Oxalic Acid
Ethanedioic Acid, Wood Bleach
- CAS
- 6153-56-6
- EC
- 612-167-2
- Sectors
- Mining & Metals, Textiles, Leather & Paper
Oxalic Acid (CAS 6153-56-6) is the dihydrate form of ethanedioic acid, a white crystalline organic acid supplied as a powder that is soluble in water and alcohol and acts as a reducing and chelating agent in metal cleaning, leather tanning and textile dyeing.
Typical Properties
| Molecular formula | C2H2O4.2H2O |
|---|---|
| Molecular weight | 126.07 g/mol |
| Appearance | white crystals |
| Form | Powder/Solid |
| Color | Yellow to yellow-green |
| Melting point | 102 °C |
| Boiling point | 102 °C |
| Density | 1.65 g/cm³ @ Temp: 25 °C |
| Water solubility | 138 g/L (20 °C) |
| Flash point | 157°C |
| pH | ~1.0 (25°C, 1M in H2O) |
| GHS signal word | Danger · Corrosive, Irritant / harmful, Health hazard |
| HS code | 29171100 |
| Grades available | Technical Grade |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
Oxalic Acid
Applications
Used in metal cleaning, leather tanning, and textile dyeing. It also serves in pharmaceutical synthesis, rare earth separation, and rust removal. In laboratories, it’s a standard reagent for calcium precipitation.
Safety & Risks
Toxic if ingested; corrosive to skin and eyes. Handle with gloves and avoid inhalation.
Packaging
Supplied in 25 kg paper or polyethylene bags. Store in a cool, dry, and well-ventilated area away from oxidizers.