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/449/386/product-dating-information-mk.pdf
223433
Sodium oxalate
ACS reagent, ≥99.5%
Synonym(s):
Ethanedioic acid sodium salt, Oxalic acid disodium salt
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About This Item
Recommended Products
grade
ACS reagent
description
neutrality passes test
assay
≥99.5%
form
powder
impurities
hot H2SO4, passes test (darkened)
≤0.005% insolubles
loss
≤0.01% loss on drying
anion traces
chloride (Cl-): ≤0.002%
sulfate (SO42-): ≤0.002%
cation traces
Fe: ≤0.001%
K: ≤0.005%
NH4+: ≤0.002%
heavy metals (as Pb): ≤0.002%
SMILES string
[Na+].[Na+].[O-]C(=O)C([O-])=O
InChI
1S/C2H2O4.2Na/c3-1(4)2(5)6;;/h(H,3,4)(H,5,6);;/q;2*+1/p-2
InChI key
ZNCPFRVNHGOPAG-UHFFFAOYSA-L
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Related Categories
1 of 4
This Item | 71800 | 71804 | 379735 |
|---|---|---|---|
| form powder | form powder or crystals | form - | form powder |
| assay ≥99.5% | assay ≥99.5% (RT) | assay >99.5% | assay ≥99.99% trace metals basis |
| Quality Level 200 | Quality Level 200 | Quality Level 100 | Quality Level 200 |
| grade ACS reagent | grade ACS reagent, puriss. p.a. | grade reference material | grade - |
| impurities hot H2SO4, passes test (darkened), ≤0.005% insolubles | impurities ≤0.002% ammonium (NH4) | impurities - | impurities ≤100.0 ppm Trace Metal Analysis |
| cation traces Fe: ≤0.001%, NH4+: ≤0.002%, K: ≤0.005%, heavy metals (as Pb): ≤0.002% | cation traces Ca: ≤100 mg/kg, Cd: ≤10 mg/kg, Co: ≤5 mg/kg, Cr: ≤5 mg/kg, Cu: ≤5 mg/kg, Fe: ≤10 mg/kg, K: ≤50 mg/kg, Mg: ≤10 mg/kg, Mn: ≤50 mg/kg, Ni: ≤5 mg/kg, Pb: ≤5 mg/kg, Zn: ≤5 mg/kg | cation traces - | cation traces - |
General description
Application
related product
signalword
Warning
hcodes
Hazard Classifications
Acute Tox. 4 Dermal - Acute Tox. 4 Oral
Storage Class
11 - Combustible Solids
wgk_germany
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
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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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