货号 | 名称 | 规格 | 包装 | 单价(元) | 优惠(元) | 库存 | 数量 | 操作 |
---|---|---|---|---|---|---|---|---|
R254072 | 尿素 | CP | 500g | ¥ 18.00 | ¥ 18 | >10 | -+ | 加入购物车 |
R897882 | 尿素 | AR | 500g | ¥ 26.00 | ¥ 26 | >10 | -+ | 加入购物车 |
R491328 | 尿素 | GR | 500g | ¥ 30.00 | ¥ 30 | >10 | -+ | 加入购物车 |
R664624 | 尿素 | 药用 | 500g | ¥ 62.00 | ¥ 62 | >10 | -+ | 加入购物车 |
R397085 | 尿素 | 尿素氮溶液标准物质, 尿素氮:1000.4 mg/L | 20ml | ¥ 170.00 | ¥ 170 | >10 | -+ | 加入购物车 |
R395409 | 尿素 | ACS, ≥99.5% (T) | 500g | ¥ 72.00 | ¥ 72 | >10 | -+ | 加入购物车 |
R194418 | 尿素 | 99.99% metals basis | 25g | ¥ 90.00 | ¥ 90 | >10 | -+ | 加入购物车 |
R889001 | 尿素 | 99.99% metals basis | 100g | ¥ 290.00 | ¥ 290 | >10 | -+ | 加入购物车 |
R616567 | 尿素 | 99.999% metals basis | 25g | ¥ 108.00 | ¥ 108 | >10 | -+ | 加入购物车 |
R114002 | 尿素 | 99.999% metals basis | 100g | ¥ 388.00 | ¥ 388 | >10 | -+ | 加入购物车 |
R536448 | 尿素 | for molecular biology, ≥99% | 100g | ¥ 190.00 | ¥ 190 | >10 | -+ | 加入购物车 |
R277521 | 尿素 | for molecular biology, ≥99% | 500g | ¥ 350.00 | ¥ 350 | >10 | -+ | 加入购物车 |
R123785 | 尿素 | for electrophoresis | 500g | ¥ 685.00 | ¥ 685 | >10 | -+ | 加入购物车 |
R281445 | 尿素 | Ph. Eur., BP, USP, 99.0-100.5% | 250g | ¥ 55.00 | ¥ 55 | >10 | -+ | 加入购物车 |
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 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