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等级
puriss.
质量水平
方案
99.0-100.5%
99.0-101.0% (calc. on dry substance)
表单
solid
质量
meets analytical specification of Ph. Eur., BP, USP
杂质
alkalic reac. substances, complies
≤0.001% heavy metals (as Pb)
≤0.04% insoluble in ethanol
≤0.05% ammonium (NH4)
≤0.1% biuret(carbamylurea)
灼烧残渣
≤0.1% (as SO4)
缺失
≤1.0% loss on drying, 105 °C, 1 h
mp
132-135 °C (lit.)
132-135 °C
溶解性
H2O: soluble 480 g/L at 20 °C
密度
1.335 g/mL at 25 °C (lit.)
痕量阴离子
chloride (Cl-): ≤10 mg/kg
sulfate (SO42-): ≤50 mg/kg
痕量阳离子
Fe: ≤0.5 mg/kg
适用性
in accordance for appearance of solution
in accordance for identity
官能团
amine
SMILES字符串
NC(N)=O
InChI
1S/CH4N2O/c2-1(3)4/h(H4,2,3,4)
InChI key
XSQUKJJJFZCRTK-UHFFFAOYSA-N
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一般描述
尿素是无色无味的固体。它晶体呈棱柱状。它与硝酸和草酸盐与草酸形成不溶性硝酸盐。在与烷烃或取代的烷烃反应时，它提供晶格包合化合物。
尿素可通过 Haber-Bosch 工艺由氨和二氧化碳制备。它也可用于制备脲醛树脂，通过缩合反应。
尿素可通过 Haber-Bosch 工艺由氨和二氧化碳制备。它也可用于制备脲醛树脂，通过缩合反应。
应用
尿素已用于以下研究：
- SnO2 纳米粒子的合成。
- 氨基甲酸酯、脲和氨基脲的合成。
- 酿酒酵母 Y15696 菌株分离蛋白的变性
- 蛋白质电泳研究。
用于蛋白质变性以及作为不溶性或变性蛋白的温和增溶剂。可用于从已由 6M 盐酸胍变性的样品(如包涵体)复性蛋白质。可与盐酸胍和二硫苏糖醇 (DTT) 一起用于复性变性蛋白以恢复其天然或活性形式。
储存分类代码
11 - Combustible Solids
WGK
WGK 1
闪点(°F)
Not applicable
闪点(°C)
Not applicable
个人防护装备
Eyeshields, Gloves, type N95 (US)
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