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Benzyldimethyldodecylammonium Chloride, abbreviated as DDBAC, is an important quaternary ammonium salt type cationic surfactant. Its molecular structure combines hydrophilicity and lipophilicity: one end is a positively charged quaternary ammonium cation (composed of a benzyl group, two methyl groups, and a decyl chain attached to the nitrogen atom), and the other end is a hydrophobic decyl long chain, while the chloride ion acts as a balancing anion. This unique dual-polarity structure enables it to effectively adsorb onto negatively charged interfaces, significantly reducing surface tension, and demonstrating outstanding bactericidal disinfection, anti-static, and softening conditioning properties. As a broad-spectrum bactericide, it can rapidly inactivate microorganisms by disrupting their cell membrane structure, causing the leakage of cellular contents, thus being widely used in medical disinfection, household cleaning, industrial water treatment, and swimming pool sterilization, etc. At the same time, its excellent surface activity also makes it a common anti-static and softening component in personal care products (such as hair conditioners, fabric softeners). DDBAC typically appears as a colorless to pale yellow transparent liquid, soluble in water and lower alcohols, with relatively stable chemical properties. However, during use, attention should be paid to its certain irritancy. At high concentrations, it may cause discomfort to the skin and eyes, and its biodegradability is limited in certain environments. In summary, DDBAC is a versatile and widely used industrial and consumer chemical compound with diverse functions, and its efficacy and safety need to be balanced under scientific guidance.
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Chemical Formula |
C21H38ClN |
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Exact Mass |
339 |
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Molecular Weight |
340 |
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m/z |
339 (100.0%), 341 (32.0%), 340 (22.7%), 342 (7.3%), 341 (2.5%) |
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Elemental Analysis |
C, 74.19; H, 11.27; Cl, 10.43; N, 4.12 |
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Synthesis of Benzyldimethyldodecylammonium chloride (DDBAC):
Dodecyl dimethyl benzyl ammonium chloride (DDBAC), a quaternary cationic surfactant, is a heterogeneous mixture of various even alkyl chain alkyl benzyl chlorides. White waxy solid or yellow colloid; The aqueous solution shows neutral or weakly basic reaction, and a large amount of foam will be produced during shaking. It is easily soluble in ethanol and acetone. Although the dissolution rate in water is slow, the aqueous solution is still preferred because it is easier to handle. The aqueous solution shall be neutral to slightly alkaline, and the color shall be colorless to light yellow. When the aqueous solution is shaken, it will produce foam, which has bitter taste and light almond taste in the thick solution. Benzalkonium chloride is a cationic surfactant. It is a non oxidizing bactericide. It has broad-spectrum and high-efficiency bactericidal and Algaecidal abilities. It can effectively control the propagation of bacteria and algae in water and the growth of slime. It also has good slime stripping effect, certain dispersion and penetration effects, and certain degreasing, deodorizing and corrosion inhibition effects.
Dodecyl dimethyl benzyl ammonium chloride (DDBAC) is a cationic surfactant and a non oxidizing fungicide with broad-spectrum and high efficiency in killing bacteria and algae. It has a wide range of applications in various fields.
(1) Sterilization and algae removal in circulating cooling water system
It plays an important role in circulating cooling water systems in industries such as petroleum, chemical, power, and textile. During the operation of circulating cooling water, factors such as water temperature and light can easily breed bacteria and algae, leading to deterioration of water quality and affecting the normal operation of equipment. It can effectively control the reproduction of bacteria and algae in water and the growth of sticky mud, and has a special effect on killing sulfate reducing bacteria. The general dosage is 50-100mg/L, and the specific dosage can be adjusted according to the actual situation. By using this substance, water quality can be kept clean, equipment lifespan can be extended, and maintenance costs can be reduced.
(2) Sterilization and prevention of bacterial blockage in oilfield water injection system
In oilfield injection wells, the growth of bacteria can cause blockages in injection pipelines, affecting the effectiveness of water injection and the efficiency of oilfield production.
Can be used as a fungicide for oilfield water injection systems to prevent bacterial growth and blockage. It can penetrate and remove slime and detach attached algae, and has good slime stripping effect. At the same time, it also has certain dispersing and penetrating effects, which can further enhance the cleaning effect and ensure the normal operation of the water injection system.
(3) Large scale chemical plant water quality sterilization and algae removal
The water quality in large-scale chemical plants also needs to be treated with sterilization and algae removal to ensure normal production. It can be used for sterilization and algae removal in large-scale chemical plants, effectively controlling the amount of bacteria and algae in water, preventing corrosion and blockage of equipment caused by bacteria and algae, and ensuring the safety and stability of chemical production.
(1) Medical disinfection
Surgical, skin, and instrument disinfection: Benzyldimethyldodecylammonium chloride (DDBAC) has broad-spectrum bactericidal ability and can effectively kill various bacteria, viruses, and fungi. In surgical procedures, it can be used for disinfection of surgical instruments and surgical sites, reducing the risk of surgical infections. For skin disinfection, it can quickly kill microorganisms on the surface of the skin and prevent wound infections.
Medical equipment disinfection: Various medical equipment in hospitals, such as endoscopes, catheters, etc., need to be disinfected regularly. It can be used as a disinfectant for medical devices, effectively removing pollutants and microorganisms on the surface of the devices, ensuring the safe use of medical devices.
