性状  无色透明液, 有水果香，易挥发, 对空气敏感, 能吸水分，水分能使其缓慢分解而呈酸性反应。能与氯仿、醇、丙酮和醚混溶，溶于水（10%ml/ml)。能溶解某些金属盐类（如氯化锂、氯化钴、氯化锌、氯化铁等。易燃。蒸气能与空气形成爆炸性混合物。半数致死量（大鼠，经口）11.3ml/kg。有刺激性。
密度：0.902
熔点：-83℃
沸点：77℃
折光率n20/D ：1.3719
闪点：-3 °C
   
备注:  以上描述，仅作参考，并不表示您收到的产品，与此项描述完全相符，产品的出厂标准，请参见质量标准。
质量标准  
   GB/T 12589-90
项目Item                                  分析纯      化学纯
                                           (AR)        (CP)
含量(C4H8O2)Assay,%                        99.0        97.0
密度(20℃)Density,g/mL                 0.899-0.901  0.897-0.901
色度Color，黑曾单位                      ≤ 10          20
蒸发残渣Evaporation residue,%            ≤ 0.0005     0.001
水份(H2O)Water,%                         ≤ 0.1         0.4
酸度(以H+计)Acidity,mmol/100g            ≤ 0.08       0.08
甲醇(以CH3OH计)Methanol,%                ≤ 0.1         0.2
乙醇(CH3CH2OH)Ethanol,%                  ≤ 0.2         0.5
乙酸甲酯(CH3COOCH3)Methyl formate,%      ≤ 0.1         0.3
易炭化物质Readily carbonizable substances   合格        合格
品级Grade                                 优级纯                                            (GR)
外观Appearance                           无色液体
红外光谱鉴别Infrared spectrometry        符合
纯度Purity                               ≥99.5% (GC)
水分Water                                <0.05 %
蒸发残渣Residue after evaporation        <0.001 %
亚硫酸变暗物Subst. darkened by H2SO4     <10 APHA
甲醇Methanol                             <0.1 %
乙醇Ethanol                              <0.1
乙酸甲酯Methyl acetate                   <0.1 %
ACS级
项目名称　                                       ACS Grade
含量Assay(CH3COOCH2CH3)                        ≥99.5%
色度Color(APHA)                                  10
灼烧残渣Residue after ignition                 ≤0.003%
水分（H2O）Water                               ≤0.2%
可滴定酸Titrable acid                          ≤0.0009meq/g
硫酸变黑物substances darkened by sulfuric acid   Passes test
品级Grade                                   色谱纯 
                                          (for HPLC, ≥99.8%)
外观Appearance                              无色液体
红外光谱鉴别Infrared spectrometry           符合
纯度Purity                                  ≥99.8% (GC) 
水分water                                   <0.050% (by Karl Fischer)
蒸发残渣Residue on Evaporation              <0.0003%
λ H2O reference
UV absorption
  λ: 254 nm A:                              ≤1.00
  λ: 263 nm A:                              ≤0.05
  λ: 275 nm A:                              ≤0.01
  λ: 400 nm A:                              ≤0.05 
项目                                      光谱纯   
                                     (for spectroscopy)
外观Appearance                           无色液体
色度Color scale                          <10 APHA
纯度Purity                               ≥99.0% (GC)
水分Water                                <0.05 %
紫外吸收值UV：
  255 nm A:                               <1
  275 nm A:                               <0.05
  300 nm A:                               <0.03
  325 nm A:                               <0.01
蒸发残渣Residue on Evaporation            <0.0003 %
品级Grade                               蛋白测序级 
                                (for protein sequence analysis)
外观Appearance                          无色液体
红外光谱鉴别Infrared spectrometry       Conforms
纯度Purity                              ≥99.5% (GC) 
水分water                               ≤0.1% 
测序分析实验sequence analysis test      Pass

项目                                      农残级   
                                     (for spectroscopy)
外观Appearance                           无色液体
色度Color scale                          <10 APHA
纯度Purity                               ≥99.5% (GC)
水分Water                                <0.03 %
蒸发残渣Residue on Evaporation           <0.0001 %
halogenated residue (GC/ECD)             <10 ng/L (as heptachlor epoxide)
品级Grade                               LC-MS级 
                              (for LC-MS, ≥99.9% (GC))
含量assay                               ≥99.9% (GC)
游离碱free alkali (as NH3)              ≤0.0005%
非挥发物non-volatile matter             ≤0.0005%
水分water                               ≤0.03%  (Karl Fischer)
透光度transmittance
  260 nm,                               ≤50%
  300 nm,                               ≤98%
Ca:                                     ≤0.1 ppm
K:                                      ≤0.1 ppm
Mg:                                     ≤0.1 ppm
Na:                                     ≤0.1 ppm
Test for suitability for LC-MS          passes
品级Grade                               生物工程级
                                    (biotech. grade, ≥99.9%)
外观Appearance                          Colorless Liquid
红外光谱鉴别Infrared spectrometry       Conforms
纯度Purity                              ≥99.9% (GC)
可滴定酸Titratable acid                 ≤0.0009 meq
水分Water                               ≤0.01 % (by Karl Fischer)
蒸发残渣Residue on Evaporation          ≤0.0003 %
λ H2O reference
UV absorption
  λ: 254 nm A:                          ≤1.00
  λ: 263 nm A:                          ≤0.05
  λ: 275 nm A:                          ≤0.01
  λ: 400 nm A:                          ≤0.01
贮存  
用途  萃取剂，从水溶液中提取许多化合物（磷、钨、砷、钴）,有机分析中用作结晶时的溶剂，分离糖类时作为校正温度计的标准物质，检定铋、金、铁、汞、氧化剂和铂，测定铋、硼、金、铁、钼、铂、钾和铊。生化研究，蛋白质顺序分析。环保、农药残留量分析。有机合成。香料制造。
联合国编号  1173
Risk：  R11- R36- R66- R67-
Safety :  S16- S26- S33-
Hazard :  F - Xi -