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Merck

15604

Sigma-Aldrich

尿素

puriss., meets analytical specification of Ph. Eur., BP, USP, 99.0-100.5%, 99.0-101.0% (calc. on dry substance)

别名:

碳酰二胺, 碳酰胺

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About This Item

线性分子式:
NH2CONH2
CAS号:
分子量:
60.06
Beilstein:
635724
EC 号:
MDL编号:
UNSPSC代码:
12352100
PubChem化学物质编号:
NACRES:
NA.21
价格与库存信息目前不能提供

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。[1]
尿素可通过 Haber-Bosch 工艺由氨和二氧化碳制备。[2]它也可用于制备脲醛树脂,通过缩合反应。[3]

应用

尿素已用于以下研究:
  • SnO2 纳米粒子的合成。[4]
  • 氨基甲酸酯、脲和氨基脲的合成。[1]
  • 酿酒酵母 Y15696 菌株分离蛋白的变性[5]
  • 蛋白质电泳研究。[6]
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)


历史批次信息供参考:

分析证书(COA)

Lot/Batch Number

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Slide 1 of 7

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尿素 British Pharmacopoeia (BP) Reference Standard

BP350

尿素

尿素 crystalline, EMPROVE® EXPERT, Ph. Eur., BP, ChP, JP, USP, ACS

SAFC

1.37030

尿素

尿素 European Pharmacopoeia (EP) Reference Standard

U0600000

尿素

尿素 NIST® SRM® 2141

NIST2141

尿素

Braun D, et al. et al.
Polymer Synthesis: Theory and Practice: Fundamentals, Methods, Experiments ; with 31 Tables (2001)
Nova I and Tronconi E et al.
Urea-SCR Technology for deNOx after treatment of Diesel Exhausts (2014)
Eagleson M.
Concise Encyclopedia Chemistry, 1137-1137 (1994)
Joost P J J Hegmans et al.
The American journal of pathology, 164(5), 1807-1815 (2004-04-28)
Exosomes are small membrane vesicles secreted into the extracellular compartment by exocytosis. Tumor exosomes may be involved in the sampling of antigens to antigen presenting cells or as decoys allowing the tumor to escape immune-directed destruction. The proteins present in
Genna L Andrews et al.
Analytical chemistry, 83(13), 5442-5446 (2011-05-31)
The TripleTOF 5600 System, a hybrid quadrupole time-of-flight mass spectrometer, was evaluated to explore the key figures of merit in generating peptide and protein identifications that included spectral acquisition rates, data quality, proteome coverage, and biological depth. Employing a Saccharomyces

Questions

1–2 of 2 Questions  
  1. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer
    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

      Helpful?

  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer
    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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