Diallyldimethylammonium chloride
[CAS# 7398-69-8]

Identification

• Classification: Catalysts and additives
• Name: Diallyldimethylammonium chloride
• Synonyms: N,N-Dimethyl-N-2-propenyl-2-propen-1-aminium chloride; Diallyl dimethyl ammonium chloride
• Molecular Formula: C₈H₁₆ClN
• Molecular Weight: 161.67
• CAS Registry Number: 7398-69-8
• EC Number: 230-993-8
• SMILES: C[N+](C)(CC=C)CC=C.[Cl-]

Safety Data

• Hazard Symbols: GHS09 Danger
• Risk Statements: H412
• Safety Statements: P273-P501

Hazard Classification

Hazard	Class	Category Code	Hazard Statement
Chronic hazardous to the aquatic environment	Aquatic Chronic	3	H412
Acute hazardous to the aquatic environment	Aquatic Acute	1	H400
Chronic hazardous to the aquatic environment	Aquatic Chronic	1	H410

Discovery and Applications

Diallyldimethylammonium chloride (DADMAC) is a quaternary ammonium compound widely recognized for its versatile applications in various fields, particularly in polymer chemistry, water treatment, and personal care products. The discovery of DADMAC dates back to the mid-20th century when researchers began exploring the synthesis of ammonium salts and their potential applications in industrial processes. Its unique chemical structure, characterized by two allyl groups and a dimethylammonium moiety, imparts distinct properties that make it valuable in different formulations.

The synthesis of DADMAC involves the reaction of diallylamine with dimethyl sulfate or methyl chloride in the presence of a base, resulting in the formation of this quaternary ammonium compound. The resulting product exhibits a high level of reactivity, particularly in polymerization reactions, where it can act as a cationic monomer. This reactivity has led to the development of various polymers and copolymers that incorporate DADMAC into their structures, enhancing their performance and functionality.

One of the primary applications of DADMAC is in the production of cationic polymers used in water treatment processes. The compound acts as a flocculant and coagulant, helping to remove suspended solids and impurities from water. By facilitating the aggregation of particles, DADMAC improves the efficiency of sedimentation processes, making it an essential ingredient in wastewater treatment facilities and drinking water purification systems. The effectiveness of DADMAC in water treatment has made it a popular choice for municipalities and industries seeking to meet stringent environmental regulations.

In addition to water treatment, DADMAC is widely used in the formulation of personal care products, such as shampoos, conditioners, and skin care items. Its cationic nature provides conditioning properties, allowing for improved moisture retention and enhanced texture in hair and skin products. DADMAC also exhibits antimicrobial properties, which can help to inhibit the growth of bacteria and fungi in cosmetic formulations. As a result, it is often included in formulations aimed at improving product stability and shelf life.

DADMAC's application extends to the paper and textile industries as well. In papermaking, the compound is utilized as a retention aid and a fixative for dyes and pigments, enhancing the quality and durability of paper products. In textiles, DADMAC is employed as a softener and antistatic agent, contributing to the overall feel and performance of fabrics.

Furthermore, DADMAC has gained attention in the field of drug delivery and biomedical applications. Its ability to form complexes with various biomolecules allows for potential use in targeted drug delivery systems and gene therapy. Researchers are exploring the use of DADMAC-based nanoparticles for encapsulating and transporting therapeutic agents, thereby enhancing the efficacy and bioavailability of drugs.

In summary, diallyldimethylammonium chloride is a versatile quaternary ammonium compound with significant applications in water treatment, personal care products, papermaking, textiles, and biomedical fields. Its discovery and subsequent utilization are attributed to its unique chemical properties, which enable it to perform effectively in various formulations. Ongoing research continues to explore new applications and formulations that leverage the beneficial characteristics of DADMAC.

References

2024. Comparison of Homogeneous Anion-Exchange Membrane Based on Copolymer of N,N-Diallyl-N,N-dimethylammonium Chloride and Commercial Anion-Exchange Membranes in Electrodialysis Processing of Dilute Sodium Chloride Solutions. Membranes and Membrane Technologies, 6(4).
DOI: 10.1134/s2517751624600407

2024. Novel composite film based on cassava starch and poly (diallyldimethylammonium chloride) reinforced with nanocrystalline cellulose for bacteria and coronavirus inactivation. Polymer Bulletin, 81(14).
DOI: 10.1007/s00289-024-05373-z

2024. Plasma-Chemical Modification of Polyethylene Surface for Copolymerization with Diallyldimethylammonium Chloride. High Energy Chemistry, 58(4).
DOI: 10.1134/s0018143924700358