Potassium Hydrogen Oxalate
Potassium Acid Oxalate
- CAS
- 127-95-7
- EC
- 204-873-0
- Sectors
- Textiles, Leather & Paper, Mining & Metals
Potassium Hydrogen Oxalate (CAS 127-95-7) is a colorless monoclinic crystalline potassium salt of oxalic acid, supplied as a white crystalline powder that acts as a reducing agent in redox reactions and is used in dye manufacturing, leather tanning, photographic emulsions and metal polishing pastes. It decomposes at high temperatures releasing carbon dioxide, commonly synthesized from potassium hydroxide and oxalic acid for industrial purity.
Typical Properties
| Molecular formula | C2H2O4.K |
|---|---|
| Molecular weight | 128.13 g/mol |
| Appearance | white crystalline powder |
| Form | Solid |
| Color | Monoclinic, colorless crystals |
| Melting point | >300°C |
| Density | 2.0 g/cm³ |
| Water solubility | soluble 40 parts cold H2O, 6 parts boiling H2O [MER06] |
| GHS signal word | Danger · Corrosive, Irritant / harmful, Health hazard |
| 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.
Potassium Hydrogen Oxalate
Applications
Applied in photographic emulsions for development control; in metal polishing pastes for shine enhancement; in dye manufacturing as fixatives; in analytical chemistry for standard solutions; and in leather tanning for pH adjustment in hide preparation.
Safety & Risks
Toxic if swallowed, causing hyperoxaluria and potential renal failure; strong irritant to mucous membranes. Avoid contact with oxidizers to prevent violent decomposition; implement fume extraction and full-face shields for safe manipulation in confined spaces.
Packaging
Packaged in 20 kg vented fiberglass-reinforced plastic bins with moisture indicators. Secure in ventilated chemical depots, elevated to avoid floor-level contamination risks.