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1.00492

Oxalic acid dihydrate

EMPLURA®

Synonym(s):

Oxalic acid dihydrate, Ethanedioic acid

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About This Item

Linear Formula:
(COOH)2 · 2 H2O
CAS Number:
6153-56-6
Molecular Weight:
126.07
UNSPSC Code:
12352106
EC Index Number:
205-634-3
NACRES:
NA.21
MDL number:
MFCD00149102
Assay:
≥99% (manganometric)
Form:
solid
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vapor pressure

0.000312 hPa ( 25 °C)

Quality Segment

product line

EMPLURA®

assay

≥99% (manganometric)

form

solid

potency

375 mg/kg LD50, oral (Rat)

ign. residue

≤0.05% (800 °C 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)

density

1.65 g/cm3 at 20 °C

bulk density

813 kg/m3

anion traces

chloride (Cl-): ≤0.002%, sulfate (SO42-): ≤0.02%

cation traces

Fe: ≤0.001%, N: ≤0.005%, heavy metals (as Pb): ≤0.002%

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

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

Assay (manganometric): ≥ 99.0 %
Chloride (Cl): ≤ 0.002 %
Sulfate (SO₄): ≤ 0.02 %
Heavy metals (as Pb): ≤ 0.002 %
Total nitrogen (N): ≤ 0.005 %
Fe (Iron): ≤ 0.001 %
Residue on ignition (800 °C as sulfate): ≤ 0.05 %

Legal Information

EMPLURA is a registered trademark of Merck KGaA, Darmstadt, Germany

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Pictograms

CorrosionExclamation mark
GHS05,GHS07

Signal Word

Danger

Hazard Classifications

Acute Tox. 4 Dermal - Acute Tox. 4 Oral - Eye Dam. 1

Storage Class

11 - Combustible Solids

WGK

WGK 1

Hazard Codes

H302 + H312,H318

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