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8.18710

Sigma-Aldrich

Urea

for synthesis

Synonym(s):

Carbamide, Carbonyl diamide, Diaminomethanone, Carbonyldiamine, Carbamide, Carbonyldiamide

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About This Item

Linear Formula:
NH2CONH2
CAS Number:
Molecular Weight:
60.06
Beilstein/REAXYS Number:
635724
MDL number:
UNSPSC Code:
12352111
EC Index Number:
200-315-5
NACRES:
NA.22

vapor pressure

<0.1 hPa ( 20 °C)

Quality Level

potency

8471 mg/kg LD50, oral (Rat)
8200 mg/kg LD50, skin (Rat)

pH

9 (20 °C, 100 g/L in H2O)

mp

132-135 °C (lit.)

solubility

1000 g/L

density

1.335 g/mL at 25 °C (lit.)

bulk density

720‑760 kg/m3

storage temp.

2-30°C

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

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.

Analysis Note

Assay (ex N): ≥ 99.0 %
Melting range (lower value): ≥ 132 °C
Melting range (upper value): ≤ 135 °C
Identity (IR): passes test

Storage Class

11 - Combustible Solids

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable


Certificates of Analysis (COA)

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