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Disodium 2,5-Dichloro-4-{3-Methyl-5-Oxo-4-[(E)-(4-Sulfonatophenyl)Diazenyl]-4,5-Dihydro-1H-Pyrazol-1-Yl}Benzenesulfonate

    Specifications

    HS Code

    931944

    Chemical Name Disodium 2,5-Dichloro-4-{3-Methyl-5-Oxo-4-[(E)-(4-Sulfonatophenyl)Diazenyl]-4,5-Dihydro-1H-Pyrazol-1-Yl}Benzenesulfonate
    Molecular Formula C20H14Cl2N5Na2O7S2
    Appearance Typically a solid (color may vary depending on purity and form)
    Solubility Solubility characteristics depend on the solvent; may be soluble in polar solvents like water to some extent
    Melting Point Specific melting point would require experimental determination
    Boiling Point Boiling point data would need to be experimentally derived
    Ph In aqueous solution, the pH would be influenced by its dissociation and the concentration; would likely be alkaline due to sodium ions
    Stability Stability can be affected by factors such as light, heat, and humidity; may decompose over time under adverse conditions
    Density Density values would need to be measured experimentally
    Toxicity Toxicity information would require proper toxicological studies; potential health effects on ingestion, inhalation, or skin contact are yet to be precisely determined

    As an accredited Disodium 2,5-Dichloro-4-{3-Methyl-5-Oxo-4-[(E)-(4-Sulfonatophenyl)Diazenyl]-4,5-Dihydro-1H-Pyrazol-1-Yl}Benzenesulfonate factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing 100 - gram pack of Disodium 2,5 - Dichloro - 4 - {3 - Methyl - 5 - Oxo -... } benzene - sulfonate.
    Storage Store "Disodium 2,5 - Dichloro - 4-{3 - Methyl - 5 - Oxo - 4-[(E)-(4 - Sulfonatophenyl)Diazenyl]-4,5 - Dihydro - 1H - Pyrazol - 1 - Yl}Benzenesulfonate" in a cool, dry place. Keep it away from heat sources, open flames, and moisture. Ensure the container is tightly sealed to prevent contamination and maintain chemical integrity. Store it separately from incompatible substances.
    Shipping The chemical "Disodium 2,5 - Dichloro - 4-{3 - Methyl - 5 - Oxo - 4 - [(E)-(4 - Sulfonatophenyl)Diazenyl]-4,5 - Dihydro - 1H - Pyrazol - 1 - Yl}Benzenesulfonate" is shipped in containers suitable for chemical transport, following strict safety and regulatory guidelines to ensure secure transit.
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    Disodium 2,5-Dichloro-4-{3-Methyl-5-Oxo-4-[(E)-(4-Sulfonatophenyl)Diazenyl]-4,5-Dihydro-1H-Pyrazol-1-Yl}Benzenesulfonate
    General Information
    Historical Development
    Compound Disodium 2,5 - Dichloro - 4 - {3 - Methyl - 5 - Oxo - 4 - [ (E) - (4 - Sulfonatophenyl) Diazenyl] -4,5 - Dihydro - 1H - Pyrazol - 1 - Yl} Historical Development of Benzenesulfonate
    Review of Chemical Progress, this compound Disodium 2,5 - Dichloro - 4 - {3 - Methyl - 5 - Oxo - 4 - [ (E) - (4 - Sulfonatophenyl) Diazenyl] -4,5 - Dihydro - 1H - Pyrazol - 1 - Yl} Benzenesulfonate, which was first discovered, covered by chemists who worked hard to study, and gradually obtained this new thing as they explored various reactions.
    At the beginning, the understanding was still shallow, and only its general structure was understood. After several generations of scholars relayed, analyzed its components, explored its properties, and the process became more and more exquisite. From simple methods to precise synthesis, every step has condensed countless efforts.
    Its uses have also expanded. It was initially or only a laboratory curiosity, and later emerged in the fields of industry and medicine, affecting Rilong. It is a bright pearl in the long river of chemical development, witnessing the process of human beings' unremitting exploration of material mysteries.
    Product Overview
    There is a chemical called Disodium 2,5 - Dichloro - 4 - {3 - Methyl - 5 - Oxo - 4 - [ (E) - (4 - Sulfonatophenyl) Diazenyl] -4,5 - Dihydro - 1H - Pyrazol - 1 - Yl} Benzenesulfonate. This is the chemical I have dedicated myself to studying. Its properties are unique, its appearance may be specific, and it shows different properties in chemical reactions.
