It can be hydrolyzed to Mg(HS)2, and further hydrolyzed to Mg(OH)2 at higher temperatures. A solution of magnesium hydrosulfide can also be prepared by reacting hydrogen sulfide with magnesium oxide in suspension.
Magnesium hydrosulfide can be broken down into magnesium sulfide through hydrolysis and then further hydrolyzed into magnesium hydroxide under elevated temperatures.  A solution of magnesium hydrosulfide can be created by mixing hydrogen sulfide with magnesium oxide suspended in a liquid.