Oxalic acid
CAS Number: 144-62-7
Chemical Formula: C2H2O4
Synonyms: Oxalic acid anhydrous, Ethanedionic acid
Appearance: Colorless transparent crystal
HS Code: 29171110
MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)
Oxalic acid is a strong dicarboxylic acid that occurs naturally in numerous flowers and vegetables, usually in the form of calcium or potassium oxalate salts. It is the unique chemical compound where two carboxyl groups are directly bonded together, making oxalic acid one of the most powerful organic acids. Similar to formic acid and unlike most other carboxylic acids, it is readily oxidized, which enables its wide use as a reducing agent in photographic processing, bleaching applications, and ink stain removal.
Parameters
| Property | Value |
| Melting point | 189.5 °C (dec.)(lit.) |
| Boiling point | 365.1°C (estimate) |
| density | 0.99 g/mL at 25 °C |
| bulk density | 750kg/m3 |
| vapor density | 4.4 (vs air) |
| vapor pressure | <0.01 mm Hg ( 20 °C) |
| refractive index | 1.4261 (estimate) |
| Fp | 101-157°C |
| storage temp. | Store below +30°C. |
| solubility | water: soluble108g/L at 25°C |
| form | Liquid |
| pka | 1.23(at 25℃) |
| color | White |
| PH Range | 6 – 8 at 25 °C |
| PH | 3(1 mM solution);2.09(10 mM solution);1.31(100 mM solution); |
| Odor | odorless |
| Water Solubility | 90 g/L (20 ºC) |
| Sublimation | 101-157 ºC |
| Merck | 14,6911 |
| BRN | 385686 |
| Henry’s Law Constant | 1.43 at pH 4 (quoted, Gaffney et al., 1987) |
| Exposure limits | NIOSH REL: TWA 1, STEL 2, IDLH 500; OSHA PEL: TWA 1; ACGIH TLV: TWA 1, STEL 2 (adopted). |
| Stability: | Stable, but moisture sensitive. Incompatible with metals. |
| InChIKey | MUBZPKHOEPUJKR-UHFFFAOYSA-N |
| LogP | -1.7 at 23℃ |
| CAS DataBase Reference | 144-62-7(CAS DataBase Reference) |
| NIST Chemistry Reference | Oxalic acid(144-62-7) |
| EPA Substance Registry System | Oxalic acid (144-62-7) |
Safety Information
| Item | Details |
| Hazard Codes | Xn |
| Risk Statements | 21/22-63-34-41 |
| Safety Statements | 24/25-23-36/37/39-27-26-39-37-36-36/37 |
| RIDADR | UN 3261 8/PG 3 |
| OEB | C |
| OEL | TWA: 1 mg/m3, STEL: 2 mg/m3 |
| WGK Germany | 1 |
| RTECS | RO2450000 |
| TSCA | Yes |
| HazardClass | 8 |
| PackingGroup | III |
| HS Code | 29171110 |
| Hazardous Substances Data | 144-62-7(Hazardous Substances Data) |
| Toxicity | LD50 orally in Rabbit: 375 mg/kg |
| IDLA | 500 mg/m3 |
Product Application of Oxalic acid CAS# 144-62-7
1. Oxalic acid is widely applied as a reducing agent and bleaching agent, mordant in dyeing and printing industries. It is also used for rare metal refining, synthesis of various oxalate esters, amides, oxalates and other chemical products.
2. Used as an analytical reagent in laboratory and industrial analysis.
3. Used as laboratory reagent, chromatographic analysis reagent, dye intermediate and reference standard material.
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