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Merck
CN

51458

尿素

BioUltra, ≥99.5% (T)

别名:

碳酰二胺, 碳酰胺

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关于此项目

线性分子式:
NH2CONH2
化学文摘社编号:
57-13-6
分子量:
60.06
EC Number:
200-315-5
UNSPSC Code:
12352200
MDL number:
MFCD00008022
Beilstein/REAXYS Number:
635724

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product line

BioUltra

assay

≥99.5% (T)

impurities

insoluble matter, passes filter test, ≤0.005% formaldehyde (HCHO), ≤0.05% biuret

ign. residue

≤0.01% (as SO4)

loss

≤0.05% loss on drying, 20 °C (HV)

pH

8.0-10.0 (25 °C, 8 M in H2O)

mp

132-135 °C (lit.)

solubility

H2O: 8 M at 20 °C, clear, colorless

density

1.335 g/mL at 25 °C (lit.)

anion traces

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

cation traces

Al: ≤5 mg/kg, As: ≤0.1 mg/kg, Ba: ≤5 mg/kg, Bi: ≤5 mg/kg, Ca: ≤10 mg/kg, Cd: ≤5 mg/kg, Co: ≤5 mg/kg, Cr: ≤5 mg/kg, Cu: ≤5 mg/kg, Fe: ≤5 mg/kg, K: ≤50 mg/kg, Li: ≤5 mg/kg, Mg: ≤5 mg/kg, Mn: ≤5 mg/kg, Mo: ≤5 mg/kg, Na: ≤50 mg/kg, Ni: ≤5 mg/kg, Pb: ≤5 mg/kg, Sr: ≤5 mg/kg, Zn: ≤5 mg/kg

λ

8 M in H2O

UV absorption

λ: 260 nm Amax: 0.03, λ: 280 nm Amax: 0.02

SMILES string

NC(N)=O

InChI

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

InChI key

XSQUKJJJFZCRTK-UHFFFAOYSA-N

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Application

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。

Other Notes

Acetic acid -urea PAGE of proteins; In the extraction of mitochondrial complex V; Calibration of polyacrylamide gel columns for the separation of oligonucleotides by capillary electrophoresis; Tryptophan fluorescence in electron-transfer flavoprotein:ubiquinone oxidoreductase; Denaturation curve

存储类别

13 - Non Combustible Solids

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)

法规信息

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Resolution and reconstitution of complex V of the mitochondrial oxidative phosphorylation system: properties and composition of the membrane sector.
Y M Galante et al.
Archives of biochemistry and biophysics, 211(2), 643-651 (1981-10-15)
N J Watmough et al.
Biochemistry, 30(5), 1317-1323 (1991-02-05)
We have studied the intrinsic fluorescence of the 12 tryptophan residues of electron-transfer flavoprotein:ubiquinone oxidoreductase (ETF:QO). The fluorescence emission spectrum (lambda ex 295 nm) showed that the fluorescence is due to the tryptophan residues and that the contribution of the
B J Smith
Methods in molecular biology (Clifton, N.J.), 1, 63-73 (1984-01-01)
In SDS polyacrylamide gel electrophoresis, proteins are separated essentially on the basis of their sizes, by the sieving effect of the polyacrylamide gel matrix (see Chapter 6 ). In the absence of SDS, the proteins would still be subject to
Determination and analysis of urea and guanidine hydrochloride denaturation curves.
C N Pace
Methods in enzymology, 131, 266-280 (1986-01-01)
A Paulus et al.
Electrophoresis, 11(9), 702-708 (1990-09-01)
Polyacrylamide-filled gel columns are used to separate oligonucleotide samples. For homopolymeric standard samples, plots of migration time versus molecular size are presented over a range of 30-160 bases. With 2.5-4% T and 3.3% C gels, good resolution over the examined
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