C.I. Direct Red 83Copper(2+) Sodium 4-Oxido-7-[({5-Oxido-6-[(E)-(2-Oxido-5-Sulfonatophenyl)Diazenyl]-7-Sulfonatonaphthalen-2-Yl}Carbamoyl)Amino]-3-[(E)-(2-Oxido-5-Sulfonatophenyl)Diazenyl]Naphthalene-2-Sulfonate (2:4:1)

C.I. Direct Red 83 is mainly used for dyeing cotton, viscose fibers and their fabrics. It can also be used for dyeing silk, wool and nylon. It is used for paper dyeing in the paper industry, and can also be used for coloring leather, biology, wood, etc. The following is explained in the form of ancient classical Chinese:
C.I. Direct Red 83, its use is quite extensive. In the field of textile printing and dyeing, it is often used to dye cotton, viscose fibers and their fabrics. Cotton is simple and durable. After dyeing with this dye, the color is bright and good; viscose fiber is soft and smooth. After this color, it adds its brilliance.
The genus of silk and wool can also use this dye. Silk is inherently shiny, and the color is warmer after dyeing; wool has a thick texture and is dyed with direct red 83, which is full of color and rich in texture. Nylon material, through its dyeing, can obtain the desired color to meet the color needs of different fabrics.
In the paper industry, this dye is also useful, which can make paper bright colors to meet the color decoration needs of various paper products.
In addition, when leather is dyed, C.I. Direct Red 83 can give leather a unique color, adding its aesthetics and value. In the field of biological research, it can be used for the coloring of biological specimens to help researchers clearly observe. The coloring of wood can also be used to give the wood surface a unique color and enhance its decorative properties.

C.I. Direct Red 83 Copper (2 +) Sodium 4-Oxido-7- [{5-Oxido-6- [ (E) - (2-Oxido-5-Sulfonatophenyl) Diazenyl] -7-Sulfonatonaphthalen-2-Yl} Carbamoyl] Amino] -3- [ (E) - (2-Oxido-5-Sulfonatophenyl) Diazenyl] Naphthalene-2-Sulfonate (2:4:1), this is a direct dye. Its chemical properties are unique and have the following characteristics:
First, in terms of structure, it contains multiple complex groups. Such as naphthalene ring structure, which gives it a certain planar rigidity and conjugate system, which has an important impact on its color and photostability. The diazo group (-N = N-) is a key part of the chromophore group. This structure allows the molecule to absorb visible light of a specific wavelength and appear red, which plays a central role in the formation of dye color. The sulfonic acid group (-SO 🥰 Na 🥰) imparts water solubility to the dye, allowing the dye to be evenly dispersed in water, which is conducive to binding with the fiber during the dyeing process.
Secondly, in terms of solubility, due to the presence of many sulfonic acid sodium salts, the dye has good solubility in water and can form a stable and uniform solution, which is essential for it to evenly dye the fiber in the dyeing process, and can ensure a uniform dyeing effect.
Furthermore, in terms of stability, the intramolecular conjugated system and metal copper ions participate in the coordination to enhance its chemical stability. To a certain extent, it is resistant to light, acid and alkali, and can maintain color stability under various conditions, so that the dyed fabric has good color fastness.
In addition, in terms of bonding properties with fibers, the dye can firmly adhere to fibers by virtue of the interaction between sulfonic acid groups and hydroxyl groups, amino groups and other groups on the fibers, and effectively dye cellulose fibers and other materials.

