Products

2,2'-Dihydrooxy-4,4'-Dimethoxy Benzophenone-5,5'-Disodium Sulfonate

    Specifications

    HS Code

    329158

    Chemical Formula C15H12Na2O11S2
    Molecular Weight 488.36 g/mol
    Appearance Yellowish - white powder
    Solubility Soluble in water
    Ph Range 6.0 - 8.0 (1% aqueous solution)
    Melting Point Decomposes before melting
    Density Approx. 1.4 g/cm³
    Stability Stable under normal conditions
    Cas Number 8047-15-2

    As an accredited 2,2'-Dihydrooxy-4,4'-Dimethoxy Benzophenone-5,5'-Disodium Sulfonate factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing 1 - kg package of 2,2'-Dihydroxy - 4,4'-Dimethoxy Benzophenone - 5,5'-Disodium Sulfonate.
    Storage Store 2,2'-Dihydroxy - 4,4'-Dimethoxy Benzophenone - 5,5'-Disodium Sulfonate in a cool, dry place. Keep it away from heat sources and direct sunlight to prevent degradation. Ensure the container is tightly sealed to avoid moisture absorption, as the powder may clump or its properties may change. Store separately from incompatible substances to maintain its chemical integrity.
    Shipping 2,2'-Dihydroxy - 4,4'-Dimethoxy Benzophenone - 5,5'-Disodium Sulfonate is shipped in sealed, corrosion - resistant containers to prevent moisture and external contamination, ensuring safe transportation of this chemical.
    Free Quote

    Competitive 2,2'-Dihydrooxy-4,4'-Dimethoxy Benzophenone-5,5'-Disodium Sulfonate prices that fit your budget—flexible terms and customized quotes for every order.

    For samples, pricing, or more information, please call us at +8615371019725 or mail to sales7@alchemist-chem.com.

    We will respond to you as soon as possible.

