**English Name:** Poly(Dimethyl diallyl ammonium chloride); PolyPdadmac; PDMDAAC; PDADMAC

**CAS Registry Name:** 2-Propen-1-aminium,N,N-dimethyl-N-Propenyl-,chloride homopolymer

**CAS Number:** 26062-79-3

**Molecular Formula:** (C8H16NCl)n

**Performance Characteristics:**

Polydimethyl diallyl ammonium chloride is a strong cationic polyelectrolyte, appearing as a colorless to pale yellow viscous liquid. It is safe, non-toxic, readily soluble in water, non-flammable, has strong cohesive power, good hydrolytic stability, and does not form gels. Polydimethyl diallyl ammonium chloride is insensitive to pH changes and has chlorine resistance. Its freezing point is approximately -2.8℃, specific gravity is approximately 1.04 g/cm³, and decomposition temperature is 280-300℃.

This product, through charge neutralization and adsorption bridging, destabilizes and flocculates suspended particles and water-soluble substances containing negatively charged groups in water, demonstrating significant effects in decolorization, sterilization, and removal of organic matter.

Using this product as a flocculant offers advantages such as low dosage, large flocs, rapid settling, low residual turbidity, and minimal sludge production.

Polydimethyldiallyl ammonium chloride is a colorless to pale yellow viscous liquid, safe, non-toxic, and readily soluble in water. It exhibits good hydrolytic stability and chlorine resistance, making it suitable for use in various environments. It is widely used in water treatment, textiles, papermaking, and other fields as a highly efficient cationic flocculant and bactericide.

1. Water Treatment: Polydimethyldiallyl ammonium chloride is a strong cationic polyelectrolyte commonly used in tap water and wastewater treatment as a polymeric flocculant. It effectively removes suspended solids, bacteria, and algae from water, and is particularly suitable for treating high-turbidity raw water.

2. Textile Industry: In the textile industry, PDADMAC is used as a formaldehyde-free fixing agent, improving dye adhesion and color fastness, and reducing color difference during the dyeing process.

3. Papermaking Process: In the papermaking industry, polydimethyldiallyl ammonium chloride is used as an anionic debris trap and AKD curing accelerator, helping to improve paper quality and strength.

4. Oilfield Industry: In oilfield drilling, PDADMAC is used as a clay stabilizer and a cationic modifier for acid fracturing, improving drilling fluid performance and reducing the risk of wellbore collapse.

5. Other Applications: In addition, polydimethyldiallyl ammonium chloride can also be used as an antistatic agent, humectant, and emollient in shampoos and skin care products.