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尿素 [57-13-6]
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英文名：Urea
- 别名：脲，碳酰二胺
- CAS号：57-13-6 分子式：CH4N2O 分子量：60.06
P41668-100g 尿素 [57-13-6] 99.99% metals basis 100g 300.00
P41661-25g 尿素 [57-13-6] 99.99% metals basis 25g 96.00
P41660-500g 尿素 [57-13-6] ACS, ≥99.5% (T) 500g 75.00
P41664-500g 尿素 [57-13-6] AR 500g 46.00 促销价:29.90
P41669-100g 尿素 [57-13-6] AR 100g 25.00 促销价:16.25
P41669-500g 尿素 [57-13-6] for electrophoresis 500g 698.00
P41667-500g 尿素 [57-13-6] for molecular biology, ≥99% 500g 283.00
P41666-100g 尿素 [57-13-6] for molecular biology, ≥99% 100g 200.00
P41665-250g 尿素 [57-13-6] Ph. Eur., BP, USP, 99.0-100.5% 250g 55.00
P41664-50mg 尿素 [57-13-6] 分析标准品,Purity≥98% 50mg 113.00 促销价:79.10
P41666-500g 尿素 [57-13-6] 药用 500g 65.00
P41661-25g 尿素 [57-13-6] 99.99% metals basis 25g 96.00
P41660-500g 尿素 [57-13-6] ACS, ≥99.5% (T) 500g 75.00
P41664-500g 尿素 [57-13-6] AR 500g 46.00 促销价:29.90
P41669-100g 尿素 [57-13-6] AR 100g 25.00 促销价:16.25
P41669-500g 尿素 [57-13-6] for electrophoresis 500g 698.00
P41667-500g 尿素 [57-13-6] for molecular biology, ≥99% 500g 283.00
P41666-100g 尿素 [57-13-6] for molecular biology, ≥99% 100g 200.00
P41665-250g 尿素 [57-13-6] Ph. Eur., BP, USP, 99.0-100.5% 250g 55.00
P41664-50mg 尿素 [57-13-6] 分析标准品,Purity≥98% 50mg 113.00 促销价:79.10
P41666-500g 尿素 [57-13-6] 药用 500g 65.00
| 订货编号 | 商品名称 | 规格 | 包装 | 单价 | 促销价 | 会员价 | 数量 |
| P41668-100g | 尿素 [57-13-6] | 99.99% metals basis | 100g | 300.00 | 300.00 | 登录可见 |
P41668-100g 尿素 [57-13-6] 99.99% metals basis 100g 300.00
|
| P41661-25g | 尿素 [57-13-6] | 99.99% metals basis | 25g | 96.00 | 96.00 | 登录可见 |
P41661-25g 尿素 [57-13-6] 99.99% metals basis 25g 96.00
|
| P41660-500g | 尿素 [57-13-6] | ACS, ≥99.5% (T) | 500g | 75.00 | 75.00 | 登录可见 |
P41660-500g 尿素 [57-13-6] ACS, ≥99.5% (T) 500g 75.00
|
| P41664-500g | 尿素 [57-13-6] | AR | 500g | 46.00 |
29.90
|
登录可见 |
P41664-500g 尿素 [57-13-6] AR 500g 46.00 促销价:29.90
|
| P41669-100g | 尿素 [57-13-6] | AR | 100g | 25.00 |
16.25
|
登录可见 |
P41669-100g 尿素 [57-13-6] AR 100g 25.00 促销价:16.25
|
| P41669-500g | 尿素 [57-13-6] | for electrophoresis | 500g | 698.00 | 698.00 | 登录可见 |
P41669-500g 尿素 [57-13-6] for electrophoresis 500g 698.00
|
| P41667-500g | 尿素 [57-13-6] | for molecular biology, ≥99% | 500g | 283.00 | 283.00 | 登录可见 |
P41667-500g 尿素 [57-13-6] for molecular biology, ≥99% 500g 283.00
|
| P41666-100g | 尿素 [57-13-6] | for molecular biology, ≥99% | 100g | 200.00 | 200.00 | 登录可见 |
P41666-100g 尿素 [57-13-6] for molecular biology, ≥99% 100g 200.00
|
| P41665-250g | 尿素 [57-13-6] | Ph. Eur., BP, USP, 99.0-100.5% | 250g | 55.00 | 55.00 | 登录可见 |
P41665-250g 尿素 [57-13-6] Ph. Eur., BP, USP, 99.0-100.5% 250g 55.00
|
| P41664-50mg | 尿素 [57-13-6] | 分析标准品,Purity≥98% | 50mg | 113.00 |
79.10
|
登录可见 |
P41664-50mg 尿素 [57-13-6] 分析标准品,Purity≥98% 50mg 113.00 促销价:79.10
|
| P41666-500g | 尿素 [57-13-6] | 药用 | 500g | 65.00 | 65.00 | 登录可见 |
P41666-500g 尿素 [57-13-6] 药用 500g 65.00
|
化学性质
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
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% |
| 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 |
危险性质
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
用途及存储
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。
生产方法
用二氧化碳和氨在高温、高压下合成氨基甲酸铵，经分解、吸收转化后，结晶，分离、干燥而成。
密封干燥保存。
