Magnesium sulfate heptahydrate has superior chemical properties and a wide range of applications. So how do you distinguish between true and false? The detection method is generally as follows:
1. Distinguish from craftsmanship
The appearance of magnesium sulfate heptahydrate crystals is different according to different production processes. If the drying process is adopted, the surface moisture is relatively large and it is crystalline. The surface moisture is more likely to absorb moisture and agglomerate, and it will absorb more. Free water and other magazines; if the drying process is used, the surface moisture is relatively small, it is not easy to agglomerate, and the product is more smooth. The output from the drying process can be divided into 0.1-1mm, 0.2-3mm, And 2-4mm three sizes.
2, distinguish from raw materials
According to the raw materials used, the quality of the batch can be judged. Some manufacturers use waste acid to produce magnesium sulfate heptahydrate to save costs for customers. The color of magnesium heptahydrate produced from waste acid is not as good as that of original acid. Its main content也低于由ortho-acid, and its impurity content is relatively higher.
3. Pass the test
The good method is, of course, to determine the quality of it through third-party testing.