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...[繼續(xù)閱讀]

    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.用于絲和羊毛染色的有機酸的鈉鹽。之所以這樣命名,是因為它們經(jīng)稀釋的硫酸或乙酸酸化處理過。...[繼續(xù)閱讀]

    See acyl halide.參閱acyl halide。...[繼續(xù)閱讀]

    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...[繼續(xù)閱讀]

    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+.當(dāng)分子溶解于溶劑中時,...[繼續(xù)閱讀]

    See dissociation constant.參閱dissociation constant。...[繼續(xù)閱讀]

    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.對存在于脂肪、油類、樹脂、塑化劑和溶劑中游離酸的測量值。定義為中和...[繼續(xù)閱讀]

    A colorless crystallineheterocyclic compound with three fused rings. Derivatives of acridine are used asdyes and biological stains.(C12H9N) 一種無色的晶狀雜環(huán)化合物,具有三個稠環(huán)。吖啶的衍生物被作為染料和生物學(xué)染色劑使用。Acridine吖啶...[繼續(xù)閱讀]

    A synthetic fiberthat consists of a copolymer of l-cya-noethene (acrylonitrile;vinyl cyanide)andethenyl ethanoate (vinyl acetate). Seeacrylic resin.(商標(biāo)) 由1-腈基乙烯(丙烯腈,乙烯基氰化物)和乙烯基乙酸鹽(乙酸乙烯酯)共聚得到的人造纖維。參閱acrylic resin。...[繼續(xù)閱讀]

    See propenal.參閱propenal。...[繼續(xù)閱讀]