2,2'-(1,4-Phenylene)bis[1H-benzimidazole-4,6-disulfonic acid], disodium salt

This is the problem of 2,2 '- (1,4-phenylene) bis [1H-benzimidazole-4,6-disulfonic acid] disodium salt. This compound is connected by phenylene to two benzimidazole structures, and the 4,6 sulfonate groups of benzimidazole are in the state of sodium salt. Looking at its structure, 1,4-phenylene groups span the center, such as a bridge bond, and the benzimidazole rings on both sides extend symmetrically like wings. The benzimidazole ring has a conjugated system, giving it unique electronic properties. The sulfonic acid group adds its hydrophilicity, and after forming a sodium salt, it increases water solubility and ionic properties. This structure is suitable for specific fields, such as the preparation of certain materials or chemical analysis, or it has unique functions, allowing it to interact with other substances due to its structural characteristics and develop unique chemical properties.

2%2C2%27-%281%2C4-Phenylene%29bis%5B1H-benzimidazole-4%2C6-disulfonic + acid% 5D% 2C disodium salt, Chinese name or 2,2 '- (1,4-phenylene) bis [1H-benzimidazole-4,6-disulfonic acid] disodium salt. The physical properties of this substance are as follows:
From the perspective of
, it is often powdery or crystalline solid, with a white to quasi-white color, fine and uniform. Its stability is very important. Under conventional environmental conditions, if there is no extreme temperature and humidity, light and chemical reaction, its properties are relatively stable and it is not easy to decompose by itself.
In terms of solubility, it shows a certain solubility in water and can interact with water molecules to form a uniform dispersion system. This property makes it a basic condition in various applications of aqueous systems. However, in organic solvents such as ethanol and ether, the solubility is poor, and it is difficult to dissolve well with organic solvents.
Melting point is also a key physical property. The specific value of its melting point can be obtained by experimental measurement. This value is of great significance for the study of the physical state transformation of the substance during heating. Under a specific temperature, the substance transitions from solid to liquid. This transition temperature point is crucial for the control of the ambient temperature of its processing and use.
In addition, its density cannot be ignored. The density indicates the mass of the substance per unit volume, which affects its distribution and mixing behavior in various systems. Through accurate measurement, its density parameters can be clarified, providing an accurate basis for the measurement, proportioning and other operations in practical applications.

2%2C2%27-%281%2C4-Phenylene%29bis%5B1H-benzimidazole-4%2C6-disulfonic + acid% 5D% 2C disodium salt, that is, 2,2 '- (1,4-phenylene) bis [1H-benzimidazole-4,6-disulfonic acid] disodium salt, which has a wide range of uses.
In the dyeing and weaving industry, it can be used as a dye aid. Due to its unique molecular structure, it can be closely linked to fibers, which makes dyes more fixed, improves dyeing fastness, and the color is more fresh and lasting. Fabrics are helped by it to last for a long time, and the color is not bad.
In the paper industry, it is also useful. It can optimize paper performance, enhance paper strength and whiteness. After addition, the bond between the paper fibers is more stable, the texture is tough, and the optical properties of the paper are improved, making the paper look better.
In the field of chemical synthesis, it is often used as an intermediate. With its special chemical activity, it participates in the synthesis of a variety of complex compounds, laying the foundation for the preparation of new functional materials, and expanding the category and application of chemical products.
In scientific research experiments, because of its clear characteristics, it can be used as an analytical reagent to help researchers accurately determine and analyze specific substances, providing a powerful tool for scientific research exploration.
In summary, 2,2 '- (1,4-phenylene) bis [1H-benzimidazole-4,6-disulfonic acid] disodium salts play an important role in many industries, promoting technological development and product optimization in various industries.

To make 2%2C2%27-%281%2C4-Phenylene%29bis%5B1H-benzimidazole-4%2C6-disulfonic + acid% 5D% 2C disodium salt, the method is as follows:
First take an appropriate amount of 1,4-phenylenediamine, place it in a clean reactor, add an appropriate amount of solvent, such as N, N-dimethylformamide, stir to dissolve. In this solution, slowly add phthalic anhydride, the molar ratio of the two should be carefully prepared, usually about 1:2. After adding, heat up to 150-180 ° C, and continue to stir at this temperature for 8-12 hours, so that the two are fully condensed to produce 2,2 '- (1,4-phenylene) dibenzimidazole.
After the above reaction is completed, the reaction system is cooled to 80-90 ° C. Slowly add fuming sulfuric acid dropwise. The amount of fuming sulfuric acid needs to be precisely controlled according to the stoichiometry of the reaction. The dropwise addition process must be careful to prevent the reaction from being too violent. After the dropwise addition is completed, continue to stir the reaction at this temperature for 10-15 hours so that the sulfonation reaction can be fully carried out to obtain 2,2 '- (1,4-phenylene) bis [1H-benzimidazole-4,6-disulfonic acid].
Then, slowly pour the reaction solution into a large amount of ice water and stir well. At this time, the product will precipitate in solid form. The solids are collected by filtration and washed repeatedly with deionized water until the lotion is neutral to remove excess acids and impurities.
Finally, place the resulting solids in an appropriate amount of sodium hydroxide solution, adjust the pH to 8-9, so that the solids can fully react to form the corresponding sodium salt, that is, 2%2C2%27-%281%2C4-Phenylene%29bis%5B1H-benzimidazole-4%2C6-disulfonic + acid% 5D% 2C disodium salt. After the reaction is completed, the solution is concentrated, crystallized, filtered and collected crystals, and the pure target product is obtained after drying. The whole process needs to pay attention to the precise control of reaction temperature, material ratio and reaction time to ensure the purity and yield of the product.

2%2C2%27-%281%2C4-Phenylene%29bis%5B1H-benzimidazole-4%2C6-disulfonic + acid% 5D% 2C disodium salt, the Chinese name is roughly 2,2 '- (1,4-phenylene) bis [1H-benzimidazole-4,6-disulfonic acid] disodium salt. This product has many precautions during use and needs to be treated with caution.
First, safety protection must not be forgotten. This substance may be irritating, touch the skin, eyes, or cause discomfort. When using, wear appropriate protective equipment, such as gloves, protective glasses, and lab clothes. If you come into contact, rinse with plenty of water quickly and seek medical attention if necessary.
Second, storage conditions must be appropriate. Keep in a dry, cool and well-ventilated place, away from heat sources and open flames. Improper storage or cause its properties to change, affecting the use effect.
Third, the operation specification is very important. The place of use should be well ventilated to avoid dust diffusion. When weighing and transferring, the action should be slow to prevent the powder from flying. If used in the solution, reagents should be added in the correct order, fully stirred to ensure uniform dissolution.
Fourth, the disposal of waste also requires compliance. After use, the residue should not be discarded at will, and should be disposed of in accordance with relevant regulations to prevent pollution of the environment.
In short, the use of 2,2 '- (1,4-phenylene) bis [1H-benzimidazole-4,6-disulfonic acid] disodium salt must strictly abide by safety rules and operation guidelines to ensure the safety of personnel and the smooth production of experiments.