1. Magnesium sulfate 
MgSO4; melting point 1124 ° C; density 2.66 g / mL 
magnesium sulfate, or anhydrous magnesium sulfate, is a magnesium-containing compound, anhydrous magnesium sulfate is a commonly used chemical reagent and desiccant, but Magnesium sulphate is often referred to as magnesium sulfate heptahydrate, which is a small white oblique or oblique columnar crystal. It is odorless and bitter. It is clinically used for catharsis, choleretic, anticonvulsant, tetanus, hypertension, etc. 
2. Chemical properties: It is white or colorless needle-like or oblique columnar crystal, odorless, cool and slightly bitter, molecular weight: 246.47, specific gravity 1.68, soluble in water, slightly soluble in ethanol and glycerin, soluble in its own crystal water at 67.5 °C. Decomposed by heat, 70, 80 ° C is the loss of four molecules of crystal water. At the 200 ° C of the month, all the crystal water was lost to an anhydrate. It is easily weathered into powder in air (dry), and gradually removes crystal water into anhydrous magnesium sulfate when heated. This product does not contain any toxic impurities. Magnesium sulfate heptahydrate is easier to weigh than anhydrous magnesium sulfate because it is not easily dissolved, which facilitates quantitative control in the industry.

3. Classification: 
Magnesium sulfate often refers to magnesium sulfate heptahydrate (because it is not easy to dissolve, it is easier to weigh than anhydrous magnesium sulfate, which is convenient for quantitative control in industry.) There are also water, dihydrate, and trihydrate. Pentahydrate, anhydrous magnesium sulfate. 
Magnesium sulfate heptahydrate has industrial grade and feed grade, granular, according to the size of 0.1-1mm, 1-3mm, 2-4mm three. 
Others such as anhydrous, monohydrate, dihydrate, and magnesium sulfate trihydrate are in powder form.

GB: Magnesium Sulfate (Magnesium Sulfate Heptahydrate) CAS: 10034-99-8 GB? HG/T 2680-2009 
IV. Commonly used packaging: 25Kg/bag 50kg/bag

1 Anhydrous magnesium sulfate 
Anhydrous magnesium sulfate, chemical formula MgSO4, colorless orthorhombic fine crystals. Soluble in water, ethanol, glycerin, not used in acetone. Used in the pharmaceutical and printing and dyeing industries, it can also be used as a desiccant, fertilizer, compound fertilizer, and also a raw material for the production of magnesium oxide. 
Content: 99% 
Particle size: Particles 
Anhydrous magnesium sulfate detection index 
2 Magnesium sulfate monohydrate 
white powder, density 2.66/ cm³ . Soluble in water, slightly soluble in alcohol, insoluble in acetone, because magnesium is one of the main components of chlorophyll. People usually use magnesium sulfate monohydrate as a fertilizer and mineral water additive. The advantage of magnesium sulfate over other fertilizers is High solubility 
Content:: 99% 
Particle size: Particles 
Uses: Fertilizer 
Test standard 
3 magnesium sulfate dihydrate 
4 magnesium sulfate trihydrate 
Uