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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
247537
Oxalic acid dihydrate
ACS reagent grade, ≥99%, 99.5-102.5% (ACS specification), solid
Synonym(s):
Ethanedioic acid dihydrate
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Product Name
Oxalic acid dihydrate, ACS reagent, ≥99%
InChI key
GEVPUGOOGXGPIO-UHFFFAOYSA-N
InChI
1S/C2H2O4.2H2O/c3-1(4)2(5)6;;/h(H,3,4)(H,5,6);2*1H2
SMILES string
[H]O[H].[H]O[H].OC(=O)C(O)=O
grade
ACS reagent
vapor density
4.4 (vs air)
vapor pressure
<0.01 mmHg ( 20 °C)
assay
≥99%, 99.5-102.5% (ACS specification)
form
solid
impurities
H2SO4, passes test (darkened), ≤0.001% N compounds, ≤0.005% insolubles
ign. residue
≤0.01%
Quality Level
pH
1.5 (10 g/L)
mp
104-106 °C (lit.)
solubility
water: 100 g/L at 25 °C
anion traces
chloride (Cl-): ≤0.002%, sulfate (SO42-): ≤0.005%
cation traces
Ca: ≤0.001%, Fe: ≤2 ppm, heavy metals: ≤5 ppm (by ICP-OES)
functional group
carboxylic acid
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This Item | 33506 | 1.00495 | 8.18242 |
|---|---|---|---|
| grade ACS reagent | grade ACS reagent, puriss. p.a. | grade ACS reagent | grade - |
| assay ≥99%, 99.5-102.5% (ACS specification) | assay ≥99.5% (manganometric) | assay 99.5-102.0% (manganometric) | assay ≥99% (manganometric) |
| Quality Level 200 | Quality Level 200 | Quality Level 300 | Quality Level 200 |
| form solid | form crystals | form solid | form solid |
| vapor density 4.4 (vs air) | vapor density 4.4 (vs air) | vapor density - | vapor density - |
| vapor pressure <0.01 mmHg ( 20 °C) | vapor pressure <0.01 mmHg ( 20 °C) | vapor pressure 0.000312 hPa ( 25 °C) | vapor pressure 0.000312 hPa ( 25 °C) |
Application
- As a catalyst in the preparation of tetrahydroquinoline derivatives via imino Diels-Alder reaction.[1]
- As a homogeneous catalyst in the preparation of highly functionalized piperidines via multi-component reaction.[2]
- As an oxidant for the formation of triazolinediones from corresponding urazoles and bisurazoles via oxidation.[3]
- In the transformation of thiols to nitrosothiols by reacting with sodium nitrite.[4]
General description
signalword
Danger
hcodes
Hazard Classifications
Acute Tox. 4 Dermal - Acute Tox. 4 Oral - Eye Dam. 1
Storage Class
11 - Combustible Solids
wgk
WGK 1
ppe
dust mask type N95 (US), Eyeshields, Gloves
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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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