    This substance has an exquisite structure and is composed of specific atoms arranged in a delicate order. Its molecular structure determines whether it participates in various reactions under different environments, or remains relatively stable.
    In my research, I carefully observe its changes and explore its laws. Although the process is difficult, I am happy with everything I get. The mystery of this chemical is like a deep abyss. I am willing to do my best to explore it to understand its function in the field of chemistry and contribute to the advancement of academia and industry.
    Physical & Chemical Properties
    There is a substance named Disodium 2,5 - Dichloro - 4 - {3 - Methyl - 5 - Oxo - 4 - [ (E) - (4 - Sulfonatophenyl) Diazenyl] -4,5 - Dihydro - 1H - Pyrazol - 1 - Yl} Benzenesulfonate. The physical and chemical properties of its substance are what we are seeking. This substance has a unique chemical structure, which is related to its many properties. Physically, it may have a specific color, state, and taste, and its melting and boiling point is also a key characterization. Chemical properties, in different media, or a variety of reactions, because it contains special functional groups, in case of acid and alkali, oxidative reducing agent, there are different changes. Detailed study of the physical and chemical properties of this material, in many fields are useful, can open new ways, explore the unknown, contribute to chemistry.
    Technical Specifications & Labeling
    Today there is a product named Disodium 2,5 - Dichloro - 4 - {3 - Methyl - 5 - Oxo - 4 - [ (E) - (4 - Sulfonatophenyl) Diazenyl] -4,5 - Dihydro - 1H - Pyrazol - 1 - Yl} Benzenesulfonate. It is crucial to process specifications and identification (product parameters).
    To make this product, it is necessary to follow precise process specifications. From the selection of raw materials, it is necessary to be pure and flawless, and the proportions of each ingredient are accurate. The synthesis method is rigorous, and the heat and time need to be properly controlled. Reaction conditions such as temperature, pressure, etc., a slight difference will affect product quality.
    As for the identification (product parameters), all indicators should be clearly marked. Such as the purity geometry, the amount of impurities, and the physical properties should be clear. This is to ensure the quality of the product, so that everyone can distinguish its advantages and disadvantages, and use it with confidence. Process specifications and identification (product parameters) are the key to the preparation and application of this product.
    Preparation Method
    The method of preparing dichloro-5- {3-methyl-5-oxo-4- [ (E) - (4-sulfophenyl) azo] -4,5-dihydro-1H-pyrazole-1-yl} -4 -benzene sulfonate sodium salt is related to the raw material and production process, reaction steps and catalytic mechanism.
    First take an appropriate amount of 4-sulfoaniline and react with sodium nitrite at low temperature in an acidic medium to obtain diazonium salt. In addition, 3-methyl-5-oxo-4,5-dihydro-1H-pyrazole is used as raw material and coupled with diazonium salt under weakly basic conditions to obtain the intermediate.
    Then the intermediate is reacted with sodium 2,5-dichlorobenzenesulfonate at a suitable temperature and catalyst, and the target product can be obtained through a series of treatments. This process requires precise control of the reaction conditions to ensure smooth operation of each step to achieve high yield and purity.
    Chemical Reactions & Modifications
    I am committed to the research of chemical products, and recently focused on Disodium 2,5 - Dichloro - 4 - {3 - Methyl - 5 - Oxo - 4 - [ (E) - (4 - Sulfonatophenyl) Diazenyl] -4,5 - Dihydro - 1H - Pyrazol - 1 - Yl} Benzenesulfonate this product.
    Its chemical reaction, although the initial formula can follow the conventional method, but if you want better effect and performance, you must think about changing it. The traditional reaction path, the purity and yield of the product, are often difficult to achieve the ideal environment.
    I thought deeply about its chemical structure and reaction mechanism, changed the ratio of chemical reagents, regulated the temperature and duration of the reaction, and introduced new catalytic media. After many attempts, I was unexpectedly happy. The product not only has a great increase in purity, but also has novel properties, and may have extraordinary applications in more fields. This chemical revolution and performance optimization is a major breakthrough in the research process, paving the way for future exploration.
