Product Overview
C12-16-Alkyldimethylamine (CAS 68439-70-3) is a mid-chain tertiary amine composed of C12, C14, and C16 alkyl dimethylamines, supplied as a clear, pale yellow to amber liquid with a mild amine odor . It functions as a versatile chemical intermediate and functional surfactant, with its performance profile governed by the alkyl chain distribution-typically C12 dominant, with meaningful C14 content and a minor C16 fraction.
This grade is characterized by a high tertiary amine content (≥98%) and a tightly controlled amine value, ensuring predictable reactivity in downstream derivatization . The C16 fraction contributes enhanced lipophilicity (LogP up to approximately 6.0) relative to shorter-chain analogs, which translates to stronger adsorption on hydrophobic surfaces and more persistent film formation in corrosion inhibition and emulsification applications . The product is insoluble in water but miscible with organic solvents, and it exhibits good thermal stability with low volatility.
As a principal raw material for quaternary ammonium compounds, amine oxides, and betaine surfactants, this C12-16 alkyldimethylamine is positioned at the front end of surfactant manufacturing. Its chain-length distribution directly influences the critical micelle concentration, surface tension reduction, and foam characteristics of the resulting derivatives, making precursor selection a critical formulation decision.
Applications
Surfactant Intermediate (Primary Application)
The dominant use of this product is as a chemical intermediate for the manufacture of cationic quaternary ammonium compounds, amphoteric betaines, and amine oxides . These derivatives serve as fabric softeners, foam boosters, viscosity modifiers, and conditioning agents in home care and personal care formulations . The controlled C12-16 chain distribution allows formulators to tune the hydrophile-lipophile balance of the final surfactant for specific end-use performance.
Corrosion Inhibition
C12-16-Alkyldimethylamine and its derivatives are employed as corrosion inhibitors in industrial fluid systems, including oil recovery and water treatment . The longer C16 fraction enhances adsorption onto metal surfaces, forming a persistent hydrophobic barrier that reduces corrosive attack under demanding conditions . This makes the product suitable for formulating inhibitors where film durability is required.
Industrial Processing Aids
The product serves as a raw material for asphalt emulsifiers, rubber mold release agents, flotation agents in mineral processing, anti-caking agents for fertilizers, and fuel additives . In mineral processing, derivatives act as collector or flotation agent intermediates . These applications leverage the amine's surface-active properties and its ability to be readily converted into functional derivatives tailored to specific industrial processes.
Biocides and Water Treatment
Quaternized derivatives of C12-16-alkyldimethylamine are used for biocidal control and scale inhibition in cooling towers and water treatment systems . The lipophilic character imparted by the C16 component supports membrane interaction with microbial targets, while the C12 fraction contributes to solubility and handling characteristics during derivative synthesis.
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