Oxalic acid dihydrate
SIGMA/75699 - BioUltra, ≥99.0% (RT)
Synonym: Ethanedioic acid dihydrate
CAS Number: 6153-56-6
Empirical Formula (Hill Notation): C2H2O4 · 2H2O
Molecular Weight: 126.07
EC Number: 205-634-3
MDL Number: MFCD00149102
Linear Formula: HO2CCO2H · 2H2O
Product Type: Chemical
| absorption | cut-off at 303 nm in H2O at 1 M |
| anion traces | chloride (Cl-): ≤5 mg/kg |
| sulfate (SO42-): ≤50 mg/kg | |
| assay | ≥99.0% (RT) |
| cation traces | Al: ≤5 mg/kg |
| As: ≤0.1 mg/kg | |
| Ba: ≤5 mg/kg | |
| Bi: ≤5 mg/kg | |
| Ca: ≤5 mg/kg | |
| Cd: ≤5 mg/kg | |
| Co: ≤5 mg/kg | |
| Cr: ≤5 mg/kg | |
| Cu: ≤5 mg/kg | |
| Fe: ≤2 mg/kg | |
| K: ≤50 mg/kg | |
| Li: ≤5 mg/kg | |
| Mg: ≤5 mg/kg | |
| Mn: ≤5 mg/kg | |
| Mo: ≤5 mg/kg | |
| Na: ≤50 mg/kg | |
| Ni: ≤5 mg/kg | |
| Pb: ≤5 mg/kg | |
| Sr: ≤5 mg/kg | |
| Zn: ≤5 mg/kg | |
| form | crystals |
| grade | biotech. grade |
| ign. residue (900 °C) | ≤0.01% (as SO4) |
| impurities | insoluble matter, passes filter test |
| ≤0.001% total nitrogen (N) | |
| InChI | 1S/C2H2O4.2H2O/c3-1(4)2(5 |
| InChI key | GEVPUGOOGXGPIO-UHFFFAOYSA |
| mp | 104-106 °C (lit.) |
| pH | ~1.0 (25 °C, 1 M in H2O) |
| product line | BioUltra |
| Quality Level | 100  |
| SMILES string | [H]O[H].[H]O[H].OC(=O)C(O |
| solubility | H2O: 1 M at 20 °C, clear, colorless |
| vapor density | 4.4 (vs air) |
| vapor pressure | <0.01 mmHg ( 20 °C) |
| 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 | 104-106 °C (lit.) |
| UNSPSC | 12161700 |