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51457

Urea solution

BioUltra, ~8 M in H2O

Synonym(s):

Carbamide, Carbonyldiamide

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About This Item

Linear Formula:
NH2CONH2
CAS Number:
57-13-6
Molecular Weight:
60.06
UNSPSC Code:
12352111
NACRES:
NA.25
PubChem Substance ID:
57651308
MDL number:
MFCD00008022
Beilstein/REAXYS Number:
635724
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product line

BioUltra

Quality Segment

100

concentration

~8 M in H2O

impurities

insoluble matter, passes filter test, ≤0.005% formaldehyde (HCHO), ≤0.05% biuret

refractive index

n20/D 1.40

pH

8.0-10.0 (25 °C)

anion traces

chloride (Cl-): ≤5 mg/kg, sulfate (SO42-): ≤10 mg/kg

cation traces

Al: ≤1 mg/kg, As: ≤0.1 mg/kg, Ba: ≤1 mg/kg, Bi: ≤1 mg/kg, Ca: ≤5 mg/kg, Cd: ≤1 mg/kg, Co: ≤1 mg/kg, Cr: ≤1 mg/kg, Cu: ≤1 mg/kg, Fe: ≤1 mg/kg, K: ≤20 mg/kg, Li: ≤1 mg/kg, Mg: ≤1 mg/kg, Mn: ≤1 mg/kg, Mo: ≤1 mg/kg, Na: ≤20 mg/kg, Ni: ≤1 mg/kg, Pb: ≤1 mg/kg, Sr: ≤1 mg/kg, Zn: ≤1 mg/kg

λ

neat

UV absorption

λ: 260 nm Amax: 0.03, λ: 280 nm Amax: 0.02

application(s)

advanced drug delivery

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), EPHX2(2053)
mouse ... Ephx2(13850)
rat ... Ppm1a(24666)

Application

Urea solution has been used as a urea buffer for the denaturation of heavy chain and β2m inclusion body preparations.[1] It has also been used as a component of 1x wash buffer to purify HIS-tagged microphthalmia-associated transcription factor (MITF).[2]

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Show Differences

1 of 1

This Item
U4883NIST2141RDD034
Urea solution BioUltra, ~8 M in H2O

Sigma-Aldrich

51457

Urea solution

Urea 8 M (after reconstitution with 16 mL high purity water)

Supelco

U4883

Urea

Urea NIST® SRM® 2141

NIST2141

Urea

Urea free-flowing, Redi-Dri™, Bioreagent, ≥98%

Sigma-Aldrich

RDD034

Urea

application(s)

advanced drug delivery

application(s)

-

application(s)

clinical testing

application(s)

-

Quality Level

100

Quality Level

100

Quality Level

100

Quality Level

100

pH

8.0-10.0 (25 °C)

pH

-

pH

-

pH

-

refractive index

n20/D 1.40

refractive index

-

refractive index

-

refractive index

-

UV absorption

λ: 260 nm Amax: 0.03, λ: 280 nm Amax: 0.02

UV absorption

-

UV absorption

-

UV absorption

-

cation traces

Al: ≤1 mg/kg, Ba: ≤1 mg/kg, Ca: ≤5 mg/kg, Co: ≤1 mg/kg, Cu: ≤1 mg/kg, K: ≤20 mg/kg, Mg: ≤1 mg/kg, Mo: ≤1 mg/kg, Ni: ≤1 mg/kg, Sr: ≤1 mg/kg, As: ≤0.1 mg/kg, Cd: ≤1 mg/kg, Fe: ≤1 mg/kg, Mn: ≤1 mg/kg, Pb: ≤1 mg/kg, Bi: ≤1 mg/kg, Li: ≤1 mg/kg, Zn: ≤1 mg/kg, Cr: ≤1 mg/kg, Na: ≤20 mg/kg

cation traces

-

cation traces

-

cation traces

-

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Storage Class

10 - Combustible liquids

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
BCCP4127
BCCN7061
BCCM8020
BCCL9779
BCCL6944

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Takuya Sekine et al.
Cell, 183(1), 158-168 (2020-09-28)
SARS-CoV-2-specific memory T cells will likely prove critical for long-term immune protection against COVID-19. Here, we systematically mapped the functional and phenotypic landscape of SARS-CoV-2-specific T cell responses in unexposed individuals, exposed family members, and individuals with acute or convalescent COVID-19. Acute-phase
Pakavarin Louphrasitthiphol et al.
Molecular cell, 79(3), 472-487 (2020-06-13)
It is widely assumed that decreasing transcription factor DNA-binding affinity reduces transcription initiation by diminishing occupancy of sequence-specific regulatory elements. However, in vivo transcription factors find their binding sites while confronted with a large excess of low-affinity degenerate motifs. Here, using
L Li et al.
Cell death and differentiation, 22(7), 1081-1093 (2014-12-20)
P53 is critically important in preventing oncogenesis but its role in inflammation in general and in the function of inflammatory macrophages in particular is not clear. Here, we show that bone marrow-derived macrophages exhibit endogenous p53 activity, which is increased
View All Related Papers

Global Trade Item Number

SKUGTIN
51457-100ML04061838177049
51457-500ML04061838177056

Questions

1–3 of 3 Questions  

  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/418/501/product-dating-information-06-25-mk.pdf

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  2. At what temperature is this product to be stored?

    1 answer

    1. This product should be stored in room temperature.

      Helpful?

  3. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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