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
U6504
Urea
suitable for electrophoresis
Synonym(s):
Carbamide, Carbonyldiamide
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$200.00
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InChI key
XSQUKJJJFZCRTK-UHFFFAOYSA-N
InChI
1S/CH4N2O/c2-1(3)4/h(H4,2,3,4)
SMILES string
NC(N)=O
assay
≥98%
form
powder or crystals
technique(s)
electrophoresis: suitable
impurities
≤0.005% Ammonia
Quality Level
Gene Information
human ... CA1(759), CA2(760)
rat ... Ppm1a(24666)
mp
132-135 °C (lit.)
solubility
H2O: 100 mg/mL
density
1.335 g/mL at 25 °C (lit.)
cation traces
Fe: ≤5 ppm, Pb: ≤5 ppm
absorption
≤0.06 at 260 at 5 M, ≤0.06 at 280 at 5 M
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This Item | |||
|---|---|---|---|
| Quality Level 200 | Quality Level 200 | Quality Level 200 | Quality Level 100 |
| technique(s) electrophoresis: suitable | technique(s) - | technique(s) - | technique(s) - |
| assay ≥98% | assay 98.5-101.5% | assay 99.0-100.5%, 99.0-101.0% (calc. on dry substance) | assay ≥98% |
| solubility H2O: 100 mg/mL | solubility H2O: 5 M at 20 °C, clear, colorless | solubility H2O: soluble 480 g/L at 20 °C | solubility - |
| form powder or crystals | form powder, crystals or pellets | form solid | form - |
| cation traces Fe: ≤5 ppm, Pb: ≤5 ppm | cation traces Al: ≤0.0005%, Ca: ≤0.001%, Cu: ≤0.0005%, Fe: ≤0.0005%, K: ≤0.005%, Mg: ≤0.0005%, NH4+: ≤0.05%, Na: ≤0.005%, Pb: ≤0.001%, Zn: ≤0.0005% | cation traces Fe: ≤0.5 mg/kg | cation traces - |
Application
Storage Class
11 - Combustible Solids
wgk
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
ppe
Eyeshields, Gloves, type N95 (US)
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Product Information Sheet
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How can I determine the shelf life / expiration / retest date of this product?
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How is shipping temperature determined? And how is it related to the product storage temperature?
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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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