Ammonium Bifluoride

Ammonium (Ammonium) and ammonium hydrogen fluoride (Bifluoride) are widely used.
In the chemical industry, ammonium hydrogen fluoride is often used as an etchant. For example, when etching glass, silica, the main component of glass, and ammonium hydrogen fluoride can chemically react. In this reaction, fluoride ions in ammonium hydrogen fluoride interact with silica to change the microstructure of the glass surface, resulting in precise etching. It is indispensable in the manufacture of glass parts for precision optical instruments and electronic display devices.
Both also have important functions in metal surface treatment. Ammonium salts can adjust the pH of the solution, while ammonium hydrogen fluoride can react with the oxides on the metal surface to remove the oxide layer, making the metal surface clean and active, which is conducive to subsequent electroplating, painting and other processes, enhancing the adhesion between the metal and the coating, and improving the anti-corrosion performance and aesthetics of metal products.
In the agricultural field, ammonium nitrogen fertilizers can provide nitrogen required for plant growth and promote plant stem and leaf growth. Adding specific fertilizers with appropriate amounts of ammonium hydrogen fluoride can improve soil trace element content, help some plants with special needs for fluorine grow, adjust soil pH, and optimize plant growth environment.
In the pharmaceutical industry, ammonium hydrogen fluoride participates in some organic synthesis reactions. As a catalyst or reaction reagent, it helps to build specific chemical structures and synthesize a variety of drug intermediates, which is of great significance to the development and production of innovative drugs.
In summary, ammonium and ammonium hydrogen fluoride have key uses in many fields such as chemical industry, metal processing, agriculture, pharmaceuticals, etc., and have far-reaching impact on industrial production and social development.

Ammonium fluoride (Ammonium Bifluoride) is also a corrosive chemical. When storing, all precautions must not be ignored.
Bear the brunt, and store it in a cool, dry and well-ventilated place. Because it is afraid of moisture, if it is placed in a humid place, it is easy to deteriorate and affect its performance and use. The temperature of the warehouse should be controlled in a suitable area to prevent decomposition and other changes caused by excessive temperature.
Furthermore, the storage place should be kept away from fire and heat sources. Ammonium fluoride hydrogens should be kept away from fire sources when encountering open flames, hot topics, or dangerous, so fire sources should be avoided.
And it is corrosive, and cannot be co-stored with metals, fabrics, wood, etc. Because it can erode metals, cause metal damage; contact with fabrics, wood, etc., can also damage it. It should be stored separately from acids, alkalis, etc., and should not be mixed. Because it can react with acids and alkalis, mixed storage or unexpected.
Packaging is also crucial. Make sure that the packaging is intact and tightly closed. If the packaging is damaged, ammonium fluorohydrogens will escape, which will not only damage its quality, but also endanger the surrounding environment and personal safety.
When handling, be sure to handle it with care to prevent damage to the packaging container. Operators should wear appropriate protective equipment, such as protective clothing, gloves, goggles, etc., to avoid contact with ammonium fluorohydrogens and cause bodily harm.
Daily inspection of storage conditions at regular intervals to see if the packaging is damaged or leaking. If there is any abnormality, take countermeasures quickly to ensure safety. In this way, ammonium fluorohydrogens must be properly stored to avoid disasters.

Ammonium (Ammonium) and ammonium hydrogen fluoride (Bifluoride) are indeed harmful to the human body. Ammonium hydrogen fluoride is highly corrosive, and when touched, it can cause severe pain and burns to the skin. Its appearance is like being burned by fire, the skin is damaged and ulcerated, and even the muscles and bones are damaged, causing long-term injuries. If it enters the eyes, it is particularly harmful, and it can cause severe eye pain, redness and swelling, and even blindness, destroying the ability of people to see and objects.
Its volatile gas is pungent and unpleasant, and if it enters the lungs, it will disturb the way of breathing. Light cases cause cough, sore throat, and chest tightness. In severe cases, it can cause bronchitis and pneumonia, making the lungs blocked, breathing difficult, and damaging the ability of the lungs to clear. If exposed to this gas for a long time, or cause chronic respiratory diseases, lung lobes gradually loss, respiratory function decay.
In addition, accidental ingestion of ammonium hydrofluoride can erode the mouth, throat and stomach. Gastrointestinal pain, such as knife twisting, accompanied by vomiting, diarrhea, and even gastrointestinal perforation, endangering life. Ammonium salts accumulate in the body, which also interfere with the normal metabolism of the human body, mess with the function of the viscera, damage important organs such as liver and kidney, and cause great damage to human health. Therefore, when touching this substance, you must be cautious to protect your health.

Ammonium fluoride (Ammonium Bifluoride), commonly known as acidic ammonium fluoride, is prepared by the following process:
First take an appropriate amount of hydrofluoric acid and place it in a corrosion-resistant container. It is better to use lead dishes because they are resistant to hydrofluoric acid erosion. Slowly add ammonium carbonate, which must be constantly stirred to make the two fully react. The chemical equation of the reaction is: $2HF + (NH_ {4}) _ {2} CO_ {3}\ longrightarrow 2NH_ {4} HF_ {2} + H_ {2} O + CO_ {2}\ uparrow $.
During the reaction, carbon dioxide gas can be seen to escape, which is a sign of the reaction. When the reaction is smooth and there are no obvious bubbles popping up, take a little reaction liquid and measure it with an acid-base test strip. If it is acidic, the reaction is not complete. Ammonium carbonate can be added until the reaction liquid is weakly acidic or neutral.
After the reaction is completed, transfer the resulting mixed liquid into an evaporating dish. Heat in a water bath to evaporate the water slowly. When heating, pay close attention to the changes in the solution, beware of local overheating, causing the product to decompose. When the solution is concentrated until there is crystal precipitation, stop heating and let it cool naturally, and the crystals will gradually precipitate.
The precipitated crystals are filtered through a Brinell funnel to remove the remaining mother solution. The resulting crystals are crude ammonium fluorohydride products. In order to obtain a pure product, the crude product can be dissolved in an appropriate amount of cold water and then recrystallized. The recrystallization operation needs to be repeated several times to obtain high-purity ammonium fluorohydride. Finally, the crystals are placed in a dryer to keep them dry and prevent them from decomposing due to moisture.

Ammonium hydrogen fluoride (Ammonium Bifluoride), at the market median price, often varies according to the purity of the quality, the amount of supply, and the change of time. If you want to find the exact value, it is difficult to determine the number. In the past, its price fluctuated, depending on the situation.
Look at it, the market situation is complicated, and the price range is not the same. Refined and pure, the price is often high; those with slightly inferior quality, the price may be low. And the origin is different, the distance of transportation is near, and the price is also involved. In the past, the record shows that the price per unit quantity may vary from low silver to two.
However, the world changes from time to time, and the business situation changes. If you want to know its price today, you should consult the cities, vendors, or the platforms and newspapers that check the price of chemical products, so that you can get the exact number of the recent time. The price of this chemical is always changed with the supply and demand of the city and the movement of the industry. It cannot be quasi-modern.