Product Details


Diotyl Dimethyl Ammonium Chloride(D0821)

Diotyl Dimethyl Ammonium Chloride(D0821) for Water Treatment Chemicals is a quaternary ammonium salt that is widely used in water treatment, textile, papermaking, leather, and other industries. It has good chlorine stability and can effectively remove organic matter, colloids,s, and color from water. This product is a high-quality Diotyl Dimethyl Ammonium Chloride(D0821) for Water Treatment Chemicals sourced from China. It is available in bulk quantities at competitive prices. Companies looking to buy Diotyl Dimethyl Ammonium Chloride(D0821) for Water Treatment Chemicals in bulk should contact us today.

Product Description

CAS No. 5538-94-3

Molecular Formula: C18H40ClN

Molecular Weight: 305.97

Structural Formula:



AppearanceClear, pale yellow to straw liquidClear, pale yellow to straw liquid
Active content, %48-5278-82
PH(10% water solution)5.0-9.05.0-9.0
Free amine, %2.0max2.0max
Color (APHA)200max200max


Diotyl Dimethyl Ammonium Chloride (DDAC) is a twin-chain quaternary ammonium compound that provides controlled foam biocidal action. It has been found to exhibit low, fast-breaking foam with exceptional dynamic, controlled foam performance in FIFRA1-registered hard surface disinfectants, sanitizers, and certain types of water treatment formulations. DDAC delivers potent germicidal action against a broad spectrum of microbial organisms, including bacteria, fungi, viruses, and algae, even under heavy organic soil loads and complex water conditions.


Diotyl Dimethyl Ammonium Chloride (DDAC) is a quaternary ammonium-based antimicrobial used as a bacteriostat, disinfectant, or micro biocide. It is ideal for recirculation water systems where control of undesirable microbes without excessive foam is essential.

DDAC has been found to be effective in a variety of fields, including injection water treatment in oilfields and industrial circulating cooling systems, fungi, and bacteria disinfection, wood preservative agents, and textile moth-proofing agents. Additionally, it can also be used with chlorine dioxide when treating hard surfaces to eliminate bacteria.

Package and Storage:

Diotyl Dimethyl Ammonium Chloride (DDAC, D0821) should be stored in original containers in a dry and well-ventilated area away from extreme temperatures. It is recommended to keep the product sealed and out of direct sunlight as high temperatures can degrade its efficacy. When handling DDAC, protective clothing such as gloves, face shields, respirators, boots, and chemical-resistant aprons are recommended.200L plastic drum, IBC(1000L), customers’ requirement—storage for one year in a shady room and dry place.


dioctyl dimethyl ammonium chloride

dimethyldioctylammonium chloride

n,n-dimethyl-n,n-dioctylammonium chloride

dioctyl dimethyl ammonium chloride–dodac

Bardac LF /Bardac LF-80

bisoctyl dimethyl ammonium chloride
1-octanaminium, n,n-dimethyl-n-octyl-, chloride

FAQs About D0821 for Water Treatment Chemicals:

What is Diotyl Dimethyl Ammonium Chloride (D0821)?
Diotyl Dimethyl Ammonium Chloride (D0821) is a cationic surfactant used in water treatment chemicals. It is a clear, colorless pale yellow liquid that functions as a disinfectant, algaecide, and flocculating agent. It can control bacteria, algae, fungi, slime-producing organisms, and suspended solids in water.

What are the uses of Diotyl Dimethyl Ammonium Chloride (D0821)?
Diotyl Dimethyl Ammonium Chloride (D0821) can be used in many applications, including wastewater disinfection, industrial wastewater treatment, drinking water disinfection, swimming pool disinfection, cooling tower cleaning and maintenance, oilfield chemicals formulation and production processes. In addition to its use as a biocide agent against microorganisms, it also helps solidify suspended particles in the water and aids in removing them from the system.

Are there any safety concerns associated with using Diotyl Dimethyl Ammonium Chloride (D0821)?

While generally safe to use when applied as directed and following proper safety protocols while handling this product, overexposure or misuse may cause health risks such as skin irritation or eye damage. Always wear protective gear such as gloves when handling this product and avoid contact with eyes and skin. If contact occurs by accident, seek medical attention immediately. This product should not be ingested under any circumstances. It should always be stored away from food or beverages to avoid contaminating food products or drinks with this chemical compound.

Is Diotyl Dimethyl Ammonium Chloride (D0821) eco-friendly?
Yes! When utilized responsibly at recommended concentrations, it poses a minimal environmental risk due to its rapid degradation rate once released into aquatic systems. However, misuse can result in an accumulation of toxic materials that could pose a threat to sensitive marine species such as fish or other aquatic life, so proper dilution guidelines must be followed when using this product for water treatment.

How do I apply Diotyl Dimethyl Ammonium Chloride (D0821) for water treatment?
The amount of Diatomaceous Earth required depends on the number of contaminants present in the water being treated but typically ranges from 0.02 – 0.1% concentration levels depending on what type of contaminants are present in the body of water being treated. To ensure effective results, it’s essential to follow all instructions on the label or consult a professional before using if unsure about concentrations needed for application purposes.

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