C.I. Direct Red 83 is a type of dye. Its preparation process is quite complicated and requires many delicate chemical synthesis steps.
The starting material is usually an aromatic compound with a specific structure, such as aniline and its derivatives. First, the aromatic amines are converted into diazonium salts by a delicate diazotization reaction. This diazotization reaction requires precise control of the reaction temperature, pH and the proportion of reactants. Generally speaking, the temperature should be maintained in the low temperature range, about 0-5 degrees Celsius, to ensure the stable formation of diazonium salts.
Then, a coupling reaction is carried out. The resulting diazonium salt is combined with a specific coupling component, such as naphthalene phenols. In this step, the regulation of the reaction conditions is also crucial. The pH has a great impact on this reaction, and different coupling components need to match the appropriate pH range to ensure that the coupling reaction is carried out efficiently and accurately, so as to promote the successful construction of the dye molecule color system.
During the synthesis process, the purification process is indispensable. Through a series of operations such as crystallization, filtration, and washing, residual impurities, unreacted raw materials and by-products in the reaction system can be removed. In this way, the purity of C.I. Direct Red 83 can be improved, making its color purer and dyeing performance better.
The entire preparation process requires extremely high control over the reaction conditions, and any slight deviation may affect the quality and performance of the dye. From the selection of raw materials, to the fine adjustment of each step of the reaction conditions, to the final purification treatment, all require exquisite skills and rigorous attitude to produce high-quality C.I. Direct Red 83 dye.

C.I. Direct Red 83 requires careful attention when using.
The first priority is safety. This pigment may contain harmful ingredients, which can endanger health if it touches the skin, inhales dust or is swallowed by mistake. Therefore, when operating, be sure to wear protective clothing, gloves and protective masks to prevent direct contact with the body. And it should be used in a well-ventilated place. If conditions permit, it should be equipped with ventilation equipment to disperse dust and reduce the risk of inhalation.
For secondary storage, it should be stored in a cool, dry and ventilated place, away from fire and heat sources to avoid deterioration or risk of combustion. At the same time, it should be stored separately from oxidants, acids, etc. to prevent mutual reaction. The packaging must be well sealed to avoid moisture or mixing impurities to affect the quality.
In addition, it is the use specification, strictly follow the instructions of the product manual, and control the dosage and use conditions. Different application scenarios have different requirements for their concentration, temperature, time, etc., and follow the specifications to ensure the effect and quality. During use, if it needs to be prepared, it must be accurately measured to ensure that the proportion is appropriate.
After use, properly clean up the residue to avoid random discarding and polluting the environment. If used in industrial production, the generated waste needs to be treated in accordance with environmental regulations and must not be discharged illegally.
In addition, users should be aware of emergency response measures. In the event of inadvertent contact, such as skin contact, rinse with plenty of water immediately; if it enters the eyes, immediately open the eyelids and rinse and seek medical attention; if inhaled or swallowed by mistake, quickly move to a fresh air place, perform artificial respiration if necessary and send to the hospital urgently. In this way, C.I. Direct Red 83 should be used safely and standardized.

C.I. Direct Red 83 is a dye. Its impact on the environment is quite complex and cannot be ignored.
From the perspective of chemical properties, this dye may contain specific chemical groups, and some may have certain stability, which is difficult to degrade rapidly in the environment. If it flows into natural water bodies through industrial wastewater and other channels, it will cause changes in water color, affect the appearance of water bodies, and destroy the original physical characteristics of aquatic ecosystems.
It may be toxic to aquatic organisms. When aquatic organisms are exposed to water bodies containing C.I. Direct Red 83 for a long time, or interfere with their normal physiological functions. If it affects the respiration, feeding and reproduction of fish, the number of fish populations will decrease. It also has an impact on plankton, which are the foundation of aquatic ecosystems. Its impact will affect the entire food chain and trigger an ecological chain reaction.
In the soil environment, if the wastewater containing this dye is used for irrigation, the dye may accumulate in the soil, affecting the soil physical and chemical properties. Or change the soil pH, affecting the structure and function of soil microbial community. Soil microorganisms are essential to soil nutrient cycling, organic matter decomposition, etc., and their interference will affect soil fertility and plant growth.
In addition, when C.I. Direct Red 83 degrades in the environment, it may produce intermediate products, and some intermediate products are toxic or stronger, posing a more serious potential threat to the environment and organisms. And it migrates and spreads in the environment, or pollutes a wider area through atmospheric subsidence, surface runoff, etc., expanding the impact of pollution.