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U5128

Sigma-Aldrich

Urea

ACS reagent, 99.0-100.5%

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

grade

ACS reagent

Quality Level

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

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This Item
156045145633247
Urea ACS reagent, 99.0-100.5%

Sigma-Aldrich

U5128

Urea

-
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

-
Urea BioUltra, for molecular biology, 99% (T)

Sigma-Aldrich

51456

Urea

Premium Grade
Urea puriss. p.a., ACS reagent, reag. Ph. Eur., ≥99%

Sigma-Aldrich

33247

Urea

-
form

solid

form

solid

form

powder or crystals

form

solid

mp

132-135 °C (lit.)

mp

132-135 °C (lit.)

mp

132-135 °C (lit.)

mp

132-135 °C (lit.)

solubility

H2O: soluble 480 g/L at 20 °C

solubility

H2O: soluble 480 g/L at 20 °C

solubility

H2O: 8 M at 20 °C, clear, colorless

solubility

H2O: soluble 480 g/L at 20 °C

density

1.335 g/mL at 25 °C (lit.)

density

1.335 g/mL at 25 °C (lit.)

density

1.335 g/mL at 25 °C (lit.)

density

1.335 g/mL at 25 °C (lit.)

Quality Level

200

Quality Level

200

Quality Level

200

Quality Level

200

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.

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.

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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