    Tel: +8615371019725

    Email: sales7@alchemist-chem.com

    2,2'-Dihydrooxy-4,4'-Dimethoxy Benzophenone-5,5'-Disodium Sulfonate
    General Information
    Historical Development
    Guanfu "2,2 '-Dihydroxy-4,4' -Dimethoxy Benzophenone-5,5 '-Disodium Sulfonate" This object is in the field of chemistry, after years, gradually emerging. In the past, the path of chemistry was not as clear as it is today, but the ancestors used their diligence and sensitivity to explore and hide.
    At the beginning, the understanding of this object was still shallow, only a little glimpse of its characteristics. Afterwards, the sages worked tirelessly and tried it repeatedly on the experimental platform. With the passage of time, the technology became more and more exquisite, and the understanding of its structure and properties became more and more detailed.
    From ignorance of the unknown to clear insight, it is like clearing the clouds and seeing the sun. From accidental discovery to systematic research, its development path has gathered countless efforts. Time is like an arrow, and this thing has shown its unique ability in various fields such as industry and scientific research. It has contributed to the progress of chemistry and become an indispensable state today. It is really a wonderful stroke in the long volume of chemical development.
    Product Overview
    2,2 '-Dihydroxy-4,4' -dimethoxy-benzophenone-5,5 '-sodium disulfonate, which is a chemical product I have recently focused on. Its appearance is [specific appearance, can be supplemented with white crystalline powder], and its properties are quite unique.
    This compound has great potential in the field of photostability. It can effectively resist ultraviolet rays in many materials and prevent the material from aging and deterioration due to light. In its structure, the dihydroxy and dimethoxy groups give it a special electron cloud distribution, while the sodium disulfonate group improves its solubility in water.
    During the preparation process, it is necessary to precisely control the reaction conditions, such as temperature, pH and reaction time. If the temperature is too high or too low, it may reduce the yield or form impurities. In the future, I will further explore its application efficiency in different systems to expand its practical use.
    Physical & Chemical Properties
    2,2 '-Dihydroxy-4,4' -dimethoxybenzophenone-5,5 '-sodium disulfonate, this substance has attracted much attention in our chemical research. Its physical and chemical properties are unique. According to its physical properties, it may be in a specific form at room temperature, with a certain color and texture. Regarding its solubility, it may exhibit good solubility properties in some solvents, which is related to its dispersion and application in different systems. In terms of chemical properties, its molecular structure endows specific reactivity, or can participate in a variety of chemical reactions, such as substitution and addition reactions with specific reagents. These characteristics determine its potential use in chemical, materials and other fields. In-depth exploration of the physical and chemical properties of this substance can provide a key basis for technological innovation and product optimization in related fields.
    Technical Specifications & Labeling
    Today there is a product called "2,2 '-Dihydroxy-4,4' -Dimethoxy Benzophenone-5,5 '-Disodium Sulfonate". It is crucial to explore the process specifications and identification (product parameters).
    The process specifications are related to the fine process of preparation of this product. From the selection of raw materials, it is necessary to be pure and free of impurities, and to meet specific standards. To the reaction conditions, such as temperature, duration, pH, all need to be precisely controlled, and there is a slight difference, or the quality may change. The
    logo (product parameters) cannot be ignored, and it clearly marks the product characteristics, such as ingredient ratio, physical properties, chemical properties, etc. The process specifications are the cornerstone and the logo is the guide, complementing each other to ensure the high quality of this "2,2 '-Dihydroxy-4,4' -Dimethoxy Benzophenone-5,5 '-Disodium Sulfonate", which is fully capable in applications.
    Preparation Method
    The method of preparing 2,2 '-dihydroxy-4,4' -dimethoxybenzophenone-5,5 '-sodium disulfonate is related to the raw materials and production process, reaction steps and catalytic mechanism. First take an appropriate amount of raw materials and accurately mix them. For example, methoxybenzene and the corresponding compounds containing hydroxyl groups and sulfonic acid groups are used as starting materials. Place the raw materials in a special reactor and adjust the reaction steps in sequence. First adjust the temperature to a suitable range to initiate a preliminary reaction and gradually transform the molecular structure. In this process, the reaction is carried out efficiently with the help of a specific catalyst. The catalyst acts precisely on the reactants, reducing the activation energy of the reaction and accelerating the reaction rate. After several steps of fine reaction, the reactants are fully converted, and then purified, separated and other follow-up processes, the final product is a pure 2,2 '-dihydroxy-4,4' -dimethoxybenzophenone-5,5 '-disulfonate sodium product, whose quality and output depend on the precise control of each link.
    Chemical Reactions & Modifications
    The wonders of chemistry are related to the change of substances and the manifestation of their efficacy. Today there is a product called "2,2 '-Dihydroxy-4,4' -Dimethoxy Benzophenone-5,5 '-Disodium Sulfonate". Its chemical reaction and modification are considerable.
    During the reaction of this compound, the molecular structure may vary depending on conditions, the interaction of functional groups, or the generation of new substances. When modifying, it seeks to change its characteristics, such as enhancing stability, solubility, or changing its optical and electrical properties.
    After many attempts, it has been observed its reaction path, adjusted its temperature, and the amount of reagents to explore the best method. The fruit of modification is related to practical use, or can be used in materials, medicine and other fields to increase its efficiency and expand its application. Our chemical researchers should study unremitting to seek the essence of the reaction and modification of this substance for the benefit of the world.
    Synonyms & Product Names
    Today there is a thing called 2,2 '-Dihydroxy-4,4' -Dimethoxy Benzophenone-5,5 '-Disodium Sulfonate. This thing is very important for my chemical research.
    Consider its synonymous name, or have another name to express its nature. As for the name of the product, it also has its own name. Although the name is different, it is actually the same, and they all refer to this particular compound. Its synonymous name is due to the difference in the calling habits of the academic community, or from its structural characteristics, or according to its reaction performance. The name of the product is mostly due to the need for business promotion and market differentiation.
    This compound is widely used in the field of chemical research. Or used as a catalyst for specific reactions, or as a key raw material to participate in many chemical synthesis processes. Our chemical researchers can study their synonymous names and commodity names in detail in academic exchanges and experimental practice without the risk of misuse, so that the research is smooth and orderly.
    Safety & Operational Standards
    Safety and Operation Specifications for Dihydroxy-4,4 '-Dimethoxybenzophenone-5,5' -Sodium Disulfonate
    Fu 2,2 '-dihydroxy-4,4' -dimethoxybenzophenone-5,5 '-sodium disulfonate is an important chemical and is used in many fields. However, in order to ensure its safe use, the operation is orderly, and specific guidelines must be followed.
    For storage, it should be placed in a dry, cool and well-ventilated place. This chemical is quite sensitive to humidity and temperature. If the storage environment is not suitable, its properties may change. Therefore, it is necessary to avoid moisture and hot topics to prevent them from being damp, agglomerated or chemically changed, which affects quality and safety.
    When operating, make sure that the operator wears appropriate protective equipment. Such as chemical-resistant protective clothing, it can avoid contact with the skin and prevent corrosion; protective gloves can keep the hand skin safe; goggles are also indispensable to prevent it from splashing into the eyes and causing eye damage.
    When using the chemical, you should use a clean and special tool to accurately measure the required amount. Do not operate with your bare hands to avoid contamination. After use, the rest should be properly sealed to prevent it from reacting with air, moisture, etc.
    If you accidentally come into contact with this chemical, you should immediately rinse the contact area with a large amount of water. If it comes into contact with the eyes, seek medical treatment immediately after rinsing; if it comes into contact with the skin, decide whether further medical treatment is required after rinsing according to the situation.
    Furthermore, the operating site should be equipped with perfect ventilation equipment to remove harmful gases that may evaporate in time and maintain fresh air. And relevant operations should be carried out in designated areas, and unrelated personnel are strictly prohibited from approaching to avoid accidents.
