Magnesium sulfate heptahydrate
Magnesium sulfate heptahydrate, also known as bitter sulfur, bitter salt, cathartic salt and cathartic salt (chemical formula: MgSO4·7H2O), is a white or colorless needle-like or oblique columnar crystal, odorless, cool and slightly bitter. It is decomposed by heating, and the crystal water is gradually removed to become anhydrous magnesium sulfate. It is mainly used in the manufacture of fertilizers, tanning, printing and dyeing, catalysts, paper-making, plastics, porcelain, pigments, matches, explosives and fireproof materials. It can be used for printing and dyeing thin cotton cloth and silk, as a weighting agent for cotton silk and a filler for kapok products, and as a laxative in medicine.
- Product Content
Magnesium Sulphate Heptahydrate
Chemical Name: Magnesium sulphate heptahydrate
Molecular Formula: MgSO4.7H2O
Molecular Weight: 246.47
CAS No. : 10034-99-8
Properties
Magnesium sulphate heptahydrate do many benefits to crops. Magnesium sulphate has good water solubility, and can be absorbed by the crop easily, also it will soon make the folium return green, and reinforce the ability of photosynthesis. The density is 1.67-1.71g/cm3. Its melting point is 1124ºC. It is soluble in water,slight soluble in alcohol and diethyl ether, insoluble in acetone.
Composition
| Items | Specifications |
| Appearance | white crystalline powder |
| Assay | 99.0% min. |
| MgSO4 | 48.6% min. |
| Cl | 0.03% max. |
| MgO | 16.2% min. |
| Arsenis (As) | 2ppm max |
| Ferrous (Fe) | 15ppm max. |
| Plumbum (Pb) | 8ppm max. |
Application
Usually we use the foliage dressing of the magnesium fertilizer to remedy the magnesium deficiency for the fruiter, solanaceous vegetable, legume vegetable caused by the root barrier, In a general way, we will spray 1%-2% magnesium sulphate solution, application for 3-4 times, interval 7-10 days.
Packing
25kg plastic woven bag
Storage
Keep dry, not get wet when storing. Keep in cool, out-of-sun place.