HG/T3 3-987-76
项目Item                                                                        分析纯(AR)         化学纯(CP)
含量Assay,%                                                                  ≥ 99.5               99.0
熔点范围Melting range,℃                                               121.0-123.0      121.0-123.0
澄清度试验Clarity                                                           合格               合格
灼烧残渣(以硫酸盐计)Ignition residue,%                        ≤ 0.01               0.02
氯化合物(Cl)Chlorine compounds,%                               ≤ 0.01               0.03
硫化合物(以SO₄计)Sulfur compounds,%                        ≤ 0.003             0.005
铁（Fe)Iron,%                                                               ≤ 0.0005            0.001
重金属(以Pb计)Heavy metals,%                                    ≤ 0.001             0.001
还原高锰酸钾物质Potassium permanganate-reducing
substances                                                                    合格                 --
硫酸试验Substances darkened by sulfuric acid               合格                合格

GB/T 12597-90
项目Item                                                           基准试剂(PT)
含量(C₆H₅COOH)Assay，%                              ≥99.95-100.5% (alkalimetric)
纯度Purity(HPLC)                                              ≥99.7%
熔点范围Melting range,℃                                 121.5-123.5
澄清度试验Clarity合格
灼烧残渣（以硫酸盐计）Ignition residue,%      ≤ 0.01
氯化合物(Cl)Chlorine compounds,%                 ≤ 0.003
硫化合物(以SO₄计)Sulfur compounds              ≤ 0.003
铁（Fe)Iron,%                                                 ≤ 0.0004
重金属(以Pb计)Heavy metals,%                      ≤ 0.0005
还原高锰酸钾物质(以O计)Potassium
permanganate-redncing substances                    ≤ 0.008
易炭化物质Readily carboxizable substances        合格

ACS级
项目名称Item                                                          ACS Grade
含量Assay                                                               ≥99.5%
结晶点Freezing point                                              122-123℃
灼烧残渣Residue after ignition                                ≤0.005%
甲醇不溶物Insoluble in mechanol                           ≤0.005%
氯化合物(Cl)Chloride compounds(as Cl)                ≤0.005%
硫化物(以S计)Sulfide(S)                                        ≤0.002%
重金属(以Pb计)Heavy metals(as Pb)                     ≤5ppm
还原高锰酸盐Substances reducing permanganate     Passes test

≥99.5%, FCC, Kosher, FG:

外观Appearance                                     Colorless Powder
红外光谱鉴别Infrared spectrometry       Conforms to Structure
纯度Purity (Titration by NaOH)               99.5 - 100.5 %  
熔点Melting point                                   121.0 -125.0 °C
水分Water (by Karl Fischer)                   ≤0.70 %  
砷Arsenic (As)                                       ≤3 ppm
镉Cadmium (Cd)                                  ≤1 ppm
汞Mercury (Hg)                                    ≤1 ppm
铅Lead (Pb)                                         ≤10 ppm
杂项检测Miscellaneous Assay               Pass
                                                           Passes Test (Readily Oxidizable substances And Readily Carbonizable substances)
灼烧残渣Residue on ignition (Ash)        ≤0.05 %
醇溶解试验solubility in 95% Ethanol     Clear Colorless ,1gm/3ml 95% Ethanol
凝固点Solidification Point                      121.0 -123.0 °C

品级Grade                                                       药典级  
                                                              (Ph. Eur., BP, USP, FCC, E210)  
含量assay                                                  99.5-100.5% (alkalimetric)
可氧化物质oxidisable substances,              complies
残留溶剂residual solvents,                         complies
重金属heavy metals (as Pb)                     ≤0.0005%  
卤化物halogen compounds (as Cl)           ≤0.03%  
水分water (Karl Fischer)                           ≤0.7%  
灼烧残渣ign. residue(as SO4)                   ≤0.05%  
干燥损失loss on drying, 3 h (via H2SO4)  ≤0.5%
pH                                                           3-5 (20 °C, 0.1%)
熔点mp                                                  121-125 °C
  As:                                                       ≤3 ppm
  Cu:                                                      ≤10 ppm
  Hg:                                                      ≤1 ppm
  Pb:                                                      ≤2 ppm
  Zn:                                                       ≤20 ppm
溶液外观appearance of solution             complies
和硫酸反应物质for reaction against H2SO4  complies

  苯甲酸常以游离酸、酯或其衍生物的形式广泛存在于自然界。例如，在安息香胶内以游离酸和苄酯的形式存在，在一些植物的叶和茎皮中以游离的形式存在，在香精中以甲酯或苄酯的形式存在，在马尿中以其衍生物马尿酸的形式存在。蒸气易挥发。