Sodium hydrogenoxalate

Sodium hydrogenoxalate is the sodium salt of hydrogenoxalate. The only difference from oxalic acid is that one of the two hydrogen atoms has been replaced with a sodium atom. Like oxalate, it is toxic for the kidney function if swallowed because of the precipitation of poorly soluble calcium oxalate stones that can obstruct the kidney tubules.[6]

Sodium hydrogenoxalate
Names
IUPAC name
Sodium hydrogen oxalate[1]
Other names
Ethanedioate, hydrogen sodium salt (1:1:1)
Ethanedioic acid, sodium salt (1:1)
Monosodium oxalate
Sodium hydrogen ethanedioate (1:1:1)
Oxalic acid sodium salt
Oxalic acid, sodium salt
Sodium acid oxalate
Sodium and hydrogen and oxalate
Sodium bioxalate[2]
Identifiers[3][4]
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.013.356
EC Number
  • 214-691-3
UNII
Properties
C2HNaO4
Molar mass 112.0167[5]
Hazards
GHS pictograms
GHS Signal word Warning
GHS hazard statements
 H302, H312
P264, P270, P280, P301+312, P302+352, P312, P322, P330, P363, P501
Related compounds
Other anions
 Sodium bicarbonate (oxalate replaced with carbonate)
Other cations
 Potassium hydrogenoxalate (potassium instead of sodium)
Oxalic acid (hydrogen instead of sodium)
Sodium oxalate (sodium instead of hydrogen)
Related compounds
 Hydrogenoxalate (sodium ion removed)
Hydrogenoxalate (sodium and hydrogen ions removed)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Stability

Upon being heated, sodium hydrogenoxalate undergoes cation-pairing to become oxalic acid and sodium oxalate, the latter of which decomposes into sodium carbonate and carbon monoxide.

2NaHC2O4 → Na2C2O4 + H2C2O4
Na2C2O4 → Na2CO3 + CO[7]
gollark: Well, it could be a salted hash, yes.
gollark: Okay, this still fits with absolutely none of my models.
gollark: 19 fountains is commented because I don't know if it actually happened.
gollark: ```pythonbids = [ "larger cat", "coliseum",# "19 fountains", "39 declinations", "agitated", "374777 apiogollarioforms"]```
gollark: Oh apiaristic forms my obelisk!

References
  1. "2T9TH558WS | C2HNaO4 | ChemSpider". www.chemspider.com. p. Names. Retrieved 11 September 2018. Sodium hydrogen oxalate [ACD/IUPAC Name]
  2. "2T9TH558WS | NaHC2O4 | ChemSpider". www.chemspider.com. p. Names. Retrieved 11 September 2018.
  3. "Monosodium oxalate". pubchem.ncbi.nlm.nih.gov. Retrieved 11 September 2018.
  4. "2T9TH558WS | NaHC2O4 | ChemSpider". www.chemspider.com. p. Names. Retrieved 11 September 2018.
  5. "Sodium Hydrogen Oxalate NaHC2O4 Molecular Weight — EndMemo". www.endmemo.com. Retrieved 11 September 2018. Molar Mass: 112.0167
  6. "Monosodium oxalate". pubchem.ncbi.nlm.nih.gov. Retrieved 11 September 2018. H302 (100%): Harmful if swallowed [Warning Acute toxicity, oral] H312 (100%): Harmful in contact with skin [Warning Acute toxicity, dermal]
  7. W. Balcerowiak; Cz. Latocha; J. Wasilewski (1980). "Thermoanalytical investigation of mixtures containing oxalic acid, sodium hydrogen oxalate and sodium oxalate". Journal of Thermal Analysis. 18: 57–63. doi:10.1007/BF01909453. A solid ternary system containing oxalic acid dihydrate, sodium hydrogen oxalate was subjected to thermoanalytical investigation to develop its full qualitative and quantitative analyses based on the following reactions of thermal decomposition of the individually heated compounds of this system [4-6]: H2C2O4 " 2 H2O -+ H2C2O4 + 2 H2O NaHC2O4 9 H2O -* NaHC2O4 + H2O 2 NaHC2O4 ~ Na2C2O4 + (H2C2O4) Na2C2O4 --, Na2CO3 + CO
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