Sodium Dichloroisocyanurate

Product Details

CasNo： 2893-78-9

MF： C3Cl2N3NaO3

Appearance： powder

Delivery Time： 15 days

Packing： 25kg/drum

Purity： 99%

Product Details of Sodium Dichloroisocyanurate​

1. Basic Information​

• English Name: Sodium Dichloroisocyanurate​

• Synonyms: SDIC, DCCNa, Euchlorine, etc.​

• CAS No.: 2893 - 78 - 9​

• Molecular Formula: C₃Cl₂N₃NaO₃​

• Molecular Weight: 219.946​

2. Physical and Chemical Properties​

• Appearance: White crystalline powder, with a chlorine - like odor.​

• Melting Point: 225℃​

• Density: Approximately 1.2g/cm³​

• Solubility: Highly soluble in water, with a solubility of 30g/100mL at 25℃. The aqueous solution is weakly acidic.​

• Stability: Relatively stable. The dry powder can be stored for a long time. However, under high - temperature and humid conditions, the available chlorine content may decrease slightly. Usually, the loss of available chlorine is about 1% when stored under such conditions, and it only decreases by 0.16% after being stored indoors for half a year.​

• Available Chlorine Content: Generally ranges from 60% to 65%.​

3. Preparation Methods​

3.1 Sodium Isocyanurate Method​

Cyanuric acid and caustic soda are formulated into sodium cyanurate di - salt at a ratio of 1:2 (molar ratio). Then, chlorine gas is introduced for a chlorination reaction to generate a dichlorocyanuric acid slurry. After centrifugal separation, wet dichlorocyanuric acid is obtained. This is then put into the mother liquor of sodium dichloroisocyanurate, and caustic soda is added dropwise at a ratio of 1:1 (molar ratio) for a neutralization reaction. After the reaction is completed, the product is cooled, crystallized, and filtered to obtain wet sodium dichloroisocyanurate, which is dried to get sodium dichloroisocyanurate or its di - hydrate product.​

3.2 Sodium Hypochlorite Method​

Chlorine gas reacts with caustic soda to produce a sodium hypochlorite solution with a concentration of 10% - 11%. Then, sodium hypochlorite and isocyanuric acid undergo a chlorination reaction to generate sodium dichloroisocyanurate and sodium chloride products. During the reaction, the pH value can be controlled by supplementing chlorine gas. In this way, the sodium hydroxide generated by the reaction can react with chlorine gas to form sodium hypochlorite, which continues to participate in the reaction, making full use of the reaction raw materials. However, since chlorine gas is involved in the chlorination reaction, strict control of the raw material cyanuric acid and reaction conditions is required; otherwise, an explosion accident of nitrogen trichloride is likely to occur. Another way is to use inorganic acids (such as hydrochloric acid) for neutralization. This method does not involve direct participation of chlorine gas in the reaction, so the operation is easier to control, but the utilization of the raw material sodium hypochlorite is not complete.​

3.3 Isocyanuric Acid Metathesis Method​

Sodium salt reacts with chlorine gas at a certain temperature for a chlorination reaction to generate trichloroisocyanuric acid, which is then centrifugally filtered to obtain wet trichloroisocyanuric acid. Trichloroisocyanuric acid, cyanuric acid, and sodium hydroxide solution are subjected to a metathesis reaction at a ratio of 2:1:3 (molar ratio) at 30 - 40℃. After cooling, crystallization, filtration, and drying, powdery sodium dichloroisocyanurate product is obtained.​

4. Product Uses​

4.1 Disinfection and Sterilization​

• Widely used in various fields: It is extensively used for disinfection in drinking water, swimming pool water, industrial circulating water, food processing, and public places. It can also be applied to sericulture and aquaculture for sterilization and disinfection. It has a strong ability to kill various bacteria, fungi, viruses, etc. For example, in drinking water disinfection, it can quickly inactivate pathogenic microorganisms, ensuring the safety of drinking water. In swimming pool water treatment, it can not only kill bacteria and viruses but also keep the water clear and free of algae growth.​

