2-chloro-5-iodopyridine 98% 2g

2-Chloro-5-iodopyridine, with a content of 98% and a specification of 2 grams, is widely used. In the field of pharmaceutical synthesis, it is often a key intermediate. It can be combined with other organic compounds by specific reactions to construct complex molecular structures with specific pharmacological activities, or used to create new drugs and treat many diseases.
In the field of materials science, or it can be introduced into polymer systems through a series of reactions to give materials unique electrical, optical or chemical properties, such as improving the conductivity of materials and enhancing their sensitivity to specific substances, so as to meet the application requirements of special scenarios.
In the field of pesticide chemistry, it also has important functions. It can be used as a starting material for the synthesis of high-efficiency, low-toxicity and environmentally friendly pesticides. Through chemical modification and reaction, pesticide products with high selectivity and activity for specific pests or diseases can be designed and synthesized, providing strong support for pest control in agricultural production.
In addition, in the study of organic synthetic chemistry, due to its pyridine ring and halogen atom properties, it can serve as a variety of reaction substrates, helping chemists explore novel reaction paths and synthesis methods, promoting the development and progress of organic synthetic chemistry, in order to achieve the effective synthesis of more complex and high-value organic compounds.

I look at your question and ask what the price of 2-chloro-5-iodopyridine is when the content reaches 98% and the amount is 2 grams. However, in "Tiangong Kaiwu", the price of this substance is not mentioned. At that time, the technology was not developed, and the preparation and synthesis of this organic compound could not be done by the technology at that time.
In today's world, the chemical industry is prosperous, and the price of these chemical reagents varies due to many factors. First, the price of raw materials, the raw materials required for the preparation of 2-chloro-5-iodopyridine, fluctuates, and the price of the finished product also changes. Second, the preparation is difficult and easy. If the preparation process is complicated, exquisite equipment and multiple processes are required, the cost will be high and the price will be expensive. Third, the market supply and demand, if there are many applicants and few suppliers, the price will rise; on the contrary, if the supply exceeds the demand, the price may drop.
To know the exact price, you can consult the chemical reagent supplier. Find this product on the e-commerce platform or the chemical professional trading website, check the price, or call the merchant to ask the price in detail. In this way, the actual price of 2-chloro-5-iodopyridine 2 grams can be obtained.

In order to maintain the 98% purity of 2-chloro-5-iodopyridine and the quality of 2 grams, we must follow the ancient method.
The first raw materials are excellent. When selecting materials, it is necessary to be pure and free of impurities, and its sources should be traceable and of high quality. Seek good materials in the market, carefully examine their quality and origin, and make sure that the raw materials are suitable for this system, which is the foundation of quality.
When preparing, you must be precise in your skills. Temperature control, speed regulation, and timing are all about success or failure. For example, "Tiangong Kaiwu" said: "Water and fire are both good and soil are combined." In the preparation of 2-chloro-5-iodopyridine, it is also necessary to accurately grasp the ratio of each substance and the reaction conditions. In terms of temperature control, if it is too high, the quality will change easily, and if it is too low, it should be slow and difficult to form. Therefore, it is necessary to measure with a good device to stabilize the temperature in a suitable area. The same is true for speed regulation. Stirring too fast or too slowly will affect the combination of molecules, which should be moderate and uniform.
The method of storage should not be ignored. It is advisable to choose a cool and dry place, away from direct exposure to strong light. Hold it in a sealed container to prevent it from touching and changing with other things. If exposed to the sun, wet places, or mixed with miscellaneous gas, the quality will be damaged for a long time.
The step of detection is indispensable. Test its purity and quantity with ancient methods or modern fine techniques. Always test its properties. If there is a slight change, quickly find the cause to ensure that the amount of 2 grams and 98% purity are not lost. In this way, follow all the rules and be careful to protect the quality of 2-chloro-5-iodopyridine.

2-Chloro-5-iodopyridine, content 98%, specification 2g, the storage conditions of this chemical reagent should be determined according to its physical and chemical properties. This substance has certain chemical activity and should be stored in a cool, dry and well-ventilated place.
In a cool place, the temperature is too high, or it may cause chemical reactions to occur, which affects the quality. The temperature should be controlled between 15 and 25 degrees Celsius, so that its chemical properties can be relatively stable.
The requirement for drying is due to moisture or interaction with the substance. Water vapor or reactions such as hydrolysis can damage its purity. Therefore, the humidity of the storage environment should be maintained at 40% to 60%.
Good ventilation is also essential. If the air in the storage space does not circulate, volatile gases accumulate, or flammable and explosive mixed gases are formed, which endangers safety. And ventilation can avoid excessive local concentration to prevent accidental chemical reactions.
In addition, 2-chloro-5-iodopyridine should be stored separately from oxidants, reducing agents, acids, bases, etc., and must not be mixed. Because of its active chemical nature, contact with the above substances may cause violent reactions, resulting in serious consequences such as combustion and explosion. When storing, it is also necessary to ensure that the packaging is complete to prevent leakage. After taking it, the package should be sealed in time to reduce its contact with air. Only by following these storage conditions can the quality and safety of 2-chloro-5-iodopyridine be guaranteed.

If the purity of 2-chloro-5-iodopyridine reaches 98%, the following method can be used.
The first chromatography method can be gas chromatography (GC) or high performance liquid chromatography (HPLC). Taking HPLC as an example, prepare a mobile phase first, and select a suitable chromatographic column according to the nature of the compound, such as C18 column. The sample is dissolved in a suitable solvent, prepared into a solution of a certain concentration, and injected into the HPLC instrument. Carried by the mobile phase, the components in the sample are separated in the chromatographic column, and peaks are produced according to the retention time. Comparing the peak area of the sample with the standard product peak area of known purity, and the ratio of the peak area, the purity of 2-chloro-5-iodopyridine can be calculated by normalization method or external standard method.
Furthermore, mass spectrometry (MS) can be used. It can obtain the molecular weight and structural fragment information of the compound. The sample is ionized, and the ions are separated and detected according to the mass-charge ratio under the action of electric and magnetic fields. If the sample purity is high, the mass spectrogram should mainly show the relevant peaks of the target compound, with few impurity peaks. And combined with the exact mass number, the structure and purity of the compound can be further confirmed.
Elemental analysis is also a method. Measure the content of carbon, hydrogen, nitrogen, chlorine, iodine and other elements in the sample and compare it with the theoretical value. If the element content is in high agreement with the stoichiometric ratio of 2-chloro-5-iodopyridine, the purity is good; if the deviation is large, it contains more impurities. However, the elemental analysis requires precision instruments and the operation is more complicated.
Infrared spectroscopy (IR) can assist in judgment. Different functional groups have specific absorption peaks in the infrared region. 2-chloro-5-iodopyridine has its own characteristic absorption peaks, such as the absorption peak of pyridine ring. If the spectrogram of the sample is consistent with the standard spectrogram and there are no additional heterogeneous peaks, the purity can be proved to be higher. However, IR is mainly used for the confirmation of functional groups, and it is difficult to quantify purity. It is often used in combination with other methods.