3-Pyridinecarboxylic acid magnesium salt

The main uses of 3-aminopropionitrile are commonly found in "Tiangong Kaizi". Although this substance is not detailed, according to later chemical knowledge, its use is quite extensive.
First, in the field of organic synthesis, 3-aminopropionitrile is an important intermediate. It can participate in the preparation of a variety of complex organic compounds and be converted into molecules with special structures and functions through a series of reactions. For example, it can condensate with aldose and ketone compounds to form nitrogen-containing heterocyclic structures. Such structures are commonly found in many drug molecules and bioactive substances, laying the foundation for the development of new drugs.
Second, in materials science, this substance can be used to synthesize polymers with special properties. Introducing 3-aminopropionitrile into the main chain or side chain of the polymer can endow the material with unique chemical and physical properties. Like the preparation of polymer adsorbents with good adsorption properties, it can be used in wastewater treatment, gas separation and other fields. Through the interaction between its nitrogen-containing groups and specific substances, efficient enrichment and separation of target substances can be achieved.
Third, it is also used in the preparation of surfactants. Due to the existence of amino groups and nitrile groups in its structure, surfactant molecules with amphiphilicity can be modified by appropriate chemical reactions. This type of surfactant is indispensable in the daily chemical, oil extraction and other industries, can reduce the surface tension of liquids, enhance emulsification, dispersion and other properties, such as in detergents to help disperse and remove oil pollution, and improve crude oil recovery in oil extraction.

3-Aminopropane sulfonate lactone is a crucial raw material in the field of organic synthesis. Its physical and chemical properties are quite characteristic, as detailed below:
- ** Properties **: This substance is usually in the state of white to slightly yellow crystalline powder, with a pure appearance and fine texture. In sunlight, it may have a slight luster flickering, just like a fine pearl.
- ** Melting point **: Its melting point is about 138-141 ° C. When the temperature gradually rises to the melting point, the substance will slowly transform from solid to liquid, just like melting ice and snow, from a solid state to a flexible liquid.
- ** Solubility **: Soluble in water, quickly dispersed after entering water, just like salt melts in water to form a uniform solution; it also has a certain solubility in ethanol, although not as easily dispersed as in water, it can also partially dissolve and blend with ethanol; however, it is difficult to dissolve in organic solvents such as ether, and in ether, it is like sand and gravel entering water, making it difficult to blend.
- ** Stability **: Under conventional environmental conditions, this substance is quite stable, like a stable person, and is not easily disturbed by external minor factors. However, it should be noted that it is more sensitive to humidity. If the environmental humidity is high, it is easy to absorb water vapor, which will affect its own properties. < Br > - ** Reactivity **: Due to its structure containing amino and sulfonic acid lactone groups, it is chemically active and like an active dancer, capable of chemical reactions with many reagents. For example, it can react with acids and bases, showing diverse chemical changes in different pH environments; it can also participate in nucleophilic substitution reactions, interact with nucleophilic reagents, and derive rich new compounds, playing a key role in the stage of organic synthesis.

To prepare ethyl tri-β-hydroxybutyrate, the method is as follows:
First take an appropriate amount of ethyl acetoacetate and place it in a clean reactor. Prepare a number of ethanol and concentrated sulfuric acid, slowly pour the ethanol into the kettle, and stir while inverted to mix the two evenly. Then, add concentrated sulfuric acid dropwise, add caution, control the rate, and keep stirring to prevent local overheating. Concentrated sulfuric acid acts as a catalyst in this reaction to accelerate the reaction.
Add it up, seal the reactor, and move it to a constant temperature water bath to maintain the temperature within a suitable range, generally about 70 to 80 degrees Celsius. At this temperature, the reaction can occur smoothly, and part of the structure of ethyl acetoacetate interacts with ethanol. After complex chemical changes, it gradually converts to ethyl tri-β-hydroxybutyrate.
During the reaction, regular sampling is taken to check the reaction progress. When the reaction reaches the desired level, remove the reactor from the water bath, and after a little cooling, pour the mixture in the kettle into the separation funnel. Wash with an appropriate amount of saturated sodium carbonate solution. This step is designed to neutralize excess sulfuric acid, avoid sulfuric acid corrosion equipment in subsequent operations, and remove some impurities.
After washing, let stand and layer, and discard the lower aqueous phase. The upper organic phase is washed several times with saturated saline to remove residual sodium carbonate and water-soluble impurities. After that, the organic phase is moved into a dry conical flask, an appropriate amount of anhydrous magnesium sulfate or anhydrous sodium sulfate is added, and it is allowed to stand for a while to remove the remaining water in the organic phase.
Finally, the dried organic phase is transferred to a distillation unit for distillation. Collect the fraction within a specific temperature range, which is pure ethyl tri-β-hydroxybutyrate. After these steps, the desired product can be obtained.

In today's market, the price of triamyl citric anhydride probably varies depending on quality and quantity. Those with good quality and abundant quantity, the price may be high; those with poor quality and small quantity, the price may be low.
Generally speaking, if it is a common commercial triamyl citric anhydride, the price per catty is about tens to hundreds of dollars. If its purity is extremely high, reaching the standard of medicinal or special industrial use, the price may rise sharply, up to hundreds of dollars per catty.
However, the market situation is unstable, and the price also changes with the change of supply and demand. If the supply exceeds the demand, the price may decline; if the demand is greater than the supply, the price will rise. In addition, the origin is different, and the price is also different. If it is shipped from a distance, the price may be higher than that of the local product due to the freight involved.
If you want to know the exact price, you need to go to various pharmaceutical shops and chemical raw material shops in the city to inquire in person, or ask merchants about this before you can get the actual price. And it is advisable to ask a few more companies to check the market, so as not to be deceived by false prices.

When using 3-aminopropionitrile, please pay attention to the following:
The first priority is to check with the equipment. Before use, it is necessary to check the 3-aminopropionitrile for any defects, cracks or shapes. Any slight damage may cause accidental damage during use, endangering the safety of patients. If there are cracks, even if it is not used, it should not be used, and new products must be updated to protect the safety of patients.
Furthermore, disinfection should not be ignored. 3-aminopropionitrile needs to be disinfected and can be used. The disinfection method should follow the phase, and can be used by steaming bacteria or chemical disinfection. The disinfection process needs to ensure that all parts are fully treated and do not remain dead to prevent the survival of bacteria and cause infection.
In the process of operation, the method should be especially precise. The applicator should be familiar with the use skills of 3-aminopropionitrile, and operate according to the correct steps. When inserting, the direction and depth should be appropriate, and care should be taken not to affect the surrounding tubes, gods, etc. For example, if the depth is inserted, it may be important to the depth; the direction deviation will fix the effect.
After use, it is also important to keep it properly. The use of 3-aminopropionitrile needs to be washed with clean water to remove waste, residue, etc., and then placed in dryness and waste to prevent damage and pollution. In this way, the next time you use it, you can ensure its good performance.
Therefore, the use of 3-aminopropionitrile can be checked, disinfected, operated to storage, and every step can be taken to ensure the safety of patients.