Sodium 4-[(E)-(2-Hydroxynaphthalen-1-Yl)Diazenyl]Benzenesulfonate

Sodium-4- [ (E) - (2-hydroxynaphthalene-1-yl) azo] benzenesulfonate, which is widely used in industry, scientific research and other fields.
In the dye industry, it is often used as a key dye intermediate. Through delicate chemical synthesis, a wide range of colorful and fastness dyes can be derived from this material. These dyes are widely used in fabric dyeing processes. Whether it is natural fibers such as cotton and linen silk, or man-made fibers such as polyester and nylon, they can be dyed with rich colors. After many washes and lighting, the colors are still as bright as ever.
In the field of analytical chemistry, this substance also has important uses. Due to its special chemical structure and the properties of azo groups, it can react specifically with specific metal ions to form complexes with bright colors. According to this characteristic, analytical chemists can use colorimetry or spectrophotometry to accurately determine the concentration of metal ions in solution. For example, quantitative analysis of metal ions such as lead, cadmium, and zinc cannot be separated from this material.
Furthermore, in the field of biological research, it may serve as a biological dye. With the characteristics of combining with specific biomacromolecules (such as proteins, nucleic acids, etc.) in an organism, and showing a unique color change after binding, researchers can use microscopes and other observation equipment to clearly observe the distribution, positioning, and interaction of biomacromolecules in cells, opening up a broad path for biological research and assisting researchers in exploring the mysteries of life.

Sodium + 4 - [ (E) - (2 - Hydroxynaphthalen - 1 - Yl) Diazenyl] Benzenesulfonate is an organic compound commonly known as 4 - [ (E) - (2 - Hydroxynaphthalen - 1 - yl) azo] benzenesulfonate. This substance has the following physical properties:
- ** Appearance **: Usually powdery, orange-red to dark red in color. The powder is fine in texture, usually has good fluidity, and is easy to handle and transport in many industrial applications.
- ** Solubility **: Shows good solubility in water. Because its molecular structure contains a sodium sulfonate group, this group is hydrophilic and can form a strong interaction with water molecules, which in turn causes the compound to dissolve rapidly and form a uniform solution. However, its solubility in organic solvents is relatively limited, especially non-polar organic solvents such as hexane and benzene, because the polarity of the compound does not match the properties of non-polar solvents.
- ** Melting Point and Boiling Point **: The melting point is relatively high, and specific conditions are required to achieve the transformation of the state. The exact melting point varies slightly depending on the specific purity and measurement method, and is roughly in a certain temperature range. The boiling point is also quite high, and a higher temperature is required to reach its boiling state. This characteristic makes it a stable solid state under general environmental conditions.
- ** Density **: It has a specific density value, and the mass per unit volume is relatively stable in the solid state. This density value is of great significance for material measurement and formulation design in related industrial applications.
- ** Stability **: In the environment of normal temperature and pressure, the compound has good stability and can be stored for a long time without significant decomposition or deterioration. However, under extreme conditions such as high temperature, high humidity or strong light irradiation, its structure may gradually change, and the azo group may decompose or undergo other chemical reactions, affecting its properties.
In summary, the physical properties of sodium 4- [ (E) - (2-hydroxynaphthalene-1-yl) azo] benzenesulfonate make it unique in dyes, pigments and other chemical fields.

Sodium-4- [ (E) - (2-hydroxy naphthalene-1-yl) diazo] benzene sulfonate, which is an organic compound. It has unique chemical properties, which allow me to tell you about it.
Looking at its structure, it is composed of sodium ions and specific organic anions. Among them, the [ (E) - (2-hydroxy naphthalene-1-yl) diazo] benzene sulfonate part contains naphthalene ring, hydroxy group, diazo group and benzene sulfonate group. Hydroxy groups can cause the formation of hydrogen bonds between molecules, which has an important effect on solubility and intermolecular interactions, or can increase its solubility in polar solvents.
The diazo group is active, which is the key reaction check point of this compound. Diazo groups often have high reactivity and are easy to participate in many chemical reactions, such as coupling reactions, which can be combined with other organic molecules to construct complex organic structures, which is of great significance in the field of organic synthesis.
The benzene sulfonic acid group is strongly acidic, which makes the compound have a certain water solubility, and can ionize sulfonic acid ions in solution, showing salt properties and can undergo ion exchange reactions with a variety of metal ions.
Furthermore, this compound may have potential applications in photochromic, fluorescence and other fields because it contains multiple conjugated systems, such as naphthalene ring and benzene ring, or has special optical properties. Its conjugated structure can absorb light of specific wavelengths, initiate electron transitions, and produce unique optical phenomena.
In summary, sodium-4- [ (E) - (2-hydroxynaphthalene-1-yl) diazo] benzene sulfonate has broad application prospects in many fields such as organic synthesis and materials science due to its special structure, both active reactivity, certain solubility and potential optical properties.

When preparing (E) - (2-hydroxynaphthalene-1-yl) diazobenzenesulfonic acid tetrasodium salt, many things need to be paid attention to.
First, the purity of the raw materials is crucial. Raw materials such as 2-hydroxynaphthalene and benzenesulfonic acid must be pure. If impurities exist, they will affect the purity and yield of the product. For example, impurities participate in the reaction, or cause side reactions to occur, forming impurities, interfering with subsequent separation and purification.
Second, the reaction conditions need to be precisely controlled. The diazotization reaction is extremely sensitive to temperature and is generally suitable for low temperature (such as 0-5 ° C). If the temperature is too high, the diazonium salt is unstable and easy to decom At the same time, the pH of the reaction system is also critical. Different reaction stages require different pH values, which need to be precisely adjusted according to the reaction process.
Third, the stability of intermediates should not be underestimated. Diazonium salts, as reaction intermediates, are active in nature and have poor stability. They should be used for subsequent reactions as soon as possible after preparation to avoid long-term placement to prevent decomposition.
Fourth, the separation and purification steps are complicated. The product may contain impurities such as unreacted raw materials and by-products. Appropriate separation methods, such as crystallization, extraction, chromatography, etc., need to be selected to obtain high-purity products.
Fifth, safety issues must not be forgotten. The diazotization reaction involves toxic and harmful chemicals, such as sodium nitrite. Safety procedures should be strictly followed during operation, and the operation should be well ventilated. Protective measures should be taken to prevent poisoning and other safety accidents. Only careful operation in all links can ensure the smooth preparation process and obtain the ideal product.

This is (E) -2-hydroxy naphthalene-1-yl diazobenzenesulfonic acid, sodium, and its market price is difficult to break. The price of this product is determined by many factors, such as the purity, the difference between manufacturers, the amount of purchase, and the situation of market supply and demand.
If the purity is quite high, and it comes from a well-known large factory, coupled with strong market demand and scarce supply, the price will be high; on the contrary, if the purity is average, there are many manufacturers and sufficient supply, and the demand is normal, the price may be relatively easy.
In the chemical raw material market, the price of such fine chemicals fluctuates greatly. To know the exact market price, consult chemical product suppliers, browse professional chemical product trading platforms, or consult industry experts to obtain more accurate price information and gain insight into the ups and downs of market prices.