Oxalic acid
SIAL/75688 - puriss. p.a., anhydrous, ≥99.0% (RT)
Synonym: Ethanedioic acid
CAS Number: 144-62-7
Empirical Formula (Hill Notation): C2H2O4
Molecular Weight: 90.03
EC Number: 205-634-3
MDL Number: MFCD00002573
Linear Formula: HO2CCO2H
Product Type: Chemical
| anion traces | chloride (Cl-): ≤50 mg/kg |
| sulfate (SO42-): ≤350 mg/kg | |
| assay | ≥99.0% (RT) |
| cation traces | Ca: ≤10 mg/kg |
| Cd: ≤5 mg/kg | |
| Co: ≤5 mg/kg | |
| Cr: ≤5 mg/kg | |
| Cu: ≤5 mg/kg | |
| Fe: ≤35 mg/kg | |
| K: ≤50 mg/kg | |
| Mg: ≤5 mg/kg | |
| Mn: ≤5 mg/kg | |
| Na: ≤50 mg/kg | |
| Ni: ≤5 mg/kg | |
| Pb: ≤5 mg/kg | |
| Zn: ≤5 mg/kg | |
| form | crystals |
| grade | anhydrous |
| puriss. p.a. | |
| ign. residue | ≤0.01% (as SO4) |
| impurities | ≤0.001% total nitrogen (N) |
| ≤1% water | |
| InChI | 1S/C2H2O4/c3-1(4)2(5)6/h( |
| InChI key | MUBZPKHOEPUJKR-UHFFFAOYSA |
| mp | 189.5 °C (dec.) (lit.) |
| Quality Level | 200  |
| SMILES string | OC(=O)C(O)=O |
| vapor density | 4.4 (vs air) |
| vapor pressure | <0.01 mmHg ( 20 °C) |
| Application: | Oxalic acid may be used in the preparation of the following: • ammonium oxalate • calcium oxalate • chlorine dioxide (ClO2) • potassium hydrogenoxalate |
| General description: | Oxalic acid is a dicarboxylic acid. It reacts with aqueous iron(II) salt solutions to afford iron(III) oxalate. |
| Symbol |   GHS05,GHS07 |
| Signal word | Danger |
| Hazard statements | H302 + H312 - H318 |
| Precautionary statements | P264 - P270 - P280 - P301 + P312 - P302 + P352 + P312 - P305 + P351 + P338 |
| Hazard Codes | Xn |
| Risk Statements | 21/22-41 |
| Safety Statements | 26-36-37-39 |
| RIDADR | NONH for all modes of transport |
| WGK Germany | WGK 1 |
| Purity | ≥99.0% (RT) |
| mp | 189.5 °C (dec.) (lit.) |
| UNSPSC | 12352100 |