On the issue of whether magnesium oxide is expired, how to detect whether magnesium oxide is expired, let's take a look at it! Electrical-grade magnesium oxide
At first, it is the beginning of the inspection. Under normal circumstances, magnesium oxide should be white powder. If magnesium oxide changes, the face will change. In addition, if the low whiteness of magnesium oxide can be observed, the obvious change (agglomeration, etc.) of magnesium oxide is not uniform in nature, and it is usually not used.
Then check the storage terms of magnesium oxide: if you do not do moisture-proof homework during storage and transportation, it may cause magnesium oxide denaturation and lose the use cost. In normal operation, you can use the following route to build magnesium oxide to prevent water absorption and degeneration. 1, cover the plastic film on the top, and lay the plastic film on the ground. If you are unwilling to change the bag, you can choose this step by step moisture-proof;