raw material for synthesizing polyester plastics, such as polyethylene adipate, which can be used to manufacture plastic bottles, plastic films, coatings, and adhesives.
The relevant reference content of adipic acid can be divided into the following aspects:
1. Physical and chemical properties: - The molecular weight of adipic acid is 146.14 g/mol. -The melting point of adipic acid is 152-153 ℃, and the boiling point is 337 ℃. -Adipic acid is soluble in water, with a solubility of 1.5 g/100 mL (20 ℃). -Adipic acid is weakly acidic and can react with bases to form salts.
2. Preparation method of adipic acid: Adipic acid can be obtained by reacting hexene with high concentration nitric acid. The reaction needs to be carried out at low temperature, and the reaction products are succinic acid dinitrate, adipic acid mononitrate, and adipic acid. By controlling the reaction conditions and separation purification process, high-purity adipic acid can be obtained. -Adipic acid can also be obtained by oxidation reaction of n-octanol and oxygen in the presence of lead catalyst. This method has the advantages of environmental protection, high yield, and high selectivity.

3. Analysis method of adipic acid: The content of adipic acid can be determined by high performance liquid chromatography (HPLC). This method has the characteristics of speed, accuracy, and high sensitivity. -The structure of adipic acid can be characterized by nuclear magnetic resonance (NMR) and infrared spectroscopy (IR). NMR can determine the position and quantity of hydrogen atoms in adipic acid molecules, while IR can determine the functional groups and molecular structure of adipic acid.
4. Safety assessment of adipic acid: - Adipic acid has low toxicity and is relatively safe for humans and the environment. However, long-term exposure may cause irritation to the skin and eyes, and appropriate protective measures should be taken. -The combustion of adipic acid produces toxic gases, and contact with strong oxidants and flammable materials should be avoided.
The above is some relevant reference content about adipic acid, which introduces its properties, preparation methods, analysis methods, and safety. Adipic acid, as an important chemical raw material, has broad application prospects in industrial production and scientific research fields.