What is the chemical structure of Sodium 3 - Hydroxy - 4 - (2 - Hydroxy - 1 - Naphthylazo) -7 - Nitronaphthalene - 1 - Sulphonate?
This is the chemical name of sodium-3-hydroxy-4- (2-hydroxy-1-naphthyl azo) -7-nitronaphthalene-1-sulfonate. To clarify its chemical structure, let me explain in detail.
In this compound, the naphthalene group is the core structure. Naphthalene has two fused benzene rings, and its numbering rules are established. In the first position of the naphthalene ring, there is a sulfonate group (-SO 🥰 Na), which gives the compound a certain water solubility. At the 3rd position, it is a hydroxyl group (-OH). The oxygen of the hydroxyl group has a lone pair of electrons, which can participate in the formation of hydrogen bonds and affect the physical and chemical properties of compounds.
At the 4th position, another naphthalene fragment is connected through an azo group (-N = N -). This azo group is a chromophore, which often gives the compound color and is common in the field of dyes. The linked naphthalene group has a hydroxyl group at the 1st position, which can also participate in hydrogen bonding and other interactions.
At the 7th position, there is a nitro group (-NO _ 2). Nitro is an electron-withdrawing group, which can affect the distribution of naphthalene ring electron clouds and change the reactivity of compounds.
The structure of this compound, the mutual influence of each group, endows it with unique physical and chemical properties, and may be used in dyes, analytical reagents, etc. Because it contains azo groups that can develop color, sulfonates help to dissolve, and hydroxyl and nitro groups can participate in various reactions, it has practical value in specific fields.
What are the main uses of Sodium 3 - Hydroxy - 4 - (2 - Hydroxy - 1 - Naphthylazo) -7 - Nitronaphthalene - 1 - Sulphonate?
Sodium-3-hydroxy-4- (2-hydroxy-1-naphthyl azo) -7-nitronaphthalene-1-sulfonate, this substance has a wide range of uses. In the dyeing and weaving industry, it is often used as a dye, which can give fabrics a brilliant color. Because of its special structure, it can be combined with fabric fibers, and the dyed color is firm and bright, such as the dyeing of ancient satin, if this agent is used, it may last for a long time and the color will not fade.
In the field of analytical chemistry, it also has its uses. Because of its sensitive reaction to specific metal ions, it can be used as an indicator of metal ions. When encountering the corresponding metal ions, the color of the solution becomes clear and detectable, just like the ancient alchemists observing the changes of dansha, so as to accurately determine the existence and content of metal ions.
Furthermore, in the process of scientific research and exploration, it is often used to synthesize new compounds. Using it as a raw material, through clever chemical changes, a variety of substances with unique properties can be derived, just like building a novel castle with cornerstones, opening up new paths for the research and development of new materials, helping scientific research to move forward, and exploring more mysteries in the unknown.
What are the physical properties of Sodium 3 - Hydroxy - 4 - (2 - Hydroxy - 1 - Naphthylazo) -7 - Nitronaphthalene - 1 - Sulphonate?
Sodium-3-hydroxy-4- (2-hydroxy-1-naphthyl azo) -7-nitro-naphthalene-1-sulfonate This material has a distinct color state. It is often powdery, colorful or plain, and has a different style. In terms of solubility, it has a certain affinity for water and is soluble in it, forming a uniform liquid phase. This is due to the strong hydrophilicity of the sulfonic acid group in the molecule, which allows it to melt in the aqueous medium.
In terms of stability, under normal temperature, it is still stable, but when it encounters strong acids and bases, the structure is variable and chemical reactions occur. When the temperature rises, the stability also decreases, or decomposes or deteriorates. And it is sensitive to light, and its structure and properties gradually change if it is illuminated for a long time.
From the perspective of spectral characteristics, because it contains chromophore groups such as azo and naphthalene rings, it can show unique absorption peaks under specific wavelengths of light, which can be used for qualitative and quantitative determination in the analytical field. The physical properties of this substance are of great significance in many industrial and scientific research fields, such as printing and dyeing, which can be used as dyes; in analytical chemistry, it is an important analytical reagent.
