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尿素
Urea
CAS号: 57-13-6
分子式: CH4N2O
分子量: 60.06
别名: 脲,碳酰二胺
分子结构式:
  货号   品名   产品规格   包装   单价(RMB) 可用库存 备注 数量
154511 尿素 尿素氮溶液标准物质, 尿素氮:1000.4 mg/L 20ml 174.00 >10 15021
154510 尿素 99.999% metals basis 100g 395.00 >10 15021
154509 尿素 99.999% metals basis 25g 116.00 >10 15021
134733 尿素 for molecular biology, ≥99% 100g 203.00 >10 15021
104462 尿素 Ph. Eur., BP, USP, 99.0-100.5% 250g 56.00 >10 15021
104461 尿素 for molecular biology, ≥99% 500g 286.00 >10 15021
104460 尿素 药用 500g 65.00 >10 15021
104459 尿素 for electrophoresis 500g 702.00 >10 15021
104458 尿素 99.99% metals basis 25g 96.00 >10 15021
104457 尿素 99.99% metals basis 100g 302.00 >10 15021
104456 尿素 ACS, ≥99.5% (T) 500g 75.00 >10 15021
104455 尿素 AR 500g 29.00 >10 15021
104454 尿素 CP 500g 19.00 >10 15021
性状
质量标准
用途
危险性质
贮存

白色四方棱形状结晶或粉末。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、10ml95%乙醇、1ml95%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7.23。有刺激性。
熔点  132-135 °C(lit.)
密度  1.335 g/mL at 25 °C(lit.)
折射率  n20/D 1.40
溶解度  H2O: 8 M at 20 °C

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% 
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
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

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。分析中用以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。

WGK Germany  1
RTECS号 YR6250000
危险品标志  Xn
危险类别码  36/37/38-40
安全说明  26-36

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