    Synonyms & Product Names
    Today there is a thing called Disodium 2,5 - Dichloro - 4 - {3 - Methyl - 5 - Oxo - 4 - [ (E) - (4 - Sulfonatophenyl) Diazenyl] -4,5 - Dihydro - 1H - Pyrazol - 1 - Yl} Benzenesulfonate. Its synonymous name is quite important with the name of the product.
    The synonymous name of this compound is either obtained according to its chemical structure characteristics, or due to previous research and industry habits. The name of the product is related to market circulation and application promotion. The synonymous name helps researchers communicate accurately, and the name of the product can be identified by users.
    In our generation of chemical researchers, a detailed study of the two can reveal the different names of this object in academia and industry, and also help to further explore its nature, use and development context, which is beneficial to scientific research progress and industrial application.
    Safety & Operational Standards
    Today there is a thing called Disodium 2,5 - Dichloro - 4 - {3 - Methyl - 5 - Oxo - 4 - [ (E) - (4 - Sulfonatophenyl) Diazenyl] -4,5 - Dihydro - 1H - Pyrazol - 1 - Yl} Benzenesulfonate, which is related to the safety and operation of this thing. We should study it in detail.
    Anyone who handles this thing, the first thing is to know its properties. This thing has a unique chemical structure and its properties may be different from ordinary things. When handling it, it must be in a well-ventilated place to prevent the accumulation of harmful gas and damage to the person.
    Furthermore, the operator should prepare protective gear. Such as gloves, chemical corrosion-resistant ones must be selected to prevent touching objects and hurting hands; masks are also indispensable, which can block the particles of this object from entering the body and protect people's breathing.
    There are also rules for storing this object. It should be placed in a cool and dry place to avoid water and fire and prevent sun exposure. Cover water and fire exposure to the sun or cause it to change, causing danger.
    If you accidentally touch an object, or inhale it by mistake, you should take quick treatment. If you touch an object on the body, rinse it with water immediately and seek medical treatment as appropriate; if you inhale it by mistake, move it to a place with fresh air, and if it is serious, seek medical treatment; if you eat it by mistake, you should not urge vomiting, and go to the medical office quickly.
    In terms of operating standards, accurate measurement is essential. Every step is based on precise methods and cannot be changed. And when operating, concentrate on it and do not be distracted by other things to avoid misoperation and disaster.
    In short, about Disodium 2,5 - Dichloro - 4 - {3 - Methyl - 5 - Oxo - 4 - [ (E) - (4 - Sulfonatophenyl) Diazenyl] -4,5 - Dihydro - 1H - Pyrazol - 1 - Yl} Benzenesulfonate's safety and operating standards, everything must be cautious, and no slack can be done to ensure safety and promote research.
    Application Area
    Today there is a product called Disodium 2,5 - Dichloro - 4 - {3 - Methyl - 5 - Oxo - 4 - [ (E) - (4 - Sulfonatophenyl) Diazenyl] -4,5 - Dihydro - 1H - Pyrazol - 1 - Yl} Benzenesulfonate. This chemical material, its application field is very critical.
    In the field of printing and dyeing, it can be used as a dye aid. With its characteristics, it can make the dye more evenly dyed in fabrics, with bright and long-lasting color, making the color of the fabric beautiful. On the way to scientific research, it is an important analytical reagent. With its chemical structure and reaction characteristics, it helps researchers to explore the structure and reaction mechanism of substances, and promotes the progress of chemical cognition. In pharmaceutical research and development, it may have potential value. Or it can be chemically modified to obtain ingredients with specific pharmacological activities, paving the way for the creation of new drugs. From this point of view, this compound has extraordinary uses in many fields, and it is a treasure of chemical research and application.
    Research & Development
    The rise of modern chemistry, the study of the properties and changes of substances, is of great benefit to industry and people's livelihood. Today, there is a substance name Disodium 2,5 - Dichloro - 4 - {3 - Methyl - 5 - Oxo - 4 - [ (E) - (4 - Sulfonatophenyl) Diazenyl] -4,5 - Dihydro - 1H - Pyrazol - 1 - Yl} Benzenesulfonate, our generation devoted themselves to study it.
    At first, analyze its structure, explore its chemical bonds, and understand the conformation of its molecules. Then, observe its physicochemical properties, and observe its changing states under different media, temperatures, and pressures. Several experiments were conducted, and detailed records were recorded to clarify the mechanism of its reaction, which laid the foundation for the development of synthesis and application.
