Behenyl Dimethylamine (DMA22) CAS 21542-96-1

Introduction to DMA22

Behenyl Dimethylamine is a tertiary amine built on a C22 linear alkyl chain with two methyl substituents on the nitrogen atom. The extra-long hydrophobic carbon chain delivers strong lubricating and film-forming properties. It appears as a white to pale yellow waxy solid or flakes at room temperature, with a mild characteristic amine odor. It is insoluble in water and readily soluble in ethanol, isopropanol and hot oils.

Industrial production uses controlled fractional distillation to achieve consistent purity and amine value. The material softens at elevated temperatures and absorbs atmospheric moisture and carbon dioxide over extended open storage, leading to caking and reduced active content.

DMA22 Chemical & Physical Properties

Applications of DMA22

Hair conditioners and deep conditioning masks: Protonates under acidic conditions or reacts with alkylating agents to form quaternary ammonium salts such as behentrimonium chloride. The long carbon chain deposits a hydrophobic protective film on hair surfaces, reducing combing friction, smoothing cuticles and eliminating static flyaway.

Quaternary ammonium salt synthesis: Reacts with methyl chloride or benzyl chloride to produce high-value cationic surfactants. High raw material purity supports high conversion rates and minimizes pungent odors from residual free amines.

Textile and industrial antistatic agents: Blended into synthetic fiber spin finishes or plastic masterbatches. The polar amine group anchors to material surfaces while the long carbon chain provides lubrication, dissipating static charges generated by friction.

Storage & Safety Precautions for DMA22

• Store on pallets in a cool, dry warehouse away from direct sunlight. High ambient temperatures soften the waxy material and cause block sticking, complicating weighing and handling operations.
• Reseal the inner PE liner tightly immediately after opening. Prolonged exposure to humid air causes moisture and carbon dioxide absorption, leading to surface caking and reduced active amine value.
• Handle molten material with heat-resistant gloves, safety goggles and dust masks. Molten liquid causes irritation and may result in skin and eye burns upon direct contact.

DMA22 FAQ

Q: How does Behenyl Dimethylamine (DMA22) improve hair conditioner performance?

A: It forms cationic species in acidic formulations, depositing a smoothing film on hair to cut friction, tame static and deliver soft feel without heavy buildup.

Q: Why is DMA22 preferred for behentrimonium chloride synthesis?

A: High-purity feedstock enables complete quaternization, with low free amine residue and minimal off-odor in final surfactant products.

Q: What storage conditions are required for Behenyl Dimethylamine (DMA22)?

A: Store in a cool dry place away from sunlight. Reseal inner liners tightly after use to prevent caking and preserve amine value.