Shandong Huashang Chemical Co., Ltd. is a high-tech enterprise specializing in the research and development, manufacturing, and sales of fine chemicals. Headquartered in Jinan, Shandong, China, we are committed to delivering high-quality products to our global partners. Currently, over 90% of our products are exported to developed markets, including North America, Europe, Japan, South Korea, and the Middle East.
Product Description
Poly(diallyldimethylammonium chloride) (CAS: 26062-79-3), abbreviated as PDADMAC or PolyDADMAC, is a high-purity water-soluble cationic polyelectrolyte. It is typically supplied as a colorless to pale yellow viscous liquid, with a repeating unit of (C?H??ClN)? and a molecular weight ranging from 4×10? to 3×10? depending on the grade. Characterized by high positive charge density, good hydrolysis stability, and chlorine resistance, it is synthesized via radical polymerization of diallyldimethylammonium chloride (DADMAC) with organic peroxide as a catalyst. It is widely used in water treatment, papermaking, textiles, and biomedical fields due to its excellent flocculation, coagulation, and surface modification properties.
Uses
Water Treatment: A high-efficiency cationic flocculant/coagulant for drinking water purification, wastewater treatment, and sludge dewatering; neutralizes negatively charged colloidal substances, reduces sludge volume, and enhances solid-liquid separation efficiency.
Papermaking Industry: Used for pitch control, latex fixing, filler retention, and dewatering improvement in papermaking processes; also acts as an anionic garbage capture agent and AKD ripening accelerator to optimize production efficiency.
Textile & Cosmetics: Serves as an aldehyde-free fixing agent for textile dyeing and an antistatic, film-forming agent in cosmetics (Polyquaternium-6), improving fabric color fastness and cosmetic product stability.
Biomedical & Sensors: Coated on gold nanorods to enhance cellular uptake in biomedical systems; used in surface modification of indium tin oxide (ITO) substrates for chemical and biosensor fabrication; forms responsive carriers with mesoporous silica for drug delivery.
Molecular Formula & Structure
- Molecular Formula: (C?H??ClN)? (repeating unit)
- Molecular Weight: 126.22 g/mol (monomer); 4×10?–3×10? g/mol (polymer, depending on grade)
- IUPAC Name: Poly(2-propen-1-aminium, N,N-dimethyl-N-2-propenyl-, chloride)
- Synonyms: PDADMAC; PolyDADMAC; PDMDAAC; Polyquaternium-6; MFCD00192409; EC Number: 230-993-8; RTECS Number: BP6360000; UN Number: Not classified as dangerous goods; Customs Code: 3906909090.
- CAS Number: 26062-79-3
- SMILES Code: (Cl-).[N+](C)(C)(C=CC)C=CC
- Chemical Structure: A cationic polymer formed by radical polymerization of DADMAC monomers, with two main possible structures (pyrrolidine and piperidine), among which the pyrrolidine structure is more common. The polymer carries high positive charge density due to the quaternary ammonium groups in each repeating unit, enabling strong interaction with negatively charged substances.
Physical & Chemical Properties
- Appearance: Colorless to pale yellow transparent viscous liquid; no visible impurities; non-flammable.
- Density: 1.04–1.09 g/cm3 at 25°C; Viscosity: 60–50000 cps (25°C, depending on concentration/grade); Refractive Index: n??/d 1.375–1.417; Freezing Point: ~-2.8°C; Decomposition Temperature: 280–300°C; Flash Point: >100°C (not applicable for low-viscosity grades).
- Solubility: Freely soluble in water (insensitive to pH changes); insoluble in non-polar organic solvents; stable in a wide pH range and resistant to chlorine hydrolysis.
- Stability: Stable under normal temperature and pressure; incompatible with strong oxidants, iron, iron salts, and certain metals (steel, copper, aluminium); avoid prolonged exposure to high temperature and sunlight.
Synthesis & Storage
- Synthesis: Monomer DADMAC is first prepared by reacting dimethylamine with two equivalents of allyl chloride; PDADMAC is then synthesized via aqueous radical polymerization of DADMAC using organic peroxide as a catalyst, with nitrogen protection to ensure product purity. The crude product is purified to adjust viscosity and concentration for different application requirements.
- Storage: Store at 15–25°C in a cool, dry, dark, well-ventilated warehouse; keep sealed to prevent moisture and contamination. Packed in 25kg, 50kg, 200kg PE drums or 1000L IBC tanks. Avoid sunlight, high temperature (>30°C), and contact with strong oxidants; keep away from food and feed. Shelf life: 12–24 months (unopened, proper storage).
- Handling Precautions: Use in well-ventilated areas; wear nitrile gloves, safety goggles, and protective clothing to avoid skin and eye contact. It is non-toxic but irritating to skin, eyes, nose, and throat; in case of contact, rinse thoroughly with water. Dispose of waste in accordance with local regulations; dilute before disposal.
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