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Methyltrioctylammonium chloride (CAS No.: 5137-55-3) is a quaternary ammonium halide with the chemical formula C₂₅H₅₄ClN and a molecular weight of 404.16. It is a cationic surfactant and is widely used in chemical, metallurgical, and environmental protection fields.

Basic Properties

Chinese Name: Methyl trioctyl ammonium chloride

English Name: Methyl trioctyl ammonium chloride (also known as Aliquat 336, TOMAC, etc.)

Synonyms: Trioctylmethyl ammonium chloride, Methyl trioctylamine chloride, Tri-n-octylmethyl ammonium chloride, etc.

Appearance: Colorless to pale orange viscous liquid

Density: 0.884 g/mL (25°C)

Melting Point: -20°C

Boiling Point: 240°C

Flash Point: >230°F (approximately 110°C)

Water Solubility: Partially insoluble in water, readily soluble in organic solvents such as chloroform and hexane

Stability: Stable, but highly hygroscopic; requires storage in an inert gas atmosphere (such as nitrogen or argon) at 2–8°C in a sealed container.

Incompatible with: Incompatible with strong oxidizing agents.