<table class="table table-sm table-bordered" id="experimental-properties"><thead><tr><th class="head-medium">Property</th><th class="head-large">Value</th><th>Source</th></tr></thead><tbody><tr><td>melting point (°C)</td><td>255 °C</td><td>MSDS</td></tr><tr><td>boiling point (°C)</td><td>190ºC</td><td>Lide DR. CRC Handbook of Chemistry. 2004 </td></tr><tr><td>water solubility</td><td>149 mg/L (at 20 °C)</td><td>MSDS</td></tr><tr><td>logP</td><td>0.87</td><td>Agilent Technology. LC/MS/MS Analysis of Opiates. </td></tr><tr><td>pKa</td><td>8.21 (at 25 °C)</td><td>Agilent Technology. LC/MS/MS Analysis of Opiates. </td></tr></tbody></table>