Acetonitrile, with the CAS number 75 - 05 - 8, is a colorless liquid with a characteristic ether - like odor. It is an organic compound with the chemical formula CH₃CN. The molecular weight of acetonitrile is approximately 41.05 g/mol. It has a boiling point of about 81.6 °C and a melting point of - 45.7 °C. Its density is around 0.786 g/cm³ at 20 °C. This product is supplied directly from the factory, ensuring a good price and high - quality control.
Acetonitrile has a wide range of applications in various industries. In the pharmaceutical industry, it is commonly used as a solvent in the synthesis of many drugs. It can dissolve a variety of organic and inorganic substances, which is crucial for the production of high - purity drugs. For example, it can be used in the extraction and purification of antibiotics and anti - cancer drugs.
In the analytical chemistry field, acetonitrile is a popular mobile phase in high - performance liquid chromatography (HPLC). Its low viscosity and good solubility make it an ideal choice for separating and analyzing different components in a sample. It can also be used in gas chromatography as a solvent for sample preparation.
Acetonitrile is also used in the electronics industry. It can be used to clean electronic components, removing dirt and grease without leaving residues. In addition, it is used in the production of some polymers and plastics, acting as a reaction medium or a modifier to improve the properties of the final products.
When using acetonitrile, it is very important to follow safety procedures. Firstly, it should be stored in a cool, dry, and well - ventilated place, away from heat sources and open flames. Since it is flammable, appropriate fire - prevention measures should be in place.
When handling acetonitrile, personal protective equipment such as gloves, safety goggles, and a lab coat should be worn. In case of contact with skin or eyes, immediately rinse with plenty of water and seek medical attention if necessary. Inhalation of acetonitrile vapors can be harmful, so operations should be carried out in a fume hood to ensure good ventilation.
When using acetonitrile as a solvent in chemical reactions, the appropriate amount should be carefully measured according to the reaction requirements. The reaction conditions such as temperature and pressure should also be strictly controlled to ensure the safety and efficiency of the reaction.
Case 1: Pharmaceutical Drug Synthesis
A pharmaceutical company was synthesizing a new anti - inflammatory drug. They used acetonitrile as a solvent in the reaction process. By dissolving the reactants in acetonitrile, they were able to achieve a more homogeneous reaction environment. The high solubility of acetonitrile allowed for a higher concentration of reactants, which increased the reaction rate. After a series of purification steps using acetonitrile as a solvent again, they obtained a high - purity drug product with a yield of over 80%. This case shows that acetonitrile can significantly improve the efficiency and quality of pharmaceutical synthesis.
Case 2: HPLC Analysis
A research laboratory was analyzing a complex mixture of chemical compounds. They used acetonitrile as the mobile phase in an HPLC system. The low viscosity of acetonitrile allowed for a high flow rate through the column, reducing the analysis time. The good separation ability of acetonitrile enabled them to clearly distinguish different components in the mixture. As a result, they were able to accurately identify and quantify each component, which was crucial for their research project.
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