(2) Disinfection of food processing equipment
The hygiene condition of equipment during food processing is directly related to the quality and safety of food. Can be used for disinfection and sterilization of food processing equipment, such as milk equipment, pipelines, and operating components in food production. It can kill bacteria and microorganisms on the surface of equipment, prevent food contamination, and ensure food safety. When in use, the substance is generally prepared into a disinfectant in a certain proportion to wipe or soak the equipment for disinfection.
(3) Disinfection of silkworm breeding sites
During the process of raising silkworms, the hygiene of the silkworm room and equipment is crucial for the growth and health of the silkworms. It can be used for disinfection of silkworm equipment in silkworm rooms, killing bacteria and pests in silkworm rooms, and providing a good growth environment for silkworms. It can effectively prevent the occurrence of silkworm diseases and improve the yield and quality of silkworm cocoons.
(4) Disinfection in the production process of sugar industry
In the sugar industry, the equipment and environment used in the production process are prone to the growth of microorganisms, which can affect the quality of sugar. Dodecyl dimethyl benzyl ammonium chloride can be used for disinfection and sterilization in the sugar industry production process, such as disinfecting equipment such as sugar juice conveying pipelines and evaporators, to prevent microbial contamination of sugar juice and ensure the quality of sugar.
(1) Fungicide and mold inhibitor
In the process of textile printing and dyeing, textiles are prone to damage from mold and bacteria, leading to problems such as mold growth and discoloration. Can be used as a bactericidal and antifungal agent in the textile printing and dyeing industry, effectively inhibiting the growth of mold and bacteria, and protecting the quality of textiles. It can be added during the pre-treatment, dyeing, and post finishing processes of textile printing and dyeing, playing a long-term role in sterilization and mold prevention.
(2) Softener
Has certain flexibility and can be used as a softener for textiles. It can reduce the friction between textile fibers, making textiles softer and smoother, and improving the comfort of textiles. At the same time, it can also improve the anti-static performance of textiles and reduce the static electricity generated during the use of textiles.
(3) Antistatic agent
In the process of textile printing and dyeing, the generation of static electricity can affect the quality and production efficiency of textiles. It can be added as an anti-static agent to the processing of textiles, neutralizing the surface charge of textiles and reducing the generation of static electricity. It can improve the processability of textiles and prevent them from adsorbing dust and impurities due to static electricity during the production process.
(4) Emulsifiers and conditioners
It has good emulsifying properties and can be used as an emulsifier for emulsifying and dispersing dyes, auxiliaries, etc. in textile printing and dyeing. It can evenly disperse dyes and auxiliaries in water, improving the dyeing and finishing effect. At the same time, it can also serve as a conditioning agent to improve the dyeing performance and hand feel of textiles.
(1) Metal corrosion inhibitor
During metal processing and storage, metals are prone to corrosion. It has a certain corrosion inhibition effect and can be used as a metal corrosion inhibitor. It can form a protective film on the metal surface, preventing the metal from coming into contact with oxygen, moisture, and other substances in the external environment, thereby slowing down the corrosion rate of the metal. For example, in the anti-corrosion of petrochemical equipment, it can be used in combination with other preservatives to improve the anti-corrosion effect of the equipment.
(2) Petroleum and chemical equipment preservatives
During the operation of petrochemical equipment, it may be corroded by various chemical substances, resulting in equipment damage. Can be used as a preservative for petrochemical equipment to prevent corrosion of the equipment. It can adsorb onto the metal surface, forming a dense protective film that effectively prevents the penetration and erosion of chemicals, extending the service life of the equipment.
(3) Silicone oil emulsifier
In the emulsification process of silicone oil, emulsifiers are needed to evenly disperse the silicone oil in water. Has good emulsifying properties and can be used as a silicone oil emulsifier. It can reduce the interfacial tension between silicone oil and water, and make silicone oil form a stable lotion, which is widely used in cosmetics, lubricants and other fields.
(4) Retarder
In the dyeing process of acrylic fibers and their knitted fabrics, in order to evenly dye the fibers with dye, Benzyldimethyldodecylammonium chloride (DDBAC) is necessary to use a dye retarder. Can be used as a retarder for acrylic fibers and their knitted fabrics, controlling the dyeing speed of dyes to make dyeing more uniform and improve dyeing quality.
(1) Ingredients of disinfectant
The main component of some multi-purpose disinfectants is dodecyl dimethyl benzyl ammonium chloride. For example, Wilux Multi purpose Disinfectant, which is extracted from natural lemon and combined with this substance, can gently kill bacteria. This disinfectant is suitable for disinfecting clothing and hard surfaces of homes, such as door handles, keyboards, floors, elevator buttons, countertops, and other household items. It can effectively clean and disinfect, block the spread of bacteria, and provide a more secure and clean environment for families. When using, for disinfecting the surface of hard objects, simply add an appropriate amount of disinfectant to water in a ratio of 1:150, wipe or soak for 15 minutes, and then rinse with clean water; For the disinfection of fabric surfaces, the disinfectant is first added to water in a ratio of 1:150, soaked for 15 minutes, and then cleaned according to the normal washing procedure.
(2) Personal care product additives
In personal care products, such as hand sanitizer, sanitary napkins, etc., they are also often used as additives. It has good sterilization and disinfection performance, which can effectively kill bacteria, viruses, and fungi, providing hygiene and safety protection. At the same time, it also has certain surface activity properties, which can improve the user experience of the product.
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