酒精分类标准及用途

酒精分类、标准及用途Ethanol classification, standard and 酒精广泛应用于食品、 化学、医药、染料等行业， 酒精又是十分重要的清洁能源。通常，酒精按含杂质多少分为：无水酒精、食用酒精、工业酒精。Ethanol widely applies to many industries such as food, chemistry, medicine, dye and etc. In general, ethanol is divided to anhydrous ethanol, edible ethanol and industrial ethanol according to its impurity content.一、无水酒精Anhydrous ethanol无水酒精产品质量执行中华人民共和国国家标准GB/T678-2002《化学试剂－无水乙醇标准》。The product quantity of anhydrous ethanol execute the state criteria of the People's Republic of China GB/T678-2002 < Chemical Reagent- anhydrous ethanol standard>名称 Name优级纯Guarantee reagent分析纯Analytically pure化学纯Chemical pure乙醇的质量分数Mass fraction of ethanol （CH3CH2OH）/%≥99.8≥99.7≥99.5密度Density （ 20℃） /(g/mL)0.789~0.7910.789~0.7910.789~0.791与水混合试验Test mix with water 合格Qualified合格Qualified合格Qualified蒸发残渣的质量分数Mass fraction of evaporation residue /%≤0.0005≤0.001≤0.001酸度 ( 以 H+计)Acidity (by H+)/(mmol/100g)≤0.02≤0.04≤0.1碱度 ( 以 OH- 计) Alkalinity (by OH-)/(mmol/100g)≤0.005≤0.01≤0.03水分的质量分数Mass fraction of water/%≤0.2≤0.3≤0.5甲醇（ CH3OH）的质量分数Mass fraction of methanol（CH3OH）/%≤0.02≤0.05≤0.2异丙醇 [ （ CH3）2CHOH]的质量分数Mass fraction of isopropanol[（CH3）2CHOH]/%≤0.003≤0.01≤0.05羰基化合物（以CO计）的质量分数Mass fraction of carbonyl compound (by CO)/%≤0.003≤0.003≤0.005易炭化物质Readily carbonizable substance合格Qualified合格Qualified合格Qualified铁（ Fe）的质量分数≤0.00001——Mass fraction of ferrum (Fe)/%锌（ Ze）的质量分数Mass fraction of zinc/%≤0.00001——还原高锰酸钾物质 （以 O计）的质量分数 /%Mass fraction of reducing potassium permanganate substance (by O) /%≤0.00025≤0.00025≤0.0006用途：化学试剂、化学原料、防腐剂、消毒、燃料、有机...