性状 无色透明斜方形结晶或白色颗粒，无气味，味酸，在干燥空气中或加热至40-50℃成无水物，在潮湿空气中微有潮解性，75℃时变软，100℃时熔融，易溶于水，能溶于醇
密度：1.54  
熔点: 135-152℃
闪点: 173.9℃
  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 9855-88
项目Item                                           优级纯     分析纯   化学纯
                                                    (GR)       (AR)     (CP)
含量(C₆H₈O₇·H₂O)Assay,%                          ≥ 99.8     99.5    99.0
澄清度试验Clarity                                     合格     合格    合格
水不溶物Insoluble matter in water,%                ≤ 0.002    0.005   0.01
灼烧残渣(以硫酸盐计)Ignition residue,%             ≤ 0.01     0.02    0.07
氯化物(Cl)Chloride,%                               ≤ 0.0005   0.0005  0.005
硫酸盐(SO₄)Sulfate,%                               ≤ 0.002    0.005   0.02
磷酸盐(PO₄)Phosphate,%                             ≤ 0.001    0.001   0.005
草酸盐(C₂O₄)Oxalate                                ≤ 0.05     0.05     --
钙(Ca)Calcium,%                                    ≤ 0.002    0.005   0.02
铁(Fe)Iron,%                                       ≤ 0.0003   0.0005  0.001
铜(Cu)Copper,%                                     ≤ 0.0005   0.0005   --
铅(Pb)Lead,%                                       ≤ 0.0005   0.0005  0.001
易碳化物质Readily earbonizable substances             合格      合格    --


项目                                                ACS级    
                                                    (ACS)
含量Assay (C6H8O7•H2O)                             99.0-102.0%
不溶物Insoluble Matter                             ≤ 0.005%
灼烧残渣Residue after Ignition                     ≤ 0.02%
氯Chloride (Cl)                                    ≤ 0.001%
草酸盐试验Oxalate (C2O4)                           To pass test (limit about 0.05%)
磷酸盐Phosphate (PO4)                              ≤0.001%
硫酸盐Sulfur Compounds (as SO4)                    ≤0.002%
铁Iron (Fe)                                        ≤3 ppm
铅Lead (Pb)                                        ≤2 ppm
易碳化物质Substances Carbonizable by Hot Sulfuric Acid (Tartrates, etc.)
                                                  To pass test


品级Grade                               药典级
                                      (Ph. Eur., BP, USP, E330)
含量assay                             99.5-100.5% (based on anhydrous substance)
红外光谱鉴别Infrared spectrometry     Conforms
residual solvents,                    complies
heavy metals (as Pb)                  ≤0.0005%
water                                 7.5-8.8%  (Karl Fischer)
ign. residue                          ≤0.05% (as SO4)
pKa                                  (1) 3.13, (2) 4.76, (3) 6.4
痕量阴离子anion traces by ICP Atomic emission and AAS
chloride (Cl-):                       ≤50 ppm
oxalate (as oxalic acid):             ≤100 ppm
sulfate (SO42-):                      ≤100 ppm
痕量阳离子cation traces by ICP Atomic emission
  Al:                                ≤0.2 ppm
  As:                                ≤1 ppm
  Ca:                                ≤200 ppm
  Cu:                                ≤10 ppm
  Fe:                                ≤10 ppm
  Hg:                                ≤1 ppm
  Pb:                                ≤1 ppm
  Zn:                                ≤10 ppm
suitability                         complies for appearance of solution
                                    complies for reaction against H2SO4


99.9998% (metals basis) ：


含量assay                         ≥99.5% (T)
纯度Purity                        ≥99.9998% (metals basis)
total impurities
total nitrogen (N)                ≤5 ppm  
  acetate                         ≤5000 ppb  
  formia te                       ≤5000 ppb  
  glycolate                       ≤5000 ppb  
pKa                               (1) 3.13, (2) 4.76, (3) 6.4
anion traces
  bromide (Br-):                  ≤2000 ppb
  chloride (Cl-):                 ≤10000 ppb
  fluoride (F-):                  ≥2000 ppb
  iodide (I-):                    ≤2000 ppb
  nitrate (NO3-):                 ≤10000 ppb
  nitrite (NO2-):                 ≤2000 ppb
  oxalate (C2O42-):               ≤5000 ppb
  phosphate (PO43-):              ≤2000 ppb
  sulfate (SO42-):                ≤10000 ppb
  tartrate (C4H4O62-):            ≤0.2%
cation traces
  Ag:                             ≤0.01 ppm
  Al:                             ≤0.05 ppm
  As:                             ≤0.01 ppm
  Au:                             ≤0.01 ppm
  Ba:                             ≤0.05 ppm
  Be:                             ≤0.01 ppm
  Bi:                             ≤0.01 ppm
  Ca:                             ≤0.1 ppm
  Cd:                             ≤0.01 ppm
  Ce:                             ≤0.01 ppm
  Co:                             ≤0.01 ppm
  Cr:                             ≤0.05 ppm
  Cs:                             ≤0.01 ppm
  Cu:                             ≤0.01 ppm
  Dy:                             ≤0.01 ppm
  Er:                             ≤0.01 ppm
  Eu:                             ≤0.01 ppm
  Fe:                             ≤0.1 ppm
  Ga:                             ≤0.01 ppm
  Gd:                             ≤0.01 ppm
  Ge:                             ≤0.01 ppm
  Hf:                             ≤0.01 ppm
  Hg:                             ≤0.005 ppm
  Ho:                             ≤0.01 ppm
  In:                             ≤0.01 ppm
  Ir:                             ≤0.01 ppm
  K:                             ≤0.1 ppm
  La:                             ≤0.01 ppm
  Li:                             ≤0.01 ppm
  Lu:                             ≤0.01 ppm
  Mg:                             ≤0.05 ppm
  Mn:                             ≤0.01 ppm
  Mo:                             ≤0.01 ppm
  Na:                             ≤2 ppm
  Nb:                             ≤0.01 ppm
  Nd:                             ≤0.01 ppm
  Ni:                             ≤0.01 ppm
  Os:                             ≤0.01 ppm
  Pb:                             ≤0.01 ppm
  Pd:                             ≤0.01 ppm
  Pr:                             ≤0.01 ppm
  Pt:                             ≤0.01 ppm
  Rb:                             ≤0.01 ppm
  Re:                             ≤0.01 ppm
  Rh:                             ≤0.01 ppm
  Ru:                             ≤0.01 ppm
  Sb:                             ≤0.01 ppm
  Sc:                             ≤0.05 ppm
  Se:                             ≤0.05 ppm
  Sm:                             ≤0.01 ppm
  Sn:                             ≤0.01 ppm
  Sr:                             ≤0.01 ppm
  Ta:                             ≤0.01 ppm
  Tb:                             ≤0.01 ppm
  Te:                             ≤0.01 ppm
  Th:                             ≤0.01 ppm
  Ti:                             ≤0.05 ppm
  Tl:                             ≤0.01 ppm
  Tm:                             ≤0.01 ppm
  U:                              ≤0.01 ppm
  V:                              ≤0.01 ppm
  W:                              ≤0.01 ppm
  Y:                              ≤0.01 ppm
  Yb:                             ≤0.01 ppm
  Zn:                             ≤0.01 ppm
  Zr:                             ≤0.01 ppm

贮存 密封保存。

用途 检定铋、亚硝酸盐、氧和水，测定铝、铜、汞、镍、氧和钍、用作多价螯合剂，除去微量金属，配制缓冲溶液，测定血钾。