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33247

Urea

ACS reagent grade, ≥99%, solid, puriss. p.a., reag. Ph. Eur.

Synonym(s):

Carbamide, Carbonyldiamide

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About This Item

Linear Formula:
NH2CONH2
CAS Number:
57-13-6
Molecular Weight:
60.06
NACRES:
NA.21
PubChem Substance ID:
57648752
UNSPSC Code:
12352100
EC Number:
200-315-5
MDL number:
MFCD00008022
Beilstein/REAXYS Number:
635724
Assay:
≥99%, 99-101% (calc. on dry substance)
Form:
solid

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Product Name

Urea, puriss. p.a., ACS reagent, reag. Ph. Eur., ≥99%

InChI key

XSQUKJJJFZCRTK-UHFFFAOYSA-N

InChI

1S/CH4N2O/c2-1(3)4/h(H4,2,3,4)

SMILES string

NC(N)=O

grade

ACS reagent, puriss. p.a.

agency

reag. Ph. Eur.

assay

≥99%, 99-101% (calc. on dry substance)

form

solid

impurities

alkalic reac. substances, complies, ≤0.0005% heavy metals (as Pb), ≤0.05% ammonium (NH4), ≤0.1% biuret

ign. residue

≤0.01% (as SO4)

loss

≤1.0% loss on drying, 105°C, 1 h

Quality Level

200

Gene Information

human ... CA1(759), CA2(760)
rat ... Ppm1a(24666)

mp

132-135 °C

solubility

H2O: soluble 480 g/L at 20 °C

density

1.335 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤5 mg/kg, sulfate (SO42-): ≤10 mg/kg

cation traces

Fe: ≤2 mg/kg

suitability

in accordance for appearance of solution, in accordance for identity

functional group

amine

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1 of 4

This Item
666122-M1.37030U4883
Urea puriss. p.a., ACS reagent, reag. Ph. Eur., ≥99%

Sigma-Aldrich

33247

Urea

Urea Molecular Biology Grade, End product of the urea cycle. A topical keratolytic agent.

Millipore

666122-M

Urea

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

SAFC

1.37030

Urea

Urea 8 M (after reconstitution with 16 mL high purity water)

Supelco

U4883

Urea

assay

≥99%, 99-101% (calc. on dry substance)

assay

≥98%

assay

98.0-102.0% (HPLC)

assay

-

Quality Level

200

Quality Level

100

Quality Level

500

Quality Level

100

solubility

H2O: soluble 480 g/L at 20 °C

solubility

water: soluble

solubility

-

solubility

H2O: soluble (1 vial plus 16 mL)

mp

132-135 °C (lit.)

mp

132-135 °C (lit.)

mp

132-135 °C (lit.)

mp

-

form

solid

form

solid

form

crystalline, solid

form

powder

density

1.335 g/mL at 25 °C (lit.)

density

1.335 g/mL at 25 °C (lit.)

density

1.335 g/mL at 25 °C (lit.)

density

-

General description

Urea is a colorless, odorless solid. It has prism-like crystals. It forms insoluble nitrate salts with nitric acid and oxalate salts with oxalic acid. On reaction with alkanes or substituted alkanes, it affords crystal-lattice inclusion compounds.[1]
Urea is the most commonly used slow release nitrogen fertilizer.[2]

Application

Urea has been used in the following studies:
  • Synthesis of SnO2 nanoparticles.[3]
  • Synthesis of urethanes, ureides and semicarbazides.[1]
  • Denaturation of protein isolated from Saccharomyces cerevisiae Y15696 strain.[4]
  • Protein electrophoretic studies.[5]
Used for the denaturation of proteins and as a mild solubilization agent for insoluble or denatured proteins. Useful for renaturing proteins from samples already denatured with 6 M guanidine chloride such as inclusion bodies. May be used with guanidine hydrochloride and dithiothreitrol (DTT) in the refolding of denatured proteins into their native or active form.

Storage Class

11 - Combustible Solids

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

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Certificates of Analysis (COA)

Lot/Batch Number
BCCN2961
SDBB2451
SDBB1243
SDBB0875
STBL4385

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The Fertilizer Encyclopedia, 709-709 (2009)
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
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
Humaira Seema et al.
Nanotechnology, 23(35), 355705-355705 (2012-08-17)
Graphene sheets decorated with SnO(2) nanoparticles (RGO-SnO(2)) were prepared via a redox reaction between graphene oxide (GO) and SnCl(2). Graphene oxide (GO) was reduced to graphene (RGO) and Sn(2+) was oxidized to SnO(2) during the redox reaction, leading to a
L Li et al.
Cell death and differentiation, 22(7), 1081-1093 (2014-12-20)
P53 is critically important in preventing oncogenesis but its role in inflammation in general and in the function of inflammatory macrophages in particular is not clear. Here, we show that bone marrow-derived macrophages exhibit endogenous p53 activity, which is increased
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