What is the synthesis of Sodium 3 - Hydroxy - 4 - (2 - Hydroxy - 1 - Naphthylazo) -7 - Nitronaphthalene - 1 - Sulphonate?
To prepare Sodium + 3 - Hydroxy - 4- (2 - Hydroxy - 1 - Naphthylazo) -7 - Nitronaphthalene - 1 - Sulphonate, the method is as follows:
First take an appropriate amount of 2 - hydroxy - 1 - naphthylamine, in a suitable reactor, moderate dissolution in dilute acid solution, and then slowly add an appropriate amount of sodium nitrite solution, control the temperature in the low temperature range, about 0 - 5 degrees Celsius, diazotization reaction. During this period, close attention should be paid to the reaction process, and the reaction endpoint should be detected with starch-potassium iodide test paper. When the test paper turns blue and the color is stable, the diazotization reaction is completed.
Take another appropriate amount of 3-hydroxy-7-nitro-1-naphthalenesulfonic acid, place it in another container, dissolve it in an appropriate amount of alkaline solution, and adjust the pH value of the solution to a suitable range, between about 8-9.
After the diazotization reaction is completed, slowly drop the diazonium salt solution into the prepared 3-hydroxy-7-nitro-1-naphthalenesulfonic acid alkaline solution under stirring. The rate of dropwise addition should not be too fast to avoid the reaction being too violent. After the dropwise addition is completed, continue to stir the reaction for a period of time to make the reaction fully proceed. The temperature of this process also needs to be controlled, roughly maintained at 10-15 degrees Celsius.
After the reaction is completed, an appropriate amount of table salt is added to the reaction system to promote the precipitation of the product. Then the filtration operation is carried out, the filter cake is collected, and the filter cake is washed with an appropriate amount of cold water to remove impurities. Finally, the washed filter cake is dried to obtain Sodium + 3 - Hydroxy - 4 - (2 - Hydroxy - 1 - Naphthylazo) -7 - Nitronaphthalene - 1 - Sulphonate product. The whole process needs to pay attention to the precise control of the reaction conditions and the specifications of each step to obtain a pure product.
Sodium 3 - Hydroxy - 4 - (2 - Hydroxy - 1 - Naphthylazo) -7 - Nitronaphthalene - 1 - Sulphonate What should I pay attention to when using?
When using sodium-3-hydroxy-4- (2-hydroxy-1-naphthyl azo) -7-nitronaphthalene-1-sulfonate, the following matters should be paid attention to:
First, it concerns storage. This chemical should be stored in a cool, dry and well-ventilated place, away from fire and heat sources. Because of its chemical activity, improper temperature and humidity are close to the fire source, which may cause chemical changes, cause it to deteriorate and fail, and even pose a risk of safety.
Second, it concerns the access operation. When taking it, be sure to adhere to the principle of precision, take it according to the amount required for experiment or production, and avoid waste. And the tools for taking it should be clean and dry to prevent impurities from mixing and affecting the purity and performance of the substance.
Third, it is related to safety protection. This substance may be potentially harmful to the human body. When operating, you need to wear appropriate protective equipment, such as protective gloves, goggles and laboratory clothes, to prevent it from coming into contact with the skin and eyes. In case of inadvertent contact, rinse with plenty of water immediately and seek medical assistance according to the specific situation.
Fourth, it is related to environmental impact. During use, pay attention to the impact on the environment. Discarded substances must not be discarded at will, and must be properly disposed of in accordance with relevant regulations to prevent pollution of soil, water sources and other environmental factors.
Fifth, it is related to compatibility taboos. Before use, be sure to clarify its compatibility with other chemical substances, avoid mixing with taboo substances, so as not to cause dangerous chemical reactions, such as explosions and toxic gases. Only by paying careful attention to the above can sodium-3-hydroxy-4 - (2-hydroxy-1-naphthalene-azo) -7-nitronaphthalene-1-sulfonate be used safely and effectively.