<p><span class="h-card" translate="no"><a href="https://mastodon.social/@whitequark" class="u-url mention">@<span>whitequark</span></a></span> <span class="h-card" translate="no"><a href="https://is-a.cat/@pl0myk" class="u-url mention">@<span>pl0myk</span></a></span><br />I think it is less "remains not in contact with oxygen" than "does not encounter a source of oxygen". Some magnesium reacting is probably not an issue for you unless your supply of oxygen is limited, but I once bought 10kg of magnesium and am yet to run out of it.</p>
