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
U0631
Urea
BioXtra, pH 7.5-9.5 (20 °C, 5 M in H2O)
Synonym(s):
Carbamide, Carbonyldiamide
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| Size/SKU | Availability | Price |
|---|
About This Item
product line
BioXtra
Quality Segment
assay
98.5-101.5%
form
powder, crystals or pellets
impurities
≤0.005% Phosphorus (P), ≤0.1% Insoluble matter
ign. residue
≤0.1%
pH
7.5-9.5 (20 °C, 5 M in H2O)
mp
132-135 °C (lit.)
solubility
H2O: 5 M at 20 °C, clear, colorless
density
1.335 g/mL at 25 °C (lit.)
anion traces
chloride (Cl-): ≤0.05%, sulfate (SO42-): ≤0.05%
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%
absorption
≤0.06 at 260 nm at 5 M, ≤0.06 at 280 nm at 5 M
application(s)
diagnostic assay manufacturing
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)
Application
1 of 1
This Item | |||
|---|---|---|---|
| assay 98.5-101.5% | assay ≥98% | assay 98.0-102.0% (HPLC) | assay - |
| application(s) diagnostic assay manufacturing | application(s) - | application(s) liquid formulation | application(s) liquid formulation |
| Quality Level 200 | Quality Level 200 | Quality Level 500 | Quality Level 500 |
| solubility H2O: 5 M at 20 °C, clear, colorless | solubility H2O: soluble 480 mg/mL, clear, colorless (8M) | solubility - | solubility - |
| form powder, crystals or pellets | form powder | form crystalline, solid | form granular |
| pH 7.5-9.5 (20 °C, 5 M in H2O) | pH - | pH 9 (20 °C, 100 g/L in H2O) | pH 9 |
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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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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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