3-propionylpyridine, 98+%

3-Propionylpyridine, 98 +%, has a wide range of uses. In the field of organic synthesis, it is often used as a key intermediate. Due to its special structure, it has a pyridine ring and propionyl group, which can be derived from a wide variety of organic compounds through many chemical reactions.
First, in the field of pharmaceutical chemistry, it has made a lot of contributions to the synthesis of specific drug molecules. The molecular structure of many drugs depends on its participation in the construction, chemically modified and transformed, giving drugs unique pharmacological activities, such as antibacterial and anti-inflammatory effects.
Second, in the field of materials science, it also plays an important role. It can be used to prepare functional materials, such as optical materials, conductive materials, etc. Because it can participate in the construction of the molecular structure of the material, which in turn affects the physical and chemical properties of the material, so that it has a specific function.
Third, in the synthesis of dyes, it is also indispensable. As a raw material to participate in the reaction, it helps to generate bright colors and excellent performance dyes, which are used in textiles, printing and dyeing and other industries.
In addition, in the field of fragrance synthesis, the flavors it participates in can add a unique aroma to the product, which is used in cosmetics, food and other industries to improve product quality and sensory experience. In short, 3-propionyl pyridine, 98 +%, plays an important role in many branches of chemical industry and is of great significance to promote the development of related industries.

In order to maintain the quality of 3-propionyl pyridine (98 +%), various measures need to be taken. The first storage method should be placed in a cool, dry and well-ventilated place. Because if the substance is exposed to hot and humid conditions, it may cause quality damage. Humid heat can easily lead to its chemical changes, resulting in a decrease in purity and an increase in heterogeneity.
Furthermore, the packaging must be tight. Store in a sealed container to prevent the intrusion of external air, water vapor and sundries. If the packaging is omitted, oxygen or substances in the air should cause oxidation and change, and the quality will also be damaged.
When using, follow strict procedures. Measure clean utensils to prevent foreign matter from mixing. And the operation should be fast to avoid long-term exposure.
Repeat, regular quality inspection is also necessary. Use suitable analysis methods, such as chromatography and spectroscopy, to detect purity and impurity conditions. If the quality is reduced, quickly find the cause and solve it.
Also, when transporting, it is stable and comprehensive. Shockproof, anti-collision and temperature control and humidity, to ensure constant quality between transports. So many measures are taken in parallel to ensure that 3-propionylpyridine (98 +%) is of good quality.

3-Propionylpyridine, 98 +%, the storage conditions are as follows. This substance should be stored in a cool, dry and well-ventilated place. It should be kept away from fires and heat sources, because it is flammable to a certain extent, and it can be dangerous to burn in case of open flames and hot topics. It should be stored separately from oxidants, acids, alkalis, etc., and must not be mixed to prevent severe chemical reactions and endanger safety. The storage area should be equipped with suitable materials to contain substances that may leak. Due to its relatively active chemical properties, it is easy to cause changes in properties under improper storage conditions or in contact with other substances. Therefore, it is essential to follow the above storage specifications, which can effectively ensure its quality and safety, avoid accidents, and ensure the stability of the storage process.

What you are asking is the price range of 3-propionyl pyridine (98 +%). However, in "Tiangong Kaiwu", the concept of chemical substances at that time was very different from today, and there was no such price of fine chemical products. In today's world, the price of this chemical fluctuates erratically and is affected by many factors.
First, the price of raw materials is the key. If the raw materials required for its preparation are scarce or expensive, the cost will increase, resulting in a high price. Second, the production process and scale have a great impact. Efficient and large-scale production may reduce its cost and make the price accessible to the people; complex and small-scale production, the price is easy to be high. Third, the state of market supply and demand is related to the price. If the demand is strong and the supply is insufficient, the price will rise; if the supply exceeds the demand, the price will decline.
Furthermore, different merchants and different purchase quantities have different prices. For small-scale purchases, merchants may have higher prices due to operating costs, etc.; for large-scale purchases, there may be discounts. As far as I know, in today's market, the price may range from tens to hundreds of yuan per kilogram, but this is only a rough estimate. The actual price should be consulted with chemical raw material suppliers, and the quotation at that time shall prevail.

The process for preparing 3-propionylpyridine (content above 98%) is described below.
First, pyridine is taken as the starting material, which is quite commonly used in organic synthesis. Pyridine is reacted with a suitable acylating agent, such as propionyl chloride, under specific conditions. This reaction requires a suitable catalyst, and anhydrous aluminum trichloride can be selected, which can effectively promote the reaction in the acylation reaction.
During the reaction, it is crucial to control the temperature. The temperature of the reaction system should be maintained at a low temperature, such as 0-5 ° C, and propionyl chloride should be slowly added dropwise to the mixed system containing pyridine and anhydrous aluminum trichloride. After the dropwise addition, gradually raise the temperature to room temperature, and continue to stir for a period of time to fully proceed the reaction.
After the reaction is completed, the product needs to be separated and purified. The reaction mixture is first poured into ice water to decompose the excess anhydrous aluminum trichloride. Then, an organic solvent, such as dichloromethane, is used for extraction. After multiple extractions, the organic phases are combined and dried with anhydrous sodium sulfate to remove the moisture.
Then, the organic solvent is removed by reduced pressure distillation. Finally, the product is further purified by column chromatography, and an appropriate eluent is selected to obtain a high purity of 3-propionyl pyridine, up to 98% purity. The purity and yield of the product were significantly affected by the selection of raw materials, the control of reaction conditions and the separation and purification steps.