• Specific applications in different industries:​

• Food industry: Used for the disinfection of food processing equipment, containers, and work areas in dairy factories, breweries, and other beverage factories. It can effectively eliminate bacteria and viruses, prevent food contamination, and ensure food safety. In the catering industry, such as cold drink shops, teahouses, and restaurants, it is used to disinfect tableware, trays, and tablecloths, maintaining good hygiene and preventing the spread of diseases.​

• Medical and public health: Can be used for the disinfection of hospital environments, including patient rooms, operating rooms, and medical equipment. It also plays an important role in the disinfection of public places such as schools, hotels, and shopping malls, helping to prevent the spread of infectious diseases.​

• Aquaculture: Effective in preventing fish diseases. It can quickly kill bacteria, fungi, and other microorganisms in water, and also has a certain effect on preventing viral diseases of fish. It is commonly used for water body disinfection in the aquaculture of fish, shrimp, crabs, and frogs, as well as for the disinfection of fish seeds and fishing gear.​

• Sericulture: As a disinfectant for silkworm rooms, silkworm utensils, and silkworm bodies. Spraying or fumigating with a disinfectant aqueous solution containing sodium dichloroisocyanurate can effectively kill viruses, fungi, and bacteria that affect silkworms, and has a significant effect on preventing silkworm diseases. Compared with traditional silkworm disinfectants, it has advantages such as high solubility, good stability, and long - lasting efficacy.​

4.2 Wool Anti - shrink Treatment​

The aqueous solution of sodium dichloroisocyanurate can evenly release hypochlorous acid, which reacts with the protein molecules in the wool scale layer, breaking some of the bonds in the wool protein molecules, thereby achieving the effect of preventing wool shrinkage. In addition, when used to treat wool products, it can also prevent the "pilling" phenomenon during wool washing. Wool fabrics treated with sodium dichloroisocyanurate have bright colors and good hand feel, and basically do not shrink. Adding a 2% - 3% sodium dichloroisocyanurate solution and other auxiliaries to impregnate wool or wool - blended fibers and fabrics can effectively prevent pilling and felting of wool and its products.​

4.3 Textile Industry Bleaching​

In the textile industry, it is mainly used as a bleaching agent for natural fibers and synthetic fibers. In water, sodium dichloroisocyanurate can produce hypochlorous acid. Hypochlorous acid can react with the conjugated bonds of chromophores in fibers through an addition reaction, changing the wavelength of light absorption by the fibers and destroying the pigments in the fibers, thus achieving the purpose of bleaching. Compared with traditional bleaching agents, it has many advantages. Traditional bleaching agents can only be used at low temperatures because high temperatures will accelerate the destruction of the fiber molecular structure, resulting in a rapid decrease in fiber strength. However, sodium dichloroisocyanurate can achieve good bleaching effects even at low temperatures. Moreover, it has a slow destruction rate of the molecular structure of natural and synthetic fibers, good bleaching results, and little impact on fiber strength. In addition, adding sodium dichloroisocyanurate to bleaching agents can also improve the hydrophilicity of clothing, remove cotton pulp from clothing, reduce the degradation rate of cellulose, and improve the flexibility and extensibility of clothing.​

4.4 Other Uses​

• Rubber Chlorinating Agent: It can be used as a chlorinating agent in the rubber industry, participating in certain rubber - related chemical reactions to improve the performance of rubber products.​

• Additive in Detergents: Adding it to detergents such as washing powder can endow detergents with bleaching and bactericidal functions, especially showing excellent cleaning effects on stains containing protein and fruit juice.​

5. Packaging and Storage​

5.1 Packaging​

Common packaging includes 25 - kg plastic - woven bags, 25 - kg or 50 - kg plastic drums, 50 - kg cardboard drums, etc. Customized packaging can also be provided according to user requirements.​

5.2 Storage​

It should be stored in a cool, dry, and well - ventilated warehouse, away from fire sources and heat sources. Avoid storing it together with easily oxidizable substances, ammonia, ammonium salts, etc.​

6. Safety Precautions​

The aqueous solution of sodium dichloroisocyanurate has certain irritating effects on the skin and mucous membranes, and the irritating odor it emits may also cause damage to the respiratory tract. Appropriate protective measures should be taken when using it, such as wearing protective gloves, masks, and goggles to avoid direct contact with the skin, eyes, and respiratory tract.​