Ammonium Silicofluoride

Ammonium fluorosilicate has a wide range of uses. In the field of industry, it is often used as a preservative to protect metal equipment from corrosion, just like putting a layer of strong armor on the utensils to block external erosion. It can also be used as a protective agent for wood, penetrating into the wood body, making it difficult for borers to attack, keeping wood long-lasting, such as casting a defensive shield for wood.
In agriculture, ammonium fluorosilicate can be used as an insecticide, applied to the field, has the effect of repelling pests, and keeps crops thriving, just like a field guard, guarding the health of crops. It can also be used as a soil improver to adjust soil pH and increase soil fertility, such as injecting vitality into the land, making crop roots more stable and absorbing nutrients.
In the glass manufacturing industry, this agent can be used as a flux to lower the melting point of glass, save energy consumption, and make glass forming smoother, just like laying a smooth road for glass manufacturing to help it present perfectly. In ceramic production, it can increase the luster and hardness of ceramics, improve the quality of ceramics, and add luster and toughness to ceramics, making them transform and sublimate in the kiln fire. In short, ammonium fluorosilicate has indispensable functions in many fields, silently helping various industries to move forward.

Ammonium fluorosilicate (Ammonium Silicofluoride) has unique physical properties. At room temperature, this substance is mostly in the state of white crystalline powder, with a fine texture and looks like fine snow. Its color is pure and white, without noise.
In terms of its density, it is slightly heavier than ordinary light powders, and it feels slightly sinking. The particles are fine, and when touched, it seems to feel smooth, but it does not lose dryness and does not stick to the fingertips.
Ammonium fluorosilicate has certain dissolution properties in water. When placed in water, the powder can be seen slowly diffusing and gradually integrating into the water body. However, its dissolution is not rapid and complete. In water at room temperature, the dissolution rate is moderate. After the solution is clarified, a slight luster can be seen, like a tulle covering the water surface.
Furthermore, its melting point is worth mentioning. During the heating process, when the temperature rises to a specific value, ammonium fluorosilicate begins to melt. The temperature of the melting point makes it possible to precisely control the time and state of participating in the reaction in many industrial processes and chemical reactions.
In addition, the stability of ammonium fluorosilicate is also its significant physical property. Under normal environmental conditions, it is not easy to react easily with common substances around it, and it can maintain the stability of its own chemical composition and physical form for a long time. It is like a calm old man who is still in the environment and is not easily moved by the outside world. This stability provides a lot of convenience and reliability in various storage and use scenarios.

Ammonium fluorosilicate (Ammonium Silicofluoride) has unique chemical properties and is also important in ancient chemical studies. This substance is hydrolytic and can interact with water when placed in water. When it is hydrolyzed, ammonium ions ($NH_ {4 }^{+}$） combine with hydroxide ions in water, and fluorosilicate ions ($SiF_ {6} ^ {2 -} $) also react with hydrogen ions, making the solution acidic.
When ammonium fluorosilicate is heated, it is prone to decomposition. During its decomposition process, many products are formed, such as ammonia ($NH_ {3} $), hydrogen fluoride ($HF $) and other substances. This decomposition reaction requires a suitable temperature to proceed. The temperature has an impact on the decomposition rate and the proportion of products.
Furthermore, ammonium fluorosilicate can react with alkali substances. When it encounters a base, ammonium ions will quickly combine with hydroxide ions to form ammonia and water. And fluorosilicate ions will also interact with cations in bases to form new compounds. This reaction demonstrates its affinity with bases and is often used in chemical preparation and analysis.
And in some metal salt solutions, it can initiate precipitation reactions. In case of specific metal ions, fluorosilicate ions will combine with them to form insoluble fluorosilicate precipitation. This property is commonly used in the separation and identification of metal ions, and in ancient chemical experiments and processes, it is also a commonly used method. In short, ammonium fluorosilicate has rich and diverse chemical properties and has important applications in many chemical fields.

The method of making ammonium fluorosilicate (Ammonium Silicofluoride) is not detailed in the ancient book "Tiangong Kaiwu", but one or two can be deduced according to the relevant process.
To make ammonium fluorosilicate, fluorosilicate can be obtained first. Fluorite (calcium fluoride) is often co-heated with sulfuric acid. Its reaction is like fluorite encountering strong acid, fluorine ions escape, and it is transposed with sulfate, so hydrogen fluoride gas is obtained. Hydrofluoride gas is absorbed with water and reacts with silica to form fluorosilicate.
As for the preparation of ammonium fluorosilicate, even fluorosilicate reacts with ammonium salts (such as ammonium carbonate, ammonia water, etc.). Taking ammonium carbonate as an example, the two meet, the ions mix, and the ammonium ions combine with fluorosilicate ions to precipitate ammonium fluorosilicate. This precipitate is filtered, washed, and dried to obtain the finished product.
If ammonia is used, it reacts with fluorosilicic acid to form an intermediate product. After appropriate conditions, ammonium fluorosilicate can also be obtained. The whole process should pay attention to the reaction conditions, such as temperature, concentration, reaction time, etc. If the temperature is too high, it may cause fluorosilicic acid to decompose; if the concentration is improper, it may affect the purity and yield of the product. Be careful when operating to obtain high-quality ammonium fluorosilicate.

Ammonium silicofluoride is a commonly used chemical product. When using it, many things need to be paid attention to.
The first priority is safety protection. This substance is toxic and irritating, and contact can cause skin, eye and respiratory discomfort. When taking it, be sure to wear protective clothing, protective gloves and goggles. If you work in a poorly ventilated place, you should also wear a gas mask to prevent dust inhalation. In case of accidental contact, rinse with plenty of water immediately, and seek medical attention in severe cases.
This time, store it properly. It should be placed in a cool, dry and well-ventilated place, away from fire and heat sources. Because it is easily decomposed by moisture or heat, which affects the quality and performance, it should be sealed and stored to prevent contact with air and moisture.
Furthermore, the use process is strictly operated according to the specifications. According to the specific use and needs, accurately control the dosage and operating conditions. When configuring the solution, pay attention to the dissolution sequence and speed, and stir fully to ensure uniform dissolution. For chemical reactions, it is necessary to strictly control the reaction temperature, time and other parameters to ensure the smooth progress of the reaction and the quality of the product.
In addition, pay attention to its compatibility. Avoid mixing or mixing with alkaline substances, strong oxidants, etc., to prevent violent reactions and cause danger. After use, properly dispose of the remaining substances and containers, follow environmental protection requirements, and do not discard them at will to avoid polluting the environment.
The use of ammonium fluorosilicate requires safety, standardized operation, and careful treatment of each link to ensure personnel safety and smooth production.