Merck
All Photos(1)

Documents

15604

Sigma-Aldrich

Urea

puriss., meets analytical specification of Ph. Eur., BP, USP, 99.0-100.5%, 99.0-101.0% (calc. on dry substance)

Sign Into View Organizational & Contract Pricing

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

puriss.

Quality Level

Assay

99.0-100.5%
99.0-101.0% (calc. on dry substance)

form

solid

quality

meets analytical specification of Ph. Eur., BP, USP

impurities

alkalic reac. substances, complies
≤0.001% heavy metals (as Pb)
≤0.04% insoluble in ethanol
≤0.05% ammonium (NH4)
≤0.1% biuret(carbamylurea)

ign. residue

≤0.1% (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

density

1.335 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤10 mg/kg
sulfate (SO42-): ≤50 mg/kg

cation traces

Fe: ≤0.5 mg/kg

suitability

in accordance for appearance of solution
in accordance for identity

SMILES string

NC(N)=O

InChI

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

InChI key

XSQUKJJJFZCRTK-UHFFFAOYSA-N

Looking for similar products? Visit Product Comparison Guide

Compare Similar Items

View Full Comparison

Show Differences

1 of 4

This Item
U5128U4884U4883
vibrant-m

15604

Urea

vibrant-m

U5128

Urea

vibrant-m

U4884

Urea

vibrant-m

U4883

Urea

assay

99.0-100.5%, 99.0-101.0% (calc. on dry substance)

assay

≤0.001% (Heavy Metals by ICP-OES, metals basis), 99.0-100.5%

assay

98.0-102.0%

assay

-

Quality Level

200

Quality Level

200

Quality Level

200

Quality Level

100

mp

132-135 °C (lit.)

mp

132-135 °C (lit.)

mp

132-135 °C (lit.)

mp

-

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

-

form

solid

form

solid

form

solid

form

powder

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 can be prepared from ammonia and carbon-dioxide, via Haber-Bosch process. It can also be used to prepare urea-formaldehyde resins, via condensation reaction.

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

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Documents related to the products that you have purchased in the past have been gathered in the Document Library for your convenience.

Visit the Document Library

Difficulty Finding Your Product Or Lot/Batch Number?

Product numbers are combined with Pack Sizes/Quantity when displayed on the website (example: T1503-25G). Please make sure you enter ONLY the product number in the Product Number field (example: T1503).

Example:

T1503
Product Number
-
25G
Pack Size/Quantity

Additional examples:

705578-5MG-PW

PL860-CGA/SHF-1EA

MMYOMAG-74K-13

1000309185

enter as 1.000309185)

Having trouble? Feel free to contact Technical Service for assistance.

Lot and Batch Numbers can be found on a product's label following the words 'Lot' or 'Batch'.

Aldrich Products

  • For a lot number such as TO09019TO, enter it as 09019TO (without the first two letters 'TO').

  • For a lot number with a filling-code such as 05427ES-021, enter it as 05427ES (without the filling-code '-021').

  • For a lot number with a filling-code such as STBB0728K9, enter it as STBB0728 without the filling-code 'K9'.

Not Finding What You Are Looking For?

In some cases, a COA may not be available online. If your search was unable to find the COA you can request one.

Request COA

Customers Also Viewed

Slide 1 of 7

1 of 7

Urea British Pharmacopoeia (BP) Reference Standard

BP350

Urea

Urea crystalline, EMPROVE® EXPERT, Ph. Eur., BP, JP, USP, ACS

SAFC

1.37030

Urea

Urea European Pharmacopoeia (EP) Reference Standard

U0600000

Urea

Urea Pharmaceutical Secondary Standard; Certified Reference Material

Supelco

PHR1406

Urea

Urea for synthesis

Sigma-Aldrich

8.18710

Urea

Urea NIST® SRM® 2141

NIST2141

Urea

Urea BioXtra, pH 7.5-9.5 (20 °C, 5 M in H2O)

Sigma-Aldrich

U0631

Urea

Nova I and Tronconi E et al.
Urea-SCR Technology for deNOx after treatment of Diesel Exhausts (2014)
Braun D, et al. et al.
Polymer Synthesis: Theory and Practice: Fundamentals, Methods, Experiments ; with 31 Tables (2001)
Genna L Andrews et al.
Analytical chemistry, 83(13), 5442-5446 (2011-05-31)
The TripleTOF 5600 System, a hybrid quadrupole time-of-flight mass spectrometer, was evaluated to explore the key figures of merit in generating peptide and protein identifications that included spectral acquisition rates, data quality, proteome coverage, and biological depth. Employing a Saccharomyces
Joost P J J Hegmans et al.
The American journal of pathology, 164(5), 1807-1815 (2004-04-28)
Exosomes are small membrane vesicles secreted into the extracellular compartment by exocytosis. Tumor exosomes may be involved in the sampling of antigens to antigen presenting cells or as decoys allowing the tumor to escape immune-directed destruction. The proteins present in
Eagleson M.
Concise Encyclopedia Chemistry, 1137-1137 (1994)

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service