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Ammonium oxalate monohydrate is a diammonium salt of oxalic acid. Its refined crystal structure has been investigated by three-dimensional diffraction studies. Influence of bivalent [Mn(II), Co(II), Ni(II)] and trivalent cations [Fe(III), Cr(III)] impurities on the growth rates of ammonium oxalate monohydrate crystals has been described.
grade
ACS reagent
Quality Level
vapor pressure
<0.1 hPa ( 20 °C)
Assay
≥99%
99.0-101.0% (ACS specification)
form
crystalline powder
crystals or granules
impurities
≤0.005% insolubles
ign. residue
≤0.02%
pH
6-7 (25 °C, 14.2 g/L)
mp
133 °C (dec.) (lit.)
anion traces
chloride (Cl-): ≤0.002%
sulfate (SO42-): ≤0.002%
Rp 2.557.000
Rp 1.798.000
Rp 13.572.000
Rp 1.253.000
Rp 706.000
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