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|Section2= |Section6= |Section7= }} Benzalkonium chloride, also known as BZK, BKC, BAC, alkyldimethylbenzylammonium chloride and ADBAC, is a class of cationic surfactants. They are organic salts, called quaternary ammonium compounds. It has three main categories of use: as a biocide, a cationic surfactant, and phase transfer agent.〔Maximilian Lackner, Josef Peter Guggenbichler "Antimicrobial Surfaces" Ullmann's Encylopedia of Industrial Chemistry, Wiley-VCH, Weinheim, 2013. 〕 ADBACs are a mixture of alkylbenzyldimethylammonium chlorides, where the alkyl group has various even-numbered alkyl chain lengths. ==Solubility and physical properties== Depending on purity, benzalkonium chloride ranges from colourless to a pale yellow (impure). Benzalkonium chloride is readily soluble in ethanol and acetone. Although dissolution in water is slow, aqueous solutions are easier to handle and are preferred. Aqueous solutions should be neutral to slightly alkaline,. Solutions foam when shaken. Concentrated solutions have a bitter taste and a faint almond-like odour. Standard concentrates are manufactured as 50% and 80% w/w solutions, and sold under trade names such as BC50, BC80, BAC50, BAC80, etc. The 50% solution is purely aqueous, while more concentrated solutions require incorporation of rheology modifiers (alcohols, polyethylene glycols, etc.) to prevent increases in viscosity or gel formation under low temperature conditions. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「benzalkonium chloride」の詳細全文を読む スポンサード リンク
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