h4 class="subsubheading" id="Description-22"><span>Description<a class="copiable-link" href="#Description-22"> &para;</a></span></h4>

<p>These data are from a chemical experiment to prepare a standard curve for the
determination of formaldehyde by the addition of chromatropic acid and
concentrated sulphuric acid and the reading of the resulting purple color on
a spectrophotometer.
</p>
<h4 class="subsubheading" id="Format-21"><span>Format<a class="copiable-link" href="#Format-21"> &para;</a></span></h4>

<