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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/449/386/product-dating-information-mk.pdf
1.00495
Oxalic acid dihydrate
for analysis EMSURE® ACS,ISO,Reag. Ph Eur
Synonym(s):
Oxalic acid dihydrate, Ethanedioic acid
About This Item
Recommended Products
grade
ACS reagent
Quality Level
Agency
reag. ISO
reag. Ph. Eur.
vapor pressure
0.000312 hPa ( 25 °C)
product line
EMSURE®
Assay
99.5-102.0% (manganometric)
form
solid
potency
375 mg/kg LD50, oral (Rat)
impurities
≤50 ppm Insoluble matter
ign. residue
≤100 ppm (as sulfate)
pH
1.5 (10 g/L in H2O)
bp
149-160 °C/1013 hPa (decomposition)
mp
98-100 °C
transition temp
flash point 157 °C (decomposition)
solubility
>100 g/L
density
1.65 g/cm3 at 20 °C
bulk density
813 kg/m3
anion traces
chloride (Cl-): ≤5 ppm
sulfate (SO42-): ≤50 ppm
cation traces
Ca: ≤10 ppm
Fe: ≤2 ppm
N: ≤10 ppm
heavy metals: ≤5 ppm
heavy metals (as Pb): ≤5 ppm
storage temp.
2-30°C
SMILES string
[O+H3].[O+H3].[O-]C(=O)C(=O)[O-]
InChI
1S/C2H2O4.2H2O/c3-1(4)2(5)6;;/h(H,3,4)(H,5,6);2*1H2
InChI key
GEVPUGOOGXGPIO-UHFFFAOYSA-N
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Application
- In Situ Investigation of a Self-Accelerated Cocrystal Formation by Grinding Pyrazinamide with Oxalic Acid.: This study investigates the in situ cocrystal formation of pyrazinamide and oxalic acid dihydrate, emphasizing the self-accelerating nature of the process and its implications for pharmaceutical development (Kulla et al., 2016).
- Deuterium MAS NMR studies of dynamics on multiple timescales: histidine and oxalic acid.: This article examines the dynamics of oxalic acid dihydrate and histidine using deuterium magnetic angle spinning nuclear magnetic resonance, providing insights into molecular motions on various timescales (Chan-Huot et al., 2015).
Analysis Note
Insoluble matter: ≤ 50 ppm
Chloride (Cl): ≤ 5 ppm
Sulfate (SO₄): ≤ 50 ppm
Total nitrogen (N): ≤ 10 ppm
Heavy metals (as Pb): ≤ 5 ppm
Heavy metals (ACS): ≤ 5 ppm
Ca (Calcium): ≤ 10 ppm
Fe (Iron): ≤ 2 ppm
Readily carbonisable substance: passes test
Residue on ignition (as sulfate): ≤ 100 ppm
Corresponds to ACS,ISO,Reag. Ph Eur
Legal Information
Signal Word
Danger
Hazard Statements
Precautionary Statements
Hazard Classifications
Acute Tox. 4 Dermal - Acute Tox. 4 Oral - Eye Dam. 1
Storage Class Code
11 - Combustible Solids
WGK
WGK 1
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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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