Magnesium sulphate heptahydrate the third party inspection

As a magnesium sulfate heptahydrate manufacturer(Tianjin Xingyu Fertilizer Industry Co., Ltd.), before we load the container, we always inspect our Magnesium sulphate timely, however, we will choose the famous inspection department to test, because it is recognized worldwide.

Regarding to the inspection, we usually test the MgSO4.7H2O assay, Mg content and free moisture and insouble water matter. And the inspection standard is GB/T26568-2011, We will do daily test by this standard.

The result of the inspection are as below:

Test Items	Unit	Result	Standard No.
MgSO4.7H2O	%	>99.9	GB/T26568-2011
Water soluble MgO	%	>16.45	GB/T26568-2011
Water soluble Mg	%	>9.92	GB/T26568-2011
Free Moisture	%	<4.93	GB/T26568-2011
Water insoluble matter	%	<0.05	GB/T26568-2011

As we all know, the purity of Magnesium sulphate heptahydrate is very important, it decided the Mg and S content

in our products, because more Mg and S, then, the cron plant will grow more healthy. So it can become the good

helper for farmers. As China standard requirement, the first grade assay of magnesium sulphate heptahydrate should 

be 99.5%, however, our mass production products' assay can up to 99.99% high purity.