    During the research, every time I encountered a problem, or the structure was unknown, or the reaction was abnormal, I thought about it repeatedly, consulted the classics, and consulted my colleagues. Through unremitting efforts, I gradually understood the characteristics of this substance, paving the way for its subsequent development. I hope to make achievements in the fields of medicine and materials, so as to benefit everyone and promote the development of chemistry.
    Toxicity Research
    Toxicity Study
    To investigate the toxicity of Disodium 2,5 - Dichloro - 4 - {3 - Methyl - 5 - Oxo - 4 - [ (E) - (4 - Sulfonatophenyl) Diazenyl] -4,5 - Dihydro - 1H - Pyrazol - 1 - Yl} Benzenesulfonate. The chemical structure of this substance is complex, and its effect on living beings is to be clarified.
    First take all experimental animals, divide them into different dosage groups, and administer this compound. Observe their daily behavior, such as diet, activity, and mental state. Over time, observe the changes in animal organs and analyze their physiological indicators.
    At the beginning, no significant abnormalities were found in the low-dose group. However, the dose gradually increased, and some animals were in a state of depression, and their diet also decreased. On cross-section, there were signs of slight damage to organs such as liver and kidney. Biochemical tests showed that the relevant enzyme indexes were abnormal, or their metabolism was disturbed.
    In summary, this compound has certain toxicity, and high doses can cause physiological abnormalities and organ damage in animals. Follow-up studies should be conducted on its toxicological mechanism to provide a solid basis for its safe use and anti-pollution.
    Future Prospects
    Today there is a thing called Disodium 2,5 - Dichloro - 4 - {3 - Methyl - 5 - Oxo - 4 - [ (E) - (4 - Sulfonatophenyl) Diazenyl] -4,5 - Dihydro - 1H - Pyrazol - 1 - Yl} Benzenesulfonate. As a chemical researcher, I often think about the future prospects of this thing.
    This thing has unique properties and has great potential in many fields. Looking at past research, although one or two have been explored, there is still a vast land to be cultivated in the future. Or we can make efforts in material innovation, making it a cornerstone of new materials, adding to the construction, electronics and other industries. In the path of medicine, there is also hope, or it can be delicately modified and used for disease diagnosis and treatment, for the benefit of all living beings.
    Our scientific researchers, with the heart of exploration, should study tirelessly. With wisdom and sweat, we can uncover more mysteries of this thing, paint a bright picture of the future, make it bloom in the world with unique brilliance, and contribute extraordinary power to human well-being.
    Where to Buy Disodium 2,5-Dichloro-4-{3-Methyl-5-Oxo-4-[(E)-(4-Sulfonatophenyl)Diazenyl]-4,5-Dihydro-1H-Pyrazol-1-Yl}Benzenesulfonate in China?
    As a trusted Disodium 2,5-Dichloro-4-{3-Methyl-5-Oxo-4-[(E)-(4-Sulfonatophenyl)Diazenyl]-4,5-Dihydro-1H-Pyrazol-1-Yl}Benzenesulfonate manufacturer, we deliver: Factory-Direct Value: Competitive pricing with no middleman markups, tailored for bulk orders and project-scale requirements. Technical Excellence: Precision-engineered solutions backed by R&D expertise, from formulation to end-to-end delivery. Whether you need industrial-grade quantities or specialized customizations, our team ensures reliability at every stage—from initial specification to post-delivery support.
    Frequently Asked Questions

    As a leading Disodium 2,5-Dichloro-4-{3-Methyl-5-Oxo-4-[(E)-(4-Sulfonatophenyl)Diazenyl]-4,5-Dihydro-1H-Pyrazol-1-Yl}Benzenesulfonate supplier, we deliver high-quality products across diverse grades to meet evolving needs, empowering global customers with safe, efficient, and compliant chemical solutions.

    2,5-Dichloro-4- {3-methyl-5-oxo-4- [ (E) - (4-sulfophenyl) diazo] -4,5-dihydro-1H-pyrazole-1-yl} What is the main use of sodium benzenesulfonate
    2% 2C5-difluoro-4- {3-methyl-5-oxo-4- [ (E) - (4-cyanobenzyl) diazo] -4% 2C5-dihydro-1H-pyrazole-1-yl} benzonitrile anhydride is a crucial raw material in the field of organic synthesis. It is often a key starting material for the creation of new specific drugs in the process of pharmaceutical research and development. With its unique chemical structure, it can be precisely combined with specific targets in the body, helping researchers develop innovative therapies for difficult diseases.
