U5128

Sigma-Aldrich

Urea

ACS reagent, 99.0-100.5%

Synonym(s):
Carbonyldiamide, Carbamide
Linear Formula:
NH2CONH2
CAS Number:
Molecular Weight:
60.06
Beilstein/REAXYS Number:
635724
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.21

Quality Level

grade

ACS reagent

assay

99.0-100.5%

form

solid

impurities

≤0.01% Insoluble matter

ign. residue

≤0.01%

mp

132-135 °C (lit.)

solubility

H2O: soluble 480 g/L at 20 °C

density

1.335 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤5 ppm
sulfate (SO42-): ≤0.001%

cation traces

Fe: ≤0.001%
heavy metals (as Pb): ≤0.001%

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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General description

Urea is a colourless organic compound, without any odour. It is easily soluble in water.

Application

Urea has been used:
  • to adjust the urea nitrogen concentration to a preferred range in blood reservoir for evaluating the dialyzer urea clearance
  • to prepare standards to measure urea synthesis
  • to prepare standards for blood urea nitrogen assay

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.

Packaging

5, 100, 500 g in poly bottle
1 kg in poly bottle
5 kg in poly drum

Biochem/physiol Actions

Urea participates in the metabolism of nitrogenous substances. It serves as a nitrogen source, when used in fertilizers. Urea is used in manufacturing chemical compounds. It is widely used in the agricultural industry as a fertilizer as well as an animal feed additive, which is used as a nitrogen supplement in animal husbandry. Urea has adverse effects on seed germination, seedling growth and early plant growth in soil.

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves

RIDADR

NONH for all modes of transport

WGK Germany

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis
Certificate of Origin
Hemodialyzer mass transfer-area coefficients for urea increase at high dialysate flow rates
Leypoldt JK, et al.
Kidney International, 51(6), 2013-2017 (1997)
CHAPTER 16 - METHODS OF FEEDING UREA TO LIVESTOCK
Urea As a Protein Supplement, 321-327 (1967)
Transplantation of bone marrow-derived MSCs improves cisplatinum-induced renal injury through paracrine mechanisms
Cheng K, et al.
Experimental and Molecular Pathology, 94(3), 466-473 (2013)
Hepatic targeting and biodistribution of human fetal liver stem/progenitor cells and adult hepatocytes in mice
Cheng K, et al.
Hepatology, 50(4), 1194-1203 (2009)
Elimination of the adverse effects of urea fertilizer on seed germination, seedling growth, and early plant growth in soil
Bremner JM and Krogmeier MJ
Proceedings of the National Academy of Sciences of the USA, 85(13), 4601-4604 (1988)

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