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Oxalic acid dihydrate acts as an analytical reagent, as a reducing agent for photographic films and as a mordant in dyeing process. It is used as a plating agent, a surface treating agent, a grinding agent, a precipitating agent in rare-earth mineral processing, a bleaching agent in textile and a purifying agent in pharmaceutical industry. It plays an important role in antibiotic medication like oxytetracycline and chloramphenicol. It finds application in water treatment plants to remove calcium waste water. It is also used as a buffer in chromatographic separation as well as bleach for wood, removing black stains caused by water penetration.
For a brief feature on uses as a very useful Bronsted acid in organic synthesis, see: Synlett, 2838 (2004).
Stash, A. I.; Chen, Y. S.; Kovalchukova, O. V.; Tsirelson, V. G. Electron density, electrostatic potential, and spatial organization of ammonium hydrooxalate oxalic acid dihydrate heteromolecular crystal from data of diffraction experiment at 15 K using synchrotron radiation and theoretical calculations. Russ. Chem. Bull. 2013, 62 (8), 1752-1763.
Mokhtary, M.; Qandalee, M.; Niaki, M. R. Highly Efficient Selective Oxygenation of Sulfides to Sulfoxides by Oxalic Acid Dihydrate in the Presence of H2O2. J. Chem. 2012, 9 (2), 863-868.
Dichiarazioni di rischio (UE): H302-H312-H318
Harmful if swallowed. Harmful in contact with skin. Causes serious eye damage.
Dichiarazioni precauzionali: P260-P201-P280h-P304+P340-P405-P501a
Do not breathe dust/fume/gas/mist/vapours/spray. Obtain special instructions before use. Wear protective gloves/clothing. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.