quaternary ammonium salt

quaternary ammonium salt

[′kwät·ən‚er·ē ə¦mō·nē·əm ′sȯlt]
(organic chemistry)
A nitrogen compound in which a central nitrogen atom is joined to four organic radicals and one acid radical, for example, hexamethonium chloride; used as an emulsifying agent, corrosion inhibitor, and antiseptic.
References in periodicals archive ?
Summary: Melamine and sodium chloroacetate were used as raw materials to synthesize a kind of quaternary ammonium salt (QAS) as potential clay swelling inhibitor and water-based drilling fluid additive, and the reaction conditions were screened based on the linear expansion rate of bentonite.
Note that this peak disappears in QCS-PAA in chitosan derivatives caused by formation of quaternary ammonium salt at C-2 at high wave number.
US Patent 8,871,700 B2: Procter & Gamble has patented a liquid cleaning and disinfecting composition that is comprised of C12-14 linear alkyl dimethyl amine oxide; a Zn2+ salt selected from the group consisting of Zn carbonate, Zn sulphate, Zn citrate and mixtures thereof; an anionic surfactant selected from the group consisting of alkyl sulfate, alkyl ethoxy sulfate and mixtures thereof; an organic solvent selected from the group consisting of ethanol, benzyl alcohol, and mixtures thereof; and at least one biocide selected from the group consisting of a halogenated benzyl alcohol derivative, a halogenated hydroxy-diphenylether, a quaternary ammonium salt, an alkylbenzethonium chloride, a peroxide bleach system, and mixtures thereof.
More specifically, negatively surface charged fibers, including viscose and cotton, have been shown to bind up to 40% of the positively charged quaternary ammonium salt therefore limiting disinfection performance and wasting valuable amounts of the wipe active.
Smectite-based organoclays are modified with a quaternary ammonium salt which facilitates compatibility with a variety of organic solvent systems.
The herbicide solution for Enlist is based on the innovative choline salt of 2,4-D, a quaternary ammonium salt which is different from 2,4-D amine or ester formulations.
The use of choline chloride, as shown in Figure 5, is interesting because this quaternary ammonium salt forms a liquid with complexing agent in a same phase, making eutectic ILs.
Polysiloxane-Based, Hybrid Antifouling/Fouling-Release Coatings Containing Tethered Quaternary Ammonium Salt Groups--Partha Majumdar, et al.
A trimethoxysilane-functional quaternary ammonium salt (QAS) was used to modify the polysiloxane matrix.
The pigment dispersing resin being a copolymer of polymerizable unsaturated monomer containing at least one kind of ionic functional group selected from the group consisting of tertiary amino group, quaternary ammonium salt and sulfonic acid group; nonionic polymerizable unsaturated monomer having polyoxyethylene chain; ultraviolet-absorbing polymerizable unsaturated monomer and/or ultraviolet-stabilizing polymerizable unsaturated monomer; and other ethylenically unsaturated monomer, the copolymer being a copolymerization product of 0.

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