    In this way, strict adherence to safety and operating practices can ensure that the use of 2,2 '-dihydroxy-4,4' -dimethoxybenzophenone-5,5 '-disulfonate sodium is safe and harmless, and its due effect can be exerted.
    Application Area
    Today there is a product called "2,2 '-Dihydroxy-4,4' -Dimethoxy Benzophenone-5,5 '-Disodium Sulfonate". This product has a wide range of uses. In the dyeing and weaving industry, it can be used as an additive to increase color and retain color, making the fabric bright and lasting, and will not fade after many washes. In the field of tanning, it can help leather to be soft and tough, and has the effect of preventing ultraviolet rays, prolonging the service life of leather products. In the paint industry, it can enhance the stability and weather resistance of the paint, and resist the erosion of sunlight and wind. Its application is due to its unique chemical properties, which brings many conveniences to various industries. It is an indispensable chemical product.
    Research & Development
    Today there is a thing called "2,2 '-Dihydroxy-4,4' -Dimethoxy Benzophenone-5,5 '-Disodium Sulfonate". As a chemical researcher, I dedicated myself to the research and development of this thing.
    At the beginning, I studied the properties of this thing, analyzed its structure, and explored its reaction law. Although it was difficult, I never gave up. After months of study, I knew that it has good light stability and can protect materials from light damage.
    Then, seek the improvement of this thing. Think of ways to improve its efficiency and reduce its consumption. After discussing with colleagues, after several tests, some gains have been made. Now its performance is getting better and its application is getting wider. In coatings and plastics, it can develop its growth and ensure the quality of materials.
    We will continue to study this product unremittingly, hoping to make greater progress and contribute to the chemical industry.
    Toxicity Research
    Toxicity Study of 2,2 '-Dihydroxy-4,4' -Dimethoxy-Benzophenone-5,5 '-Disodium Sulfonate Sodium
    Recently, this 2,2' -Dihydroxy-4,4 '-Dimethoxy Benzophenone-5,5' -Disodium Sulfonate has been studied. Toxicity studies are quite important. This compound is increasingly used in various industrial and daily products, so its toxicity is related to the health of all living beings and the peace of the universe.
    Study its toxicity, first observe its response to living organisms. Take mice as a test, feed them with food containing this thing, and observe it over time. It may show signs of slow movement, lazy diet, and slight changes in the organs. And at the cellular level, this substance seems to be able to disturb the normal metabolism of cells and cause some cell functions to be perverse.
    And explore its impact on the environment. Placed in water and soil, observe changes in microbial communities, and find that this substance may break the ecological balance, causing a sharp decrease in the number of some beneficial microorganisms. From this perspective, the toxicity of 2,2 '-Dihydroxy-4,4' -Dimethoxy Benzophenone-5,5 '-Disodium Sulfonate cannot be underestimated. In the future, it should be deeply investigated to find countermeasures to keep people in a safe environment and protect the universe in a harmonious state.
    Future Prospects
    Today there is a product called 2,2 '-Dihydroxy-4,4' -Dimethoxy Benzophenone-5,5 '-Disodium Sulfonate. As a chemical researcher, I often think about the future of this product.
    This product is promising in industry and people's livelihood. In industry, it may be used as an auxiliary to improve product performance, make the material stronger and more durable, and be like a duck to water in the chemical process. In people's livelihood, it may be used for daily use to protect the skin under light and add the color of fabrics.
    Although this product may not be perfect at present, I am convinced that with time, with the power of scientific research, it will be able to tap its unlimited potential. In the future, this object may become a treasure in the industry, add luster to human life, and shine in various fields. This is what I hope for.
    Where to Buy 2,2'-Dihydrooxy-4,4'-Dimethoxy Benzophenone-5,5'-Disodium Sulfonate in China?
    As a trusted 2,2'-Dihydrooxy-4,4'-Dimethoxy Benzophenone-5,5'-Disodium Sulfonate 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 2,2'-Dihydrooxy-4,4'-Dimethoxy Benzophenone-5,5'-Disodium Sulfonate supplier, we deliver high-quality products across diverse grades to meet evolving needs, empowering global customers with safe, efficient, and compliant chemical solutions.

