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U6504

Sigma-Aldrich

Urea

suitable for electrophoresis

Synonym(s):

Carbamide, Carbonyldiamide

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About This Item

Linear Formula:
NH2CONH2
CAS Number:
57-13-6
Molecular Weight:
60.06
Beilstein:
635724
EC Number:
200-315-5
MDL number:
MFCD00008022
UNSPSC Code:
12352111
PubChem Substance ID:
24900435
NACRES:
NB.22

Assay

≥98%

Quality Level

200

form

powder or crystals

technique(s)

electrophoresis: suitable

impurities

≤0.005% Ammonia

mp

132-135 °C (lit.)

solubility

H2O: 100 mg/mL

density

1.335 g/mL at 25 °C (lit.)

cation traces

Fe: ≤5 ppm
Pb: ≤5 ppm

absorption

≤0.06 at 260 at 5 M
≤0.06 at 280 at 5 M

SMILES string

NC(N)=O

InChI

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

InChI key

XSQUKJJJFZCRTK-UHFFFAOYSA-N

Gene Information

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

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Application

A chaotropic agent used to solubilize and denature proteins for denaturing isoelectric focusing and two-dimensional electrophoresis.
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 Code

11 - Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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

Sigma-Aldrich

15604

Urea

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β-Amino thioesters are important natural building blocks for the synthesis of numerous bioactive molecules. An organocatalyzed Mannich reaction was developed which provides direct and highly stereoselective access to acyclic β(2)- and β(2,3,3)-amino thioesters with adjacent tertiary and quaternary stereocenters. Mechanistic
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