What is glacial acetic acid
Acetic acid, also called acetic acid, glacial acetic acid, chemical formula CH3COOH, is an organic monic acid, the main component of vinegar. Pure anhydrous acetic acid (glacial acetic acid) is a colorless hygroscopic solid with a freezing point of 16.6 ° C (62 ° F) and becomes a colorless crystal after solidification. Its aqueous solution is weakly acidic and highly corrosive, and the steam is irritating to the eyes and nose.
Is glacial acetic acid a dangerous chemical
Yes. Acetic acid is flammable and corrosive mono-organic carboxylic acid, which belongs to the second class of organic matter in the control of hazardous chemicals.
The use of glacial acetic acid
Acetic acid can be used as acidity regulator, acidifier, pickling agent, flavor enhancer, fragrance and so on. It is also a good antimicrobial agent, mainly due to its ability to reduce the pH below the pH required for optimal microbial growth. Acetic acid is the earliest and most used sour agent in China. It is mainly used in compound seasoning, preparation of wax, canned food, cheese, jelly and so on. When used in seasonings, acetic acid can be diluted with water to 4%~5% solution and added to a variety of seasonings. The beverage made of vinegar as a sour agent and supplemented by pure natural nutrition and health products is called the international third generation beverage.
Is acetic acid harmful to humans
The harm of acetic acid is related to the concentration of acetic acid solution. Due to the strong pungent odor and corrosive steam, acetic acid with a concentration of more than 25% should be carried out under the eye mask. Dilute acetic acid solutions, such as vinegar, are not harmful. However, ingestion of high concentrations of acetic acid solutions is harmful to human and animal health.
Acetic acid first aid
Skin contact: Wash skin contact with water first, then wash thoroughly with soap.
Eye contact: If the eyes are irritated, wash them with water and wipe them with a dry cloth. In serious cases, send them to the hospital for diagnosis and treatment.
Inhalation: If the vapor is inhaled, the patient should be removed from the contaminated area, placed to rest and keep warm.
Ingestion: Gargle immediately after ingestion, give emetics to induce vomiting, and be sent to hospital for diagnosis and treatment.
Acetic acid extinguishing method
Use mist water, dry powder, anti-alcohol foam, carbon dioxide, extinguishing. Keep the container in the fire cool with water. A mist of water is used to disperse the vapor and drive away the leaking liquid so that the dilution becomes a non-combustible mixture. And spray with water to remove the personnel.
Acetic acid leakage treatment
Pollution emission category: Z
Leakage treatment: cut off the fire source, wear protective glasses, gas masks and acid-resistant work clothes, wash the spill with a lot of water, so that it flows into the channel and is quickly diluted, thereby reducing the harm to the human body.
Acetic acid management
1. Operation management
Closed operation to enhance ventilation. Operators must be specially trained and strictly abide by the operating procedures. It is recommended that operators wear a self-priming filter gas mask (half mask), chemical safety glasses, acid-alkali resistant plastic work clothes, and rubber acid-alkali resistant gloves. Keep away from fire and heat. No smoking in the workplace. Use explosion-proof ventilation systems and equipment. Prevents steam from leaking into the workplace air. Avoid contact with oxidants and alkalis. When handling, light loading and unloading should be done to prevent damage to packaging and containers. Equipped with the corresponding variety and quantity of fire equipment and leakage emergency treatment equipment. Empty containers may have harmful residues.
2. Storage management
Store in a cool, ventilated warehouse. Keep away from fire and heat. During the freezing season, the temperature of the reservoir should be kept above 16℃ to prevent solidification. Keep the container sealed. It should be stored separately from oxidants and alkalis, and should not be mixed. Explosion-proof lighting and ventilation facilities are adopted. Do not use mechanical equipment and tools that are prone to spark. The storage area should be equipped with leak emergency treatment equipment and suitable containment materials.
3. Management of transportation
The time limit for railway transportation of this product is the use of aluminum enterprises to prepare tank cars for shipment, and the approval of relevant departments is required before shipment. Non-canned railway transport should be in strict accordance with the Ministry of Railways "dangerous goods transport Rules" in the dangerous goods packing table. The packing should be complete and the loading should be secure. During transportation, it is necessary to ensure that the container does not leak, collapse, fall or damage. The tank (tank) car used in transportation should have a grounding chain, and a hole partition can be provided in the tank to reduce static electricity generated by shock. It is strictly prohibited to mix or transport with oxidants, alkalis and edible chemicals. Road transport should follow the prescribed route, do not stay in residential areas and densely populated areas.