33247
Urea
puriss. p.a., ACS reagent, reag. Ph. Eur., ≥99%
Synonym(s):
Carbamide, Carbonyldiamide
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About This Item
Linear Formula:
NH2CONH2
CAS Number:
Molecular Weight:
60.06
Beilstein:
635724
EC Number:
MDL number:
UNSPSC Code:
12352100
PubChem Substance ID:
NACRES:
NA.21
grade
ACS reagent
puriss. p.a.
Quality Level
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
mp
132-135 °C (lit.)
132-135 °C
solubility
H2O: soluble 480 g/L at 20 °C
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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.
Urea is the most commonly used slow release nitrogen fertilizer.
Application
Urea has been used in the following studies:
- Synthesis of SnO2 nanoparticles.
- Synthesis of urethanes, ureides and semicarbazides.
- Denaturation of protein isolated from Saccharomyces cerevisiae Y15696 strain.
- Protein electrophoretic studies.
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
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