Oxalic Acid Dihydrate

Details:

<p>  </p> <table border="1"> <tbody> <tr> <td> Formula:</td> <td> H_{<font size="2">2</font>}C_{<font size="2">2</font>}O_{<font size="2">4</font>}(2H_{<font size="2">2</font>}O)</td> </tr> <tr> <td> Formula Weight:</td> <td> 126.07</td> </tr> <tr> <td> CAS No:</td> <td> 6153-56-6</td> </tr> <tr> <td class="tbl_style" colspan="2"> General Description</td> </tr> <tr> <td> Typical appearance:</td> <td> White Colorless Solid</td> </tr> <tr> <td> Analytical use:</td> <td> Reducing agent, Preparation fcertain metals</td> </tr> <tr> <td> Change in state (approximate):</td> <td id="mp-oad"> Melting Point, Hydrated Acid, 110°C; Anhydrous Acid, 189°C</td> </tr> <tr> <td> Aqueous solubility:</td> <td> 14G in 100 mL at 20°C</td> </tr> <tr> <td> Density:</td> <td> 1.65</td> </tr> <tr> <td> pKa:</td> <td> 1.3</td> </tr> <tr> <td class="tbl_style" colspan="2"> Specification</td> </tr> <tr> <td> Assay</td> <td> ....... 99.5-102.5% H_{<font size="2">2</font>}C_{<font size="2">2</font>}O_{<font size="2">4</font>}(2H_{<font size="2">2</font>}O)</td> </tr> <tr> <td id="td-s"> Substances darkened by hot sulfuric acid</td> <td> ....... Passes test</td> </tr> <tr> <td class="tbl_style" colspan="2"> Maximum Allowable</td> </tr> <tr> <td> Insoluble matter</td> <td> ....... 0.005%</td> </tr> <tr> <td> Residue after ignition</td> <td> ....... 0.01%</td> </tr> <tr> <td> Chloride (Cl)</td> <td> ....... 0.002%</td> </tr> <tr> <td> Sulfate (SO_{<font size="2">4</font>})</td> <td> ....... 0.005%</td> </tr> <tr> <td> Calcium (Ca)</td> <td> ....... 0.001%</td> </tr> <tr> <td> Nitrogen compounds (as N)</td> <td> ....... 0.001%</td> </tr> <tr> <td> Heavy metals (Pb)</td> <td> ....... 5 ppm</td> </tr> <tr> <td> Irons (Fe)</td> <td> ....... 2 ppm</td> </tr> </tbody> </table> <p>  </p>