Anhydrous citric acid, chemical formula C6H8O7, is a colorless crystalline solid. It is a white crystalline powder made under mild conditions (usually mild heat and pressure), soluble in water, and acidic.
1. Food additives: Anhydrous citric acid is often used in food processing as an acidity regulator, which can enhance the acidity of food and improve the taste.
2. Pharmaceuticals: In the pharmaceutical industry, anhydrous citric acid is widely used in drug preparations and pharmaceutical production processes.
3. Cosmetics: Due to its antioxidant properties, anhydrous citric acid is also used in cosmetics and personal care products.
Introduction to the synthesis route
Anhydrous citric acid is mainly synthesized by fermentation and oxidation of sucrose or glucose. First, sucrose or glucose is converted into citric acid, dehydrated under appropriate conditions, and anhydrous citric acid crystals are obtained.
Avoid inhalation: Avoid inhaling anhydrous citric acid powder during use to prevent damage to the respiratory system.
Avoid contact with skin and eyes: Anhydrous citric acid is corrosive to a certain extent. Avoid direct contact with skin and eyes when using it. If accidentally contacted, rinse with plenty of water immediately and seek medical attention.
Transportation: During transportation, avoid violent vibration and packaging damage as much as possible to prevent leakage. Labeling and packaging must be carried out in accordance with relevant regulations.
Storage: Anhydrous citric acid should be stored in a dry, well-ventilated place, away from fire and high temperature. At the same time, it should be kept away from flammable materials and oxidants. The storage period should generally not exceed two years.
Through the above introduction, we understand the basic properties, main uses, synthesis routes, precautions for use, and relevant information on transportation and storage of anhydrous citric acid. When using and handling, it must be strictly followed in accordance with relevant safety operating procedures to ensure the safety of people and the environment.