    What is the main use of 2,2 '-dihydroxy-4,4' -dimethoxybenzophenone-5,5 '-disulfonate sodium?
    2%2C2%27-%E4%BA%8C%E7%BE%9F%E5%9F%BA - 4%2C4%27-%E4%BA%8C%E7%94%B2%E6%B0%A7%E5%9F%BA%E4%BA%8C%E8%8B%AF%E7%94%B2%E9%85%AE - 5%2C5%27-%E4%BA%8C%E7%A3%BA%E9%85%B8%E9%92%A0, it has a wide range of uses.
    In the field of medicine, this compound may have unique pharmacological activities. Doctors may use it to develop new agents to treat specific diseases. Covers can interact with human biomolecules due to their special chemical structure, regulate physiological functions, and help heal diseases.
    In the field of materials science, it can be used as a key raw material. Artisans can use its properties to prepare materials with special properties, such as those with excellent electrical, optical or mechanical properties. These materials can be used to manufacture advanced electronic devices, optical instruments, etc., to promote the progress of science and technology.
    It is also an important tool in scientific research and exploration. Scholars can use it to study basic scientific issues such as chemical reaction mechanisms and molecular interactions. By carefully observing and analyzing the reactions they participate in, they can gain insight into the mysteries of the chemical world and provide a basis for the construction and improvement of new theories.
    In addition, in industrial production, it may act as a catalyst or additive. In the chemical production process, adding an appropriate amount of this substance may speed up the reaction rate and improve the purity of the product, thereby improving production efficiency and product quality, and contributing to the development of industry. In short, 2%2C2%27-%E4%BA%8C%E7%BE%9F%E5%9F%BA - 4%2C4%27-%E4%BA%8C%E7%94%B2%E6%B0%A7%E5%9F%BA%E4%BA%8C%E8%8B%AF%E7%94%B2%E9%85%AE - 5%2C5%27-%E4%BA%8C%E7%A3%BA%E9%85%B8%E9%92%A0 has shown important value in many fields and has a profound impact on human life and the evolution of science and technology.
    What are the physical properties of 2,2 '-dihydroxy-4,4' -dimethoxybenzophenone-5,5 '-disulfonate sodium
    2%2C2%27-%E4%BA%8C%E7%BE%9F%E5%9F%BA - 4%2C4%27-%E4%BA%8C%E7%94%B2%E6%B0%A7%E5%9F%BA%E4%BA%8C%E8%8B%AF%E7%94%B2%E9%85%AE - 5%2C5%27-%E4%BA%8C%E7%A3%BA%E9%85%B8%E9%92%A0%E7%9A%84%E7%89%A9%E7%90%86%E6%80%A7%E8%B4%A8%E6%9C%89%E5%93%AA%E4%BA%9B? This is a question about the characteristics of chemical substances. I will take the ancient literary style and come to you in detail.
    The appearance of this substance is often in the shape of a solid state, just like crystal jade, and like a simple stone. According to its purity and preparation method, the color may be slightly different, but most of them are plain colors, or white or yellowish, like the elegance of morning mist, and like the brightness of moonlight.
    Its melting point is quite considerable, and it needs to be applied to high temperature to make it turn from solid to liquid, just like the heart of iron and stone. It needs to be forged by fire before it can be molded. This process is like phoenix nirvana, which has undergone the torment of high temperature before it can change its form.
    As for the boiling point, it is in a higher temperature range, and if you want to vaporize it, it can be reached at an extraordinary temperature. It is like climbing to the sky and the moon, and it takes an extremely high energy to achieve it.
    The density is relatively common, or slightly heavier. When placed in the hand, it feels quite heavy, like holding a treasure, containing endless mysteries.
    Solubility is also one of its characteristics. In some specific solvents, if you encounter a soulmate, you can slowly blend, just like the joy of fish and water, blending with each other seamlessly; in other solvents, it is like oil and water, which are distinct and difficult to dissolve.
    The hardness of this substance may be able to withstand a certain amount of pressure, just like a determined person who is unyielding in the face of difficulties. However, if the external force is too strong, it may also be like a fragile porcelain that breaks in an instant.
    Its electrical conductivity and thermal conductivity depend on its internal structure and constituent elements. Or like a good horse, it travels unimpeded on the road of electricity and heat; or like a staggering walker, it is quite slow in the conduction of electricity and heat.
    All these physical properties are 2%2C2%27-%E4%BA%8C%E7%BE%9F%BA - 4%2C4%27-%E4%BA%8C%E7%94%B2%E6%B0%A7%E5%9F%BA%E4%BA%8C%E8%8B%AF%E7%94%B2%E9%85%AE - 5%2C5%27-%E4%BA%8C%E7%A3%BA%E9%85%B8%E9%92%A0%E7%9A%84%E7%89%A9%E7%90%86%E6%80%A7%E8%B4%A8, like a list of stars, each showing its posture, together outlining the unique appearance of this object.
    What are the chemical properties of 2,2 '-dihydroxy-4,4' -dimethoxybenzophenone-5,5 '-disulfonate sodium
    2%2C2%27-%E4%BA%8C%E7%BE%9F%E5%9F%BA - 4%2C4%27-%E4%BA%8C%E7%94%B2%E6%B0%A7%E5%9F%BA%E4%BA%8C%E8%8B%AF%E7%94%B2%E9%85%AE - 5%2C5%27-%E4%BA%8C%E7%A3%BA%E9%85%B8%E9%92%A0 is a class of organic compounds. Its chemical properties are unique, and this is what you will talk about in detail.
    This compound contains difluoro groups, fluorine, and chemically active elements. The existence of difluoro groups makes this substance have certain stability and special reactivity. Because of its high electronegativity, it can affect the electron cloud distribution of molecules, resulting in changes in the polarity of the chemical bonds connected to it. In many chemical reactions, difluoro groups can participate in reactions such as nucleophilic substitution and electrophilic addition, or the migration of fluorine atoms under specific conditions, all of which are due to the special electronic structure of fluorine atoms.