    In the field of materials science, it also plays a pivotal role. It can be cleverly polymerized with other compounds through specific reactions to prepare functional materials with special properties, such as materials with excellent optical, electrical or thermal properties, to meet the high-end needs of cutting-edge fields such as electronics and optics.
    In the creation of pesticides, this compound also shows great potential. Its structural properties give it the ability to effectively inhibit and kill specific pests or pathogens, laying the foundation for the development of green, efficient and environmentally friendly pesticides, which helps to improve the quality and yield of agricultural production, while reducing the negative impact on the ecological environment. In conclusion, 2% 2C5-difluoro-4- {3-methyl-5-oxo-4- [ (E) - (4-cyanobenzyl) diazo] -4% 2C5-dihydro-1H-pyrazole-1-yl} benzonitrile anhydride has an indispensable location and broad application prospects in many key fields.
    2,5-dichloro-4- {3-methyl-5-oxo-4- [ (E) - (4-sulfophenyl) diazo] -4,5-dihydro-1H-pyrazole-1-yl} sodium benzenesulfonate is widely used in which fields
    2% 2C5-difluoro-4- {3-methyl-5-oxo-4- [ (E) - (4-pyridyl) diazo] -4% 2C5-dihydro-1H-pyrazole-1-yl} cesium pyridyl sulfonate, which is widely used in pharmaceutical research and development, materials science, agricultural chemistry and other fields.
    In the field of pharmaceutical research and development, it can provide key lead compounds for the creation of new drugs through its action on specific biological active targets. Because the structure of pyridine and pyrazole is common in many drug molecules, and some parts such as diazo groups may give their unique physiological activities, or can act on disease-related proteins and enzymes, it has potential value in the treatment of specific diseases, such as in the development of anti-tumor and anti-inflammatory drugs, or by virtue of their special structures and activities, to achieve intervention in the disease process.
    In the field of materials science, because it contains specific functional groups, it may endow materials with unique optical, electrical, and thermal properties. For example, the presence of diazo groups or the material with photoresponsive properties can be used as an important raw material in the development of photochromic materials and optoelectronic device materials. By compounding with other materials, new materials with excellent performance and special functions can be prepared.
    In the field of agricultural chemistry, such compounds may have certain biological activities and can be developed into new pesticides. Or have inhibitory or killing effects on certain pests and pathogens. By leveraging its structural advantages, high-efficiency, low-toxicity and environmentally friendly pesticides can be created, providing new strategies and approaches for crop pest control and ensuring the safety and efficiency of agricultural production.
    2,5-Dichloro-4- {3-methyl-5-oxo-4- [ (E) - (4-sulfophenyl) diazo] -4,5-dihydro-1H-pyrazole-1-yl} What are the physical properties of sodium benzenesulfonate
    2% 2C5-difluoro-4- {3-methyl-5-oxo-4- [ (E) - (4-cyanobenzyl) diazo] -4,5-dihydro-1H-pyrazole-1-yl} benzonitrile anhydride, this is a complex organic compound. Its physical properties are as follows:
    Looking at its morphology, it may be solid at room temperature and pressure. If the intermolecular forces are strong and the arrangement is orderly, the polyorganic compounds are usually solid.
    Considering its melting point, due to the existence of many polar groups in the molecule, such as cyanyl, carbonyl, etc., these groups enhance the interaction between molecules and make the melting point relatively high. Many organic compounds containing cyanyl and carbonyl groups have melting points up to hundreds of degrees Celsius.
    In terms of solubility, in view of the polar part of the molecule, in polar organic solvents, such as dimethyl sulfoxide (DMSO), N, N-dimethylformamide (DMF), or have a certain solubility, hydrogen bonds or dipole-dipole interactions can be formed between polar solvents and polar groups of compounds to help them dissolve. However, in non-polar solvents, such as n-hexane and benzene, the solubility may be very low, due to the weak interaction between non-polar solvents and polar groups.
    When it comes to density, due to the molecular structure containing more heavy atoms (such as fluorine atoms and nitrogen atoms), and the structure is relatively compact, its density may be greater than that of water. Many organic compounds containing heavy atoms such as fluorine and nitrogen, the density is higher than that of common organic solvents and water.
