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The difference between magnesium sulfate monohydrate and magnesium sulfate heptahydrate
- Jun 29, 2018 -

The most obvious difference between one water Magnesium Sulfate and seven water Magnesium Sulfate is the difference in appearance. A water Magnesium Sulfate is a white powder solid, and the seven water Magnesium Sulfate is a colorless and transparent crystal.

From the chemical structure, one water Magnesium Sulfate is a hydrated Magnesium Sulfate containing a crystalline water. The relative molecular mass is 138, and the crystalline water of the seven water Magnesium Sulfate is seven, and the relative molecular mass is 246. Therefore, the percentage of magnesium in the same quality of Magnesium Sulfate and seven water Magnesium Sulfate is seven times that of Magnesium Sulfate, which is 1.78 times that of Magnesium Sulfate.

In large-scale industrial production, both raw materials are sulfuric acid and Magnesium Oxide. But the products produced by the same process are also different. This is because some unscrupulous manufacturers use cheap industrial waste acid as raw materials to produce seven water Magnesium Sulfate, in order to reduce the cost of production, but this practice has a great potential for safety, which needs to be analyzed from the source of industrial waste acid.

The main sources of industrial waste acid are metallurgy and electroplating. A lot of acids will be used in metal surface treatment. When the metal and other impurities in the acid solution reach a certain concentration and the treatment effect can not meet the technological requirements, the acid solution needs to be reconstituted and replaced. In this process, a large number of waste acid liquids will be generated.  These waste acids contain high concentration of acid, and also contain heavy metals and inorganic impurities such as cobalt, titanium, chromium and arsenic. Once such an industrial waste acid has not been processed, it will enter the next production link, and its products will be polluted and even poisoned.

Such seven water Magnesium Sulfate products, once used in agricultural production, will have a bad effect on the soil they spread. The acid root ions and toxic heavy metals carried by impurities in industrial waste acid are enriched in soil and animals and plants, and eventually absorbed by the human body.

Relative to seven water Magnesium Sulfate, Magnesium Sulfate should be optimistic about using waste acid as raw material. Because of the character of one water Magnesium Sulfate itself, if waste acid is used as raw material, one water Magnesium Sulfate product will be gray black, not normal milk white, and the difference of color determines the product phase directly, so the multi - water Magnesium Sulfate manufacturers prefer high quality industrial sulphuric acid (concentration 94 - 98%) rather than industrial waste acid.

As the important component of aquatic feed and the core element in the compound fertilizer of magnesium supplement, the quality of Magnesium Sulfate is related to the quality of the whole product. For the agricultural enterprises such as feed and fertilizer, the selection of a Magnesium Sulfate supplier with superior quality and stable yield is the prerequisite and guarantee to ensure the overall quality of the products.