Propanoic acid, also known as oleic acid, is a three-carbon carboxylic acid, short-chain saturated fatty acid, and its chemical formula is CH3CH2COOH. Pure propionic acid is a colorless, corrosive liquid with a pungent odor.
Propionic acid is mainly used as a food preservative and antifungal agent. It can also be used as an inhibitor of medium viscous substances such as beer, a nitrocellulose solvent and a plasticizer. It can also be used for the preparation of nickel plating solutions, the preparation of food spices and medicines. , Pesticides, antifungal agents, etc.
Nature and stability
1. Chemical properties: It has the chemical properties of general carboxylic acids and can form compounds such as acid chlorides, acid anhydrides, esters, amides, nitriles, etc. The α-hydrogen atom is easily replaced by halogen under the catalysis of phosphorus trichloride to generate α-halopropionic acid.
2. Propionic acid is a flammable liquid, low toxicity, irritating to mucous membranes, and bactericidal. When the skin is contaminated with propionic acid, rinse with plenty of water. The oral LD50 of mice is 3.5~4.3g/kg, and the maximum allowable concentration in the air is 150mg/m3.
3. Belong to low toxicity category. It is less toxic than formic acid and has a irritating effect on eyes, skin and mucous membranes. It has the same bactericidal properties as acetic acid and can inhibit the growth of bacteria. In a 5%~7% solution, the bacteria will be completely killed in 15 minutes. Rinse immediately with water when in contact with skin. In case of fire, use foam extinguishing agent, powder extinguishing agent or carbon dioxide to extinguish the fire. The olfactory threshold concentration is 0.053mg/m3.
4. Stability: stable
5. Incompatible materials: alkalis, strong oxidants, strong reducing agents
6. Polymerization hazards: no polymerization  
Storage method
Storage precautions: Store in a cool, ventilated warehouse. Keep away from fire and heat sources. The storage temperature does not exceed 32℃, and the relative humidity does not exceed 80%. Keep the container tightly closed. It should be stored separately from oxidants, reducing agents, and alkalis, and avoid mixed storage. Use explosion-proof lighting and ventilation facilities. It is forbidden to use mechanical equipment and tools that are prone to sparks. The storage area should be equipped with leakage emergency treatment equipment and suitable storage materials.
Notes
Health hazards: Inhalation of this product has a strong irritation to the respiratory tract, and pulmonary edema may occur. The vapor is irritating to the eyes, and the liquid can cause serious eye damage. Skin contact can cause burns. Nausea, vomiting and abdominal pain occurred after taking a large amount of oral administration. Causes of autism.
Environmental hazards: Hazardous to the environment and may cause pollution to water bodies.
Fire and explosion hazard: This product is flammable, corrosive, and highly irritating, which can cause burns to the human body.
Storage and transportation characteristics
[Operation precautions] Airtight operation, strengthen ventilation. Operators must undergo special training and strictly abide by the operating procedures. It is recommended that operators wear self-priming filter gas masks (half masks), chemical safety glasses, acid and alkali-proof overalls, and rubber acid and alkali-resistant gloves. Keep away from fire and heat sources, and smoking is strictly prohibited in the workplace. Use explosion-proof ventilation systems and equipment. Prevent the vapor from leaking into the air in the workplace. Avoid contact with oxidants, reducing agents and alkalis. When handling, load and unload with care to prevent damage to packaging and containers. Equipped with corresponding types and quantities of fire-fighting equipment and leakage emergency treatment equipment. Empty containers may be harmful residues.
【Storage Precautions】Store in a cool, ventilated warehouse. Keep away from fire and heat sources. The storage temperature should not exceed 30°C. Keep the container tightly closed. It should be stored separately from oxidants, reducing agents, and alkalis, and avoid mixed storage. Use explosion-proof lighting and ventilation facilities. It is forbidden to use mechanical equipment and tools that are prone to sparks. The storage area should be equipped with leakage emergency treatment equipment and suitable storage materials.
Use
Determination of aromatic diamines. Gas chromatographic analysis standard. Esterifying agent. Manufacturing propionic acid compounds. Emulsifier. Nickel plating solution. Food spices.
Main use: Used as esterification agent, nitrocellulose solvent, plasticizer, chemical reagent and food preparation raw materials, etc.
Mainly used as food preservatives and antifungal agents. It can also be used as an inhibitor of medium viscous substances such as beer. Used as nitrocellulose solvent and plasticizer. It is also used for the preparation of nickel plating solution, the preparation of food spices, and the manufacture of medicines, pesticides, and antifungal agents.