N,N-Dimethyldecylamine (DMA10) CAS 1120-24-7

Introduction to DMA10

N,N-Dimethyldecylamine is built on a ten-carbon linear alkyl chain bonded to a reactive dimethylamino headgroup. The C10 chain length strikes a balance between lipophilicity and water dispersibility, supporting effective microbial membrane penetration without causing heavy foaming in formulated products. It appears as a clear colorless to pale yellow liquid at room temperature, with a characteristic pungent fishy amine odor.

The compound is practically insoluble in water and miscible with ethanol, isopropanol and non-polar hydrocarbon solvents. Industrial production uses precision fractionation to achieve target purity and mild odor profiles. It readily undergoes quaternization with alkyl halides and oxidation with peroxide-based reagents.

DMA10 Chemical & Physical Properties

Applications of DMA10

Quaternary ammonium biocides: Reacts with benzyl chloride to produce decyl benzalkonium chloride (C10 BKC), a cationic biocide with targeted activity against gram-negative bacteria and algae. The low-foaming profile makes it suitable for clean-in-place systems and cooling tower water treatment.

Amine oxide and betaine surfactants: Oxidizes to form decyl dimethyl amine oxide, a hydrotrope and foam stabilizer for heavy-duty hard surface cleaners. It also serves as a precursor for decyl betaine, used in personal care formulations for mild skin feel.

Polyurethane catalysts: Acts as a specialized co-catalyst in polyurethane foam production, balancing blowing and gelling reactions to promote uniform cell structure and consistent foam quality.

Oilfield chemicals: Serves as a precursor for filming amine corrosion inhibitors in downhole operations. The C10 chain anchors to steel pipe surfaces, forming a protective barrier against acidic brines and hydrogen sulfide exposure.

Storage & Safety Precautions for DMA10

• Store in cool, dry conditions with nitrogen blanketing on bulk tanks. Avoid exposure to atmospheric oxygen and carbon dioxide to preserve color and active amine value.
• Use only 316 stainless steel or PTFE-lined equipment for transfer and storage. Contact with copper or brass alloys catalyzes oxidation and forms dark colored complexes that degrade downstream product quality.
• Handle concentrated material as corrosive and a skin sensitizer. Wear chemical splash goggles, heavy-duty nitrile gloves and long sleeve protective clothing during bulk transfer operations.

DMA10 FAQ

Q: How does N,N-Dimethyldecylamine (DMA10) improve biocide performance?

A: It reacts into decyl benzalkonium chloride. The C10 chain enables rapid bacterial cell penetration, delivering strong algae activity with minimal foam for clean-in-place systems.

Q: Why is N,N-Dimethyldecylamine (DMA10) preferred for amine oxide synthesis?

A: It oxidizes cleanly to decyl dimethyl amine oxide with balanced surface activity. High-purity feedstock preserves water-white color in final surfactant products.

Q: What causes N,N-Dimethyldecylamine (DMA10) to turn dark during storage?

A: Exposure to air or trace copper catalyzes oxidation and forms dark complexes. Store in nitrogen-blanketed stainless steel equipment to avoid discoloration.