乙酸銨 的化學(xué)性質(zhì),質(zhì)量標(biāo)準(zhǔn)及用途

無色或白色結(jié)晶，極易潮解，易溶于水和醇.熔點  110-112 °C (dec.)(lit.) ,密度  1.07 g/mL at 20 °C , 閃點  136 °C,儲存條件  2-8°C,溶解度  H2O: 1 M at 20 °C, clear, colorless,水溶解性  1480 g/L (20 ºC) 
 

AR ,CP,GR ,ACS,HPLC

項目Item                                       優(yōu)級純       分析純      化學(xué)純
                                                (GR)         (AR)        (CP)
含量(CH3COONH4)Assay,%                        ≥99.0         98.0        97.0
水溶液反應(yīng)Solution reaction                     合格         合格        合格
澄清度試驗Clarity                               合格         合格        合格
水不溶物Insoluble matter in water,%           ≤0.002        0.005       0.01
灼燒殘渣（以硫酸鹽計）Ignition residue,%      ≤0.005        0.005       0.01
水分(H2O)Water,%                              ≤2.0            --         --
氯化物(Cl)Chloride,%                          ≤0.0005       0.0005      0.001
硫酸鹽(SO4)Sulfate,%                          ≤0.001        0.002       0.005
硝酸鹽(NO3)Nitrate,%                          ≤0.001        0.001        --
磷酸鹽(PO4)Phosphate,%                        ≤0.0003       0.0005       --
鎂(Mg)Magnesium,%                             ≤0.0002       0.0004      0.001
鈣(Ca)Calcium,%                               ≤0.0005       0.001       0.002
鐵(Fe)Iron,%                                  ≤0.0002       0.0005      0.001
重金屬(以Pb計)Heavy metals,%                  ≤0.0002       0.0005      0.001
還原高錳酸鉀物質(zhì)Potassium 
permanganate-reducing substances              ≤0.005        0.01        0.01

項目名稱Item                                   ACS Grade
含量(CH3COONH4)Assay                           ≥97.0%
pH(5%溶液，25.0℃)pH                           6.7-7.3
水不溶物Insoluble matter                       ≤0.005%
蒸發(fā)殘渣Residue after evaporation              ≤0.01%
氯化物(Cl)Chloride(Cl)                         ≤5ppm
硝酸鹽(NO3)Nitrate                             ≤0.001%
硫酸鹽(SO4)Sulfate                             ≤0.001%
重金屬(以Pb計)Heavy metals(as Pb)              ≤5ppm
鐵(Fe)Iron(Fe)                                 ≤5ppm

品級Grade                                     色譜純   
                                            (grade for HPLC) 
含量assay                                      ≥99.0% (NT) 
pH                                             6.5-7.5 (20 °C, 10% in H2O)  
λ 10 % in H2O 
UV absorption
  λ: 250 nm                                    ≤ 0.05 
  λ: 260 nm                                    ≤ 0.04 
  λ: 270 nm                                    ≤ 0.03 
  λ: 280 nm                                    ≤0.02 
  λ: 500 nm                                    ≤0.02 
RP gradient test                               pass

品級Grade                                    分子生物學(xué)級, ~98%    
                                         (for molecular biology, ~98% ) 
外觀Appearance                                白色至類白色粉末
氯Chloride                                    ≤ 5 ppm 
鐵Iron (Fe)                                   ≤5 ppm 
重金屬Heavy Metals(As Lead)                   ≤5 ppm 
DNAse,                                        None Detected 
核酸外切酶Exonuclease Detection               None Detected 
RNAse Detection                               None Detected 
蛋白酶Protease by FITC-Casein                 None Detected 
純度Purity                                    ≥98.0% (滴定)

99.99% metals basis:

外觀Appearance                          White Moist Crystals
紅外光譜Infrared spectrometry           Conforms to Structure 
純度Purity                              ≥99.99% Based on Trace Metals Impurities
總痕量金屬雜質(zhì)total metallic impurities ≤100ppm by ICP Atomic emission
滴定純度Purity (Titration by NAOH)      ≥98.0 %
灼燒殘渣Residue on ignition (Ash)       0.01 %
不溶物Insoluble matter (C=10%; H2O)     ≤0.005 %
C=10%, H2O
氯Chloride (CL)                         ≤5 ppm
鐵Iron (Fe)                             ≤5 ppm
重金屬Heavy Metal (as Pb)               ≤5 ppm
硝酸根Nitrate (NO3)                     ≤0.001 %
pH (@ 25 °C, C=5%; H2O)              6.7- 7.3
硫酸根Sulfate                           ≤0.001 %

99.996% metals basis:

外觀Appearance                          White Crystals
紅外光譜Infrared spectrometry           Conforms to Structure
滴定純度Purity (Titration by NAOH)      ≥98.0 % 
純度Purity                              ≥99.996% Based on Trace Metals Impurities
總痕量金屬雜質(zhì)total metallic impurities ≤40ppm by ICP Atomic emission

品級Grade                               用于質(zhì)譜，LC-MS淋洗液添加劑   
                        (for mass spectroscopy ，eluent additive for LC-MS，≥99.0%) 
外觀Appearance                          White Crystals
紅外光譜Infrared spectrometry           Conforms to Structure
純度Purity                              ≥99.0% (calc. on dry substance, T) 
不溶物insoluble matter,                 passes filter test 
水分water                               ≤1% 
灼燒殘渣ign. residue                    ≤0.01% (as SO4) 
pH                                      6.2-7.5 (25 °C, 1 M in H2O) 
水溶性solubility H2O:                   soluble1 M at 20 °C, clear, colorless 
氯chloride (Cl-):                       ≤5 ppm 
硝酸根nitrate (NO3-):                   ≤10 ppm 
硫酸根sulfate (SO42-):                  ≤10 ppm 
cation traces Al:                       ≤1 ppm 
  As:                                   ≤0.1 ppm 
  Ba:                                   ≤1 ppm 
  Bi:                                   ≤1 ppm 
  Ca:                                   ≤5 ppm 
  Cd:                                   ≤1 ppm 
  Co:                                   ≤1 ppm 
  Cr:                                   ≤1 ppm 
  Cu:                                   ≤1 ppm 
  Fe:                                   ≤1 ppm 
  K:                                    ≤5 ppm 
  Li:                                   ≤1 ppm 
  Mg:                                   ≤1 ppm 
  Mn:                                   ≤1 ppm 
  Mo:                                   ≤1 ppm 
  Na:                                   ≤5 ppm 
  Ni:                                   ≤1 ppm 
  Pb:                                   ≤1 ppm 
  Sr:                                   ≤1 ppm 
  Zn:                                   ≤1 ppm 
λ                                 1 M in H2O 
UV absorption λ: 260 nm Amax:          ≤0.015 
  λ: 280 nm Amax:                      ≤0.010 
suitability in accordance for LC-MS

用途  用于肉類防腐、電鍍、水處理、制藥等 
用途  用作分析試劑、色層分析試劑和緩沖劑 
 

類別 有毒物品 
毒性分級 中毒 
急性毒性 腹腔-大鼠 LD50: 632 毫克/公斤; 靜脈-小鼠LD50: 386 毫克/公斤 
可燃性危險特性 可燃;燃燒產(chǎn)生有毒氮氧化物和氨煙霧 
儲運特性 庫房通風(fēng)低溫干燥 
滅火劑 干粉、泡沫、砂土、二氧化碳, 霧狀水