A type of organic compoundcontaining the group -CO.O.CO-.Simpleacid anhydrides have the general formulaRCOOCOR,where R and Rare alkyl oraryl groups. They can be regarded asformed by removing a molecule of waterfrom two molecules of carboxylic acid. Forexa...[继续阅读]

    The sodium salts of organicacids used in the dyeing of silk and wool.They are so called because they are appliedfrom a bath acidified with dilute sulfuric orethanoic acid.用于丝和羊毛染色的有机酸的钠盐。之所以这样命名,是因为它们经稀释的硫酸或乙酸酸化处理过。...[继续阅读]

    See acyl halide.参阅acyl halide。...[继续阅读]

    Having a tendency to release a pro-ton or to accept an electron pair from a do-nor. In aqueous solutions the pH is a meas-ure of the acidity,i.e.an acidic solution isone in which the concentration of H3O+ ex-ceeds that in pure water at the same tem-peratu...[继续阅读]

    A hydrogen atom in amolecule that enters into a dissociation e-quilibrium when the molecule is dissolvedin a solvent. For example,in ethanoic acid(CH3COOH)the acidic hydrogen is the oneon the carboxyl group,-COOH:CH3COOH+H2O⇌ CH3COO+H3O+.当分子溶解于溶剂中时,...[继续阅读]

    See dissociation constant.参阅dissociation constant。...[继续阅读]

    A measure of the free acidpresent in fats,oils,resins,plasticizers,andsolvents,defined as the number of milli-grams of potassium hydroxide required toneutralize the free acids in one gram of thesubstance.对存在于脂肪、油类、树脂、塑化剂和溶剂中游离酸的测量值。定义为中和...[继续阅读]

    A colorless crystallineheterocyclic compound with three fused rings. Derivatives of acridine are used asdyes and biological stains.(C12H9N) 一种无色的晶状杂环化合物,具有三个稠环。吖啶的衍生物被作为染料和生物学染色剂使用。Acridine吖啶...[继续阅读]

    A synthetic fiberthat consists of a copolymer of l-cya-noethene (acrylonitrile;vinyl cyanide)andethenyl ethanoate (vinyl acetate). Seeacrylic resin.(商标) 由1-腈基乙烯(丙烯腈,乙烯基氰化物)和乙烯基乙酸盐(乙酸乙烯酯)共聚得到的人造纤维。参阅acrylic resin。...[继续阅读]

    See propenal.参阅propenal。...[继续阅读]