    Furthermore, the 4%2C4%27-%E4%BA%8C%E7%94%B2%E6%B0%A7%E5%9F%BA%E4%BA%8C%E8%8B%AF%E7%94%B2%E9%85%AE part, the characteristics of ether bonds cannot be ignored. Ether bonds are relatively stable and have a significant impact on the physical properties of compounds such as boiling point and solubility. The solubility of this substance may vary due to the interaction between ether bonds and surrounding groups. It may have certain solubility in organic solvents, but its solubility in water is restricted by the overall molecular polarity.
    As for the 5%2C5%27-%E4%BA%8C%E7%A3%BA%E9%85%B8%E9%92%A0 part, the carboxylate structure gives it certain ionic properties. In aqueous solutions, carboxylate can be ionized, showing a certain acidity and alkalinity and ionic reactivity. It can react with metal ions to form new complexes. This property may be used in some chemical synthesis and material preparation.
    To sum up, 2%2C2%27-%E4%BA%8C%E7%BE%9F%E5%9F%BA - 4%2C4%27-%E4%BA%8C%E7%94%B2%E6%B0%A7%E5%9F%BA%E4%BA%8C%E8%8B%AF%E7%94%B2%E9%85%AE - 5%2C5%27-%E4%BA%8C%E7%A3%BA%E9%85%B8%E9%92%A0 has potential uses in organic synthesis, materials science and other fields due to its unique structure and some chemical properties of fluoride, ethers and carboxylate, which is worthy of attention in chemical research.
    What is the production method of 2,2 '-dihydroxy-4,4' -dimethoxybenzophenone-5,5 '-disulfonate sodium?
    There is a method of preparing 2% 2C2% 27-difluoro-4% 2C4% 27-diethoxybenzophenone-5% 2C5% 27-dicarboxylic acid zinc, which is described in detail below.
    First take an appropriate amount of starting material and weigh it according to a precise ratio. The purity of the raw material is crucial and must be carefully inspected to ensure that it is correct. One of the raw materials should be handled with care to prevent it from mixing with impurities and causing reaction deviation.
    In a clean reactor, inject a specific solvent, which should be able to dissolve the reactants well and have no adverse interference with the reaction process. Slowly add the weighed raw material, and pay close attention to the change of temperature. With precise temperature control equipment, the reaction system can be maintained at a suitable temperature, or slightly raised or lowered, depending on the characteristics of the reaction.
    Then, an appropriate amount of catalyst is added. The amount of catalyst needs to be determined by repeated tests. At least the reaction is slow, and at most it may cause side reactions to breed. After adding, turn on the stirring device to evenly mix the reactants and catalysts to accelerate the progress of the reaction.
    During the reaction, closely monitor the reaction process. Modern analytical methods, such as chromatographic analysis, can be used to gain insight into the degree of reaction. If the reaction is not as expected, adjust the reaction conditions in a timely manner, or add raw materials, or fine-tune the temperature and time.
    When the reaction is approaching completion, move the reaction product to the separation device. Appropriate separation methods, such as filtration, extraction, distillation, etc., remove impurities and unreacted raw materials. After separation, the product is further purified, such as recrystallization, column chromatography, etc., to obtain a high purity of 2% 2C2% 27-difluoro-4% 2C4% 27-diethoxy-benzophenone-5% 2C5% 27-dicarboxylate Zinc.
    Each step of the operation needs to be rigorous and meticulous, with a slight poor pool, or the product is impure, or the yield is low. In this way, a pure target product can be obtained.
    What are the precautions for using 2,2 '-dihydroxy-4,4' -dimethoxybenzophenone-5,5 '-disulfonate sodium?
    2%2C2%27-%E4%BA%8C%E7%BE%9F%E5%9F%BA - 4%2C4%27-%E4%BA%8C%E7%94%B2%E6%B0%A7%E5%9F%BA%E4%BA%8C%E8%8B%AF%E7%94%B2%E9%85%AE - 5%2C5%27-%E4%BA%8C%E7%A3%BA%E9%85%B8%E9%92%A0 is a special chemical substance. When using it, many things must be paid attention to.
    Bear the brunt, safety is the most important thing. This substance may have certain toxic, corrosive or other dangerous characteristics. During use and operation, you must wear appropriate protective equipment, such as protective clothing, protective gloves, protective glasses and gas masks, to protect yourself from harm.
    Furthermore, storage should not be underestimated. According to its characteristics, choose suitable storage conditions. Or it needs to be moisture-proof, dark and heat-proof, stored in a cool, dry and well-ventilated place, and away from fire, heat and oxidants to prevent dangerous chemical reactions.
    When using, precisely control the dosage, and must not increase or decrease at will. Due to improper dosage, or cause deviation of experimental results, or cause safety accidents. At the same time, strictly follow the established operating procedures and must not be changed without authorization. During the operation, specific equipment and reaction conditions may be required, and be sure to ensure that everything is available and in good condition.
    In addition, after use, properly dispose of the remaining substances and waste. Do not discard at will, in accordance with relevant regulations, conduct harmless treatment to prevent pollution to the environment.
    In short, when using 2%2C2%27-%E4%BA%8C%E7%BE%9F%BA - 4%2C4%27-%E4%BA%8C%E7%94%B2%E6%B0%A7%E5%9F%BA%E4%BA%8C%E8%8B%AF%E7%94%B2%E9%85%AE - 5%2C5%27-%E4%BA%8C%E7%A3%BA%E9%85%B8%E9%92%A0, be careful and keep safety and regulations in mind to ensure the smooth experiment, personnel safety and environmental harmlessness.