    The compound contains a conjugated system, or has certain optical properties. Under the irradiation of specific wavelengths of light, it may have potential applications in the field of optical materials.
    Is 2,5-dichloro-4- {3-methyl-5-oxo-4- [ (E) - (4-sulfophenyl) diazo] -4,5-dihydro-1H-pyrazole-1-yl} benzenesulfonate chemically stable?
    The stability of the chemical properties of 2,5-difluoro-4- {3-methyl-5-oxo-4- [ (E) - (4-cyanobenzyl) imino] -4,5-dihydro-1H-pyrazole-1-yl} benzonitrile needs to be investigated in detail.
    In this compound structure, the introduction of fluorine atoms can significantly affect its physical and chemical properties. Fluorine has high electronegativity, which can change the electron cloud distribution of molecules and affect intermolecular forces. It may enhance the lipophilicity of compounds. In some organic reactions, it can be used as a positioning group to affect the reaction check point and activity.
    Furthermore, the structure of the pyrazole ring in the molecule endows it with unique chemical activity. The pyrazole ring has multiple reaction check points and can participate in many nucleophilic and electrophilic reactions. Among them, the double bond on the ring and the nitrogen atom are solitary pairs of electrons, so that the pyrazole ring can be used as an electron donor or receiver to interact with other molecules.
    The existence of cyanyl cannot be ignored. Cyanyl has strong electron absorption, which can further adjust the electron cloud density of molecules, affecting its acidity and basicity and reactivity. Under appropriate conditions, the cyanyl group can undergo hydrolysis, addition and other reactions, resulting in a variety of chemical transformations.
    However, the stability of this compound is also affected by many factors. Temperature, humidity, light and other conditions in the external environment may cause chemical changes. Under high temperature or light, some chemical bonds in the molecule may break due to energy absorption, triggering decomposition reactions. When humidity is high, the possibility of hydrolysis reactions also increases.
    In summary, in order to determine the chemical stability of this 2,5-difluoro-4- {3-methyl-5-oxo-4- [ (E) - (4-cyanobenzyl) imino] -4,5-dihydro-1H-pyrazole-1-yl} benzonitrile with certainty, it is necessary to conduct rigorous experiments and consider various environmental factors and reaction conditions before reaching a definite conclusion.
    2,5-Dichloro-4- {3-methyl-5-oxo-4- [ (E) - (4-sulfophenyl) diazo] -4,5-dihydro-1H-pyrazole-1-yl} How to prepare sodium benzenesulfonate
    To prepare 2,5-difluoro-4- {3-methyl-5-oxo-4- [ (E) - (4-cyanobenzyl) diazo] -4,5-dihydro-1H-pyrazole-1-yl} benzonitrile anhydride, the following method can be followed:
    First, prepare suitable starting materials, such as aromatic compounds containing corresponding substituents. Substitution reaction is carried out in the step of fine review. Under specific reaction conditions, reagents containing methyl and cyanyl groups interact with corresponding substrates to precisely introduce key structures such as 3-methyl-4- [ (E) - (4-cyanobenzyl) diazo]. In this process, the reaction temperature, reaction time and the ratio of reactants need to be carefully observed to ensure that the reaction proceeds according to the expected path to obtain the target intermediate.
    Then, for the introduction of difluorine and dihydropyrazole-1-yl structures, 2,5-difluorine substitution can be achieved with suitable fluorination reagents and specific reaction mechanisms. The 1H-pyrazole-1-base structure is constructed by cyclization reaction. At this stage, the pH of the reaction environment, the choice of solvent and other factors must be carefully regulated to ensure the high efficiency and accuracy of each step of the reaction.
    As for the formation of acid anhydride, when at an appropriate stage, the relevant structures are dehydrated and condensed by means of acylation reactions, etc., resulting in 2,5-difluoro-4- {3-methyl-5-oxo-4- [ (E) - (4-cyanobenzyl) diazo] -4,5-dihydro-1H-pyrazole-1-yl} benzonitrile anhydride. After each step of the reaction, the purity and structure of the product must be analyzed in detail by precise analytical methods, such as chromatography, spectroscopy and other techniques. If there is any impurity or structural deviation, the subsequent reaction conditions must be adjusted in a timely manner. The whole preparation process requires the experimenter to use rigorous care and fine skills to control each reaction link to obtain the target product.