碳酰二胺

性状描述: 白色四方棱柱状结晶或粉末。有氨的气味 和咸味。加热温度高于其熔点时则分解成缩二脲、氨和三聚氰酸。1g溶于1ml水、10ml 95％乙醇、1ml 95％沸乙醇、20ml无水乙 醇、6ml甲醇和2ml甘油。溶于浓盐酸，几乎不溶于乙醚和氯仿。 10％水溶液的pH为7.2。 水溶液相对密度(W/W，d184) 10％ 1.027、20％ 1.054、50％ 1.145。相对密度 (d184)1.32。熔点 132.7℃。有刺激性。

质量标准: GB/T 696-94
项目Item                                     分析纯　　　　　 化学纯
　　　　　　　　　　　　　　　　　　　　　     (AR)             (CP)
含量(H₂NCONH₂)Assay,%                       ≥ 99.0            99.0
澄清度试验Clarty                               合格            合格
水不溶物lnsoluble matter in water,%         ≤ 0.005           0.02
灼烧残渣(以硫酸盐计)Ignition residue,%      ≤ 0.01            0.02
氯化物(Cl)Chloride,%                        ≤ 0.0003          0.001
硫酸盐(SO₄)Sulfale,%                        ≤ 0.001           0.005
氨(NH₃)Ammonia,%                            ≤ 0.005           0.005
铁(Fe)Iron,%                                ≤ 0.0002          0.0005
重金属(以Pb计)Heavy metals,%                ≤ 0.0002          0.005
缩二脲(C₂H₅N₃O₂)Blured,%                    ≤ 0.2             0.4


品级Grade                               ACS级  
                                    (ACS, ≥99.5% (T))
外观Appearance                          White Powder
红外光谱Infrared spectrometry           Conforms to Structure
纯度Purity(GC)                          ≥99.5% (T)  
甲醛formaldehyde (HCHO)                 ≤0.005%  
缩二脲biuret                            ≤0.1%  
灼烧残渣Residue on ignition(as SO4)     ≤0.01%  
熔点Melting point                       132-135 °C
anion traces by ICP Atomic emission
氯chloride (Cl-):                       ≤5 ppm
硫酸根sulfate (SO42-):                  ≤10 ppm
cation traces by ICP Atomic emission
  Ca:                                   ≤10 ppm
  Cd:                                   ≤5 ppm
  Co:                                   ≤5 ppm
  Cr:                                   ≤5 ppm
  Cu:                                   ≤5 ppm
  Fe:                                   ≤5 ppm
  K:                                    ≤50 ppm
  Mg:                                   ≤5 ppm
  Mn:                                   ≤5 ppm
  Na:                                   ≤50 ppm
  Ni:                                   ≤5 ppm
  Pb:                                   ≤5 ppm
  Zn:                                   ≤5 ppm


99.99% metals basis:


外观Appearance                          无色至白色结晶
X-射线衍射分析X-Ray Diffraction         Conforms to standard
纯度Purity                              ≥99.99% Purity Based On Trace Metals Analysis Of ICP and AA Combined
ICP:                                     Confirms Na and S Components Confirmed
干燥损失Loss on ignition                
<0.5% (1 Hours, 1100 °C) >铁Iron (Fe)                             Pass
铵Ammonium (NH4)                        ≤0.005 %
Sulfite and Thiosulfite                 ≤0.1 %
金属杂质Trace Metal Analysis            ≤100.0 ppm by ICP and AA Combined
(Al、Ba、B、Ca、Cr、Fe)
金属杂质Trace Metal Analysis            ≤100.0 ppm by Atomic Absorption
(Li、K、Ru、Cs)



品级Grade                                     电泳级  
                                         (for electrophoresis)
铅lead by ICP-atomic emission                 ≤ 5 ppm  
铁iron by ICP-atomic emission                 ≤ 1 ppm
离子选择性电极测试specific ion electrode test ≤ 0.005% ammonia
电泳测试suitability test                      suitable for electrophoresis
紫外吸收uv absorbance                         ≤0.06 AT 260 NM (C= 5 M, H2O)
紫外吸收uv absorbance                         ≤0.06 AT 280 NM (C= 5 M, H2O)
纯度Purity                                    ≥98%


品级Grade                               细胞培养级  
                                       (for cell culture)
外观Appearance                          White Pellets
红外光谱Infrared spectrometry           Conforms to Structure
纯度Purity(                             ≥99.0%    
水溶解试验solubility in water           Colorless，Clear，100 mg/mL, H2O
水分Water (by Karl Fischer)             ≤3%
细胞培养测试Cell Culture Test           Pass



品级Grade                               分子生物学级，≥99%  
                               (for molecular biology, ≥99%, powder)
外观appearance                           white powder
水溶性solubility                         clear colorless solution at 1g plus 10ml of water
铅lead by ICP-atomic emission             ≤ 5 ppm  
铁iron by ICP-atomic emission             ≤ 1 ppm
铜copper by ICP-atomic emission           ≤ 1 ppm  
氯chloride content                        ≤ 5 ppm
氰酸cyanate content                       ≤ 10 ppm
DNA酶DNases,                              none detected
RND酶RNases,                              none detected  
蛋白酶proteases,                          none detected
核酸内切酶nickase,endonuclease detection  none detected
纯度Purity                                    ≥99%


品级Grade                               药典级  
                                (Ph. Eur., BP, USP, 99.0-100.5%)
含量assay                                99.0-100.5%  (calc. on dry substance)
碱反应物质alkalic reac. substances,      complies
残留溶剂residual solvents,               complies
重金属heavy metals (as Pb)               ≤0.001%  
不溶物insoluble in ethanol               ≤0.04%  
铵根ammonium (NH4)                       ≤0.05%  
缩二脲biuret(carbamylurea)               ≤0.1%  
灼烧残渣Residue on ignition(as SO4)      ≤0.1%  
干燥损失loss on drying, 105 °C, 1 h     ≤1.0%  
熔点Melting point                        132-135 °C
anion traces
氯chloride (Cl-):                        ≤10 ppm
硫酸根sulfate (SO42-):                   ≤50 ppm
铁Fe:                                    ≤0.5 ppm

储存条件: 密封保存。

用途: 分析中用以检验锑和锡。测定铅、钙、铜、镓、磷、碘化物和硝酸盐。测定血液尿素氮时，配标准溶液，测定血清胆红素。烃的分离。分解氮的氧化物及亚硝酸。制备培养基。福林法测定尿酸时的稳定剂，均相沉淀。