Oxalic acid
Core Product Advantages
CAS Number: 144-62-7
Chemical Formula: C2H2O4
Synonyms: ETHANEDIOIC ACID DICARBOXYLIC ACID C2 DI-CARBOXYLIC ACID
Appearance: White Solid
MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)
Oxalic acid is a strong dicarboxylic acid present in many plants and vegetables, typically as calcium or potassium salts. It is the only organic compound with two directly connected carboxyl groups, making it one of the strongest organic acids. Like formic acid, it is easily oxidized, so it is widely used as a reducing agent in photography, bleaching, and ink removal. It is commonly produced by heating sodium formate with sodium hydroxide to form sodium oxalate, converting it to calcium oxalate, then treating with sulfuric acid to release free oxalic acid.
Chemical Properties
| Item | Specification |
| Melting point | 189.5 °C (dec.)(lit.) |
| Boiling point | 365.1°C (estimate) |
| bulk density | 750kg/m3 |
| density | 0.99 g/mL at 25 °C |
| 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: soluble 108g/L at 25°C |
| form | Solid |
| pka | 1.23(at 25℃) |
| color | White |
| Odor | odorless |
| PH | 3(1 mM solution);2.09(10 mM solution);1.31(100 mM solution) |
| PH Range | 6 – 8 at 25 °C |
| 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 | Specification |
| 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
Oxalic acid is mainly used as a reducing agent, bleaching agent, and mordant in dyeing and printing. It is also applied in rare earth metal refining, synthesis of oxalate esters, amides, and oxalates.It serves as an analytical reagent, laboratory standard, chromatographic reagent, and dye intermediate.It is used in manufacturing antibiotics, borneol, and as a solvent for rare metal extraction. It acts as a tanning agent, textile bleach, metal and marble cleaner, and catalyst raw material. It is widely used to produce diethyl oxalate, sodium oxalate, calcium oxalate, and other derivatives.
Supply & Delivery
Fast delivery time
Inventory: 2-3 working days
New production: 7-10 working days
Reviews
There are no reviews yet.