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Didecyl dimethyl ammonium chloride products, also known as didecyl dimethyl ammonium chloride, is a white solid at room temperature and pressure. Its molecular formula is C22H48ClN and CAS 7173-51-5. Can dissolve in water and polar organic solvents, but insoluble in non-polar organic solvents. This substance has stable chemical properties and is not easily decomposed. Belonging to double chain quaternary ammonium salt compounds, they are used in many products due to their bactericidal, antiviral, and bactericidal properties. From the perspective of disinfection function classification, it belongs to the category of intermediate level disinfectants and is a broad-spectrum virus disinfectant component. This type of quaternary ammonium salt disinfectant is widely used, has a mild odor, is safe, non-toxic and non irritating, can be safely used for women and infants, is soluble in water without residue, and has multiple advantages such as storage resistance. It has become the safest disinfectant and is widely accepted by people around the world. In addition, as a quaternary ammonium salt, this compound can undergo displacement reactions with some anions (such as hydroxyl ions) to form the corresponding quaternary ammonium salt.
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Chemical Formula |
C22H48ClN |
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Exact Mass |
361 |
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Molecular Weight |
362 |
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m/z |
361 (100.0%), 363 (32.0%), 362 (23.8%), 364 (7.6%), 363 (2.7%) |
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Elemental Analysis |
C, 72.98; H, 13.36; Cl, 9.79; N, 3.87 |
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There are two main routes for the synthesis of didecyl dimethyl ammonium chloride products.
① In the presence of potassium iodide, chlorodecane reacts with methylamine to produce Didecyl methyl tertiary amine, and then Didecyl methyl tertiary amine is put under pressure to react with methyl chloride in the medium of water and isopropanol under heating and pressure to produce Didecyl dimethyl ammonium chloride. The reaction formula is as follows:
② In the presence of catalyst, n-decanol was aminated with hydrogen and methylamine to produce Didecyl methyl tertiary amine. Then, add Didecyl methyl tertiary amine, a small amount of sodium carbonate and an appropriate amount of isopropanol into the pressure kettle, replace the air with nitrogen, raise the temperature to 80 ~ 90 ℃, inject methyl chloride at a pressure of 0.3 ~ 0.5MPa, and react for 3 ~ 4H to obtain Didecyl dimethyl ammonium chloride product. The reaction formula is as follows:
Didecyl Dimethyl Ammonium Chloride (DDAC) is an important quaternary ammonium salt compound with unique chemical structure and properties. Due to its excellent surface activity, bactericidal performance, and stability, bis (decaalkyl) dimethyl ammonium chloride has been widely used in multiple fields.
(1) Sterilization of oilfield reinjection water
In the process of oil field exploitation, reinjection of water is an important means to maintain oil well pressure and improve recovery rate. However, reinjection water often contains a large number of microorganisms such as bacteria and algae, which can form biofilms on the inner walls of oil wells and pipelines, causing problems such as pipeline blockage and corrosion, seriously affecting the normal production of oil fields. As an efficient fungicide, bis (decaalkyl) dimethyl ammonium chloride can effectively kill various microorganisms in the reinjection water, prevent the formation of biofilms, and ensure the normal operation of the oilfield reinjection system. Its bactericidal effect is superior to traditional fungicides such as didecyl dimethyl ammonium chloride products, which can more effectively control the growth and reproduction of microorganisms.
(2) Industrial circulating cooling water for sterilization and algae removal
The industrial circulating cooling water system in oil fields is also susceptible to microbial contamination. Microorganisms grow and reproduce in cooling water systems, forming sludge that reduces cooling efficiency and increases equipment energy consumption and maintenance costs. DDAC can be added to industrial circulating cooling water to inhibit the growth of bacteria and algae, maintain the cleanliness and good cooling performance of the cooling water. It can interact with microbial cell membranes in water, disrupt the integrity of cell membranes, and cause microbial death, thereby achieving the goal of sterilization and algae elimination.
(1) Fungicide
Disinfection and sterilization of the production environment and equipment are crucial in the pharmaceutical production process. Double dodecyl dimethyl ammonium chloride can be used as a fungicide for air disinfection in pharmaceutical production workshops, equipment surface disinfection, and sterilization treatment of production water. It can effectively kill bacteria, fungi and other microorganisms that may be introduced during the production process, ensuring the quality and safety of drugs. In addition, in some topical medications, an appropriate amount of bis (decaalkyl) dimethyl ammonium chloride is also added to exert its bactericidal and preservative effects, preventing the medication from being contaminated by microorganisms during use.
(2) Hand, skin, and mucosal disinfection
DDAC is non irritating to the skin and mucous membranes, and can be used for disinfection of hands, skin, and mucous membranes. In some special work environments or medical operations, personnel need to disinfect their hands to prevent cross infection. The disinfectant hand sanitizer containing double decyltrimethylammonium chloride has a mild formula that can effectively kill bacteria without causing harm to the skin. In oral care products such as mouthwash, DDAC may also be added to help kill bacteria in the mouth and prevent oral diseases.
Industrial circulating water treatment field
(1) Sterilization and algae killing
During the operation of industrial circulating water systems, due to factors such as water temperature and light, it is easy to breed a large number of microorganisms such as bacteria, algae, and fungi. These microorganisms will form biofilms on the inner walls of the system, reducing heat exchange efficiency, increasing pipeline resistance, and even causing equipment corrosion and leakage. DDAC can be used as a bactericidal and algicidal agent in industrial circulating water systems, regularly added to the circulating water to control the growth and reproduction of microorganisms. It can penetrate the cell wall of microorganisms, interfere with their normal physiological and metabolic processes, thereby achieving the effect of sterilization and algae elimination, ensuring the stable operation of industrial circulating water systems.
(2) Adjust water quality
In addition to its bactericidal and algaecidal effects, bis (decaalkyl) dimethyl ammonium chloride can also be used as a water treatment agent to help adjust water quality indicators such as hardness, acidity, and conductivity of industrial circulating water. It can chelate with metal ions such as calcium and magnesium in water, reducing the formation of scale and improving water quality. At the same time, it can also regulate the acidity and alkalinity of water, keeping it within an appropriate range and reducing corrosion to equipment. By adjusting the water quality, DDAC can help extend the service life of industrial circulating water systems and reduce operating costs.
Textile industry field
(1) Important components of dyes and additives
In the textile dyeing process, bis (decaalkyl) dimethyl ammonium chloride can serve as an important component of dyes and auxiliaries, enhancing the adhesion between dyes and fibers, and improving the uniformity and firmness of dyeing. It can regulate the surface charge of fibers, making it easier for dyes to adsorb on the fiber surface and evenly distribute inside the fibers, reducing color differences and spots during the dyeing process. In addition, bis (decaalkyl) dimethylammonium chloride can improve the dispersibility and stability of dyes, enhance dyeing efficiency and quality.
(2) Adjust fiber properties
Double dodecyl dimethyl ammonium chloride can alter the hydrophilicity and anti-static properties of fibers. For some synthetic fibers with poor hydrophilicity, adding double decyl dimethyl ammonium chloride can increase the hydrophilic groups on the fiber surface, improve the fiber's moisture absorption, and make the fabric more comfortable. At the same time, it can also endow fibers with good anti-static properties, reduce the problems of adsorption and entanglement caused by static electricity during processing and use, and improve the appearance quality and wearability of fabrics.
(3) Increase fabric wear resistance and wrinkle resistance
During the textile finishing process, double decyl dimethyl ammonium chloride can form a thin film on the fiber surface, increasing the wear resistance and wrinkle resistance of the fabric. This film can protect the fiber surface, reduce friction and wear between fibers, and extend the service life of the fabric. At the same time, it can enhance the bonding force between fibers, making the fabric less prone to wrinkles when subjected to external forces, and maintaining the flatness and beauty of the fabric.
(4) Antibacterial finishing
DDAC has strong bactericidal effect and can be used for antibacterial finishing of textiles. Adding antibacterial agents containing double decyl dimethyl ammonium chloride to the spinning solution to make antibacterial fibers, or performing antibacterial treatment during the fabric finishing process, can give the fabric long-lasting antibacterial properties. This antibacterial textile can effectively inhibit the growth and reproduction of microorganisms such as bacteria and mold, reduce odor production, and improve the hygiene performance of fabrics. It is widely used in underwear, bedding, infant clothing, medical textiles and other fields.
(1) Surfactant
The performance of drilling fluid is crucial for the smooth progress of drilling operations in oil fields. DDAC can be used as a surfactant to adjust the tension at the oil-water interface. During the drilling process, fluids such as oil, gas, and water in the formation come into contact with the drilling fluid, and the tension at the oil-water interface affects the fluidity of the fluid and the stability of the drilling fluid. DDAC can reduce the tension at the oil-water interface, making it easier for oil droplets to disperse in the drilling fluid, improving the rock carrying capacity and lubrication performance of the drilling fluid, reducing friction and resistance during drilling, protecting the drill bit and drilling tools, and improving drilling efficiency.
(2) Preservatives
During long-term use, drilling equipment is susceptible to corrosion from drilling fluids, formation water, and other media. DDAC has certain anti-corrosion properties and can be added to drilling fluids as a preservative. It can form a protective film on the metal surface, preventing the contact between corrosive media and metal, thereby slowing down the corrosion rate of drilling equipment, extending the service life of equipment, and reducing drilling costs.
Other fields
(1) Surface sterilization of hard objects
DDAC can be mixed with chlorine dioxide for sterilization of hard surfaces. In some places with high hygiene requirements, such as food processing workshops, hospital operating rooms, laboratories, etc., the use of this mixed disinfectant on hard surfaces such as floors, walls, and equipment surfaces can more effectively kill various pathogenic microorganisms and ensure environmental hygiene and safety.
(2) Surface coatings such as non-woven fabrics are antibacterial, mildew resistant, and resistant
Properly adding didecyl dimethyl ammonium chloride products to surface coatings such as non-woven fabrics, polyurethane, synthetic fibers, etc. can significantly increase the antibacterial and anti mold effects. In the fields of medical supplies, hygiene products, household items, etc., these products that have undergone antibacterial and anti mold treatment can better protect the health of users and reduce the risk of disease transmission caused by microbial contamination.
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