Oxalic acid dihydrate
SIAL/247537 - ACS reagent, ≥99%
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
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.
This image depicts SKU: 247537-100G
This image depicts SKU: 247537-100G
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.
This image depicts SKU: 247537-500G
This image depicts SKU: 247537-500G
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.
This image depicts SKU: 247537-2.5KG
This image depicts SKU: 247537-2.5KG
| anion traces | chloride (Cl-): ≤0.002% |
| sulfate (SO42-): ≤0.005% | |
| assay | ≥99% |
| 99.5-102.5% (ACS specification) | |
| cation traces | Ca: ≤0.001% |
| Fe: ≤2 ppm | |
| heavy metals: ≤5 ppm (by ICP-OES) | |
| form | solid |
| grade | ACS reagent |
| ign. residue | ≤0.01% |
| impurities | H2SO4, passes test (darkened) |
| ≤0.001% N compounds | |
| ≤0.005% insolubles | |
| InChI | 1S/C2H2O4.2H2O/c3-1(4)2(5 |
| InChI key | GEVPUGOOGXGPIO-UHFFFAOYSA |
| mp | 104-106 °C (lit.) |
| Quality Level | 200  |
| SMILES string | [H]O[H].[H]O[H].OC(=O)C(O |
| vapor density | 4.4 (vs air) |
| vapor pressure | <0.01 mmHg ( 20 °C) |
| Application: | Oxalic acid dihydrate may be used: • As a catalyst in the preparation of tetrahydroquinoline derivatives via imino Diels-Alder reaction. • As a homogeneous catalyst in the preparation of highly functionalized piperidines via multi-component reaction. • As an oxidant for the formation of triazolinediones from corresponding urazoles and bisurazoles via oxidation. • In the transformation of thiols to nitrosothiols by reacting with sodium nitrite. |
| General description: | Oxalic acid dihydrate is a promising candidate as a phase change material (PCM) for use in thermal energy storage (TES) technology due to its high heat of fusion and energy storage density/price ratio in comparison to other salt hydrates PCMs. |
| Packaging: | 100, 500 g in poly bottle |
| Packaging: | 2.5 kg in poly bottle |
| 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%; 99.5-102.5% (ACS specification) |
| mp | 104-106 °C (lit.) |
| UNSPSC | 12352100 |