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Qu'est-ce (qui) est quaternary salt - définition

CLASS OF CATION CONTAINING NITROGEN WITH 4 SUBSTITUENTS

QUATS; Quaternary ammonium salt; Quaternary ammonium compound; Quats; Quaternary ammonium; Quaternary ammonium salts; Quaternary ammonium compounds; Quaternary amine; Tetraalkylammonium; Quaternary ammonium cations; Quat salt; Quaternary amines; Quaternary ammonium ion; Quaternary ammonium halide; Quat salts

Quaternary

THIRD AND CURRENT PERIOD OF THE CENOZOIC ERA

Quaternary age; Quaternary period; Quaternary Period; Quarternary; Quarterny period; The Quaternary Period; Quaternary (geology); Pleisto-Holocene; Quatenary; Quaternaries

·noun The number four.

II. Quaternary ·adj Consisting of four; by fours, or in sets of four.

III. Quaternary ·noun The Quaternary age, era, or formation. ·see the Chart of Geology.

IV. Quaternary ·adj Later than, or subsequent to, the Tertiary; Post-tertiary; as, the Quaternary age, or Age of man.

quaternary

THIRD AND CURRENT PERIOD OF THE CENOZOIC ERA

Quaternary age; Quaternary period; Quaternary Period; Quarternary; Quarterny period; The Quaternary Period; Quaternary (geology); Pleisto-Holocene; Quatenary; Quaternaries

a.

Four, fourfold, consisting of four.

quaternary

THIRD AND CURRENT PERIOD OF THE CENOZOIC ERA

Quaternary age; Quaternary period; Quaternary Period; Quarternary; Quarterny period; The Quaternary Period; Quaternary (geology); Pleisto-Holocene; Quatenary; Quaternaries

[kw?'t?:n(?)ri]

¦ adjective

1. fourth in order or rank.

2. (Quaternary) Geology relating to or denoting the most recent period in the Cenozoic era, following the Tertiary period (comprising the Pleistocene and Holocene epochs and beginning 1.64 million years ago).

3. Chemistry denoting an ammonium compound containing a cation of the form NR₄⁺, where R represents organic groups.

Origin

ME: from L. quaternarius, from quaterni 'four at once', from quater 'four times', from quattuor 'four'.

Wikipédia

Quaternary ammonium cation

In chemistry, quaternary ammonium cations, also known as quats, are positively-charged polyatomic ions of the structure [NR₄]⁺, where R is an alkyl group, an aryl group or organyl group. Unlike the ammonium ion (NH+4) and the primary, secondary, or tertiary ammonium cations, the quaternary ammonium cations are permanently charged, independent of the pH of their solution. Quaternary ammonium salts or quaternary ammonium compounds (called quaternary amines in oilfield parlance) are salts of quaternary ammonium cations. Polyquats are a variety of engineered polymer forms which provide multiple quat molecules within a larger molecule.

Quats are used in consumer applications including as antimicrobials (such as detergents and disinfectants), fabric softeners, and hair conditioners. As an antimicrobial, they are able to inactivate enveloped viruses (such as SARS-CoV-2). Quats tend to be gentler on surfaces than bleach-based disinfectants, and are generally fabric-safe.

https://en.wikipedia.org/wiki/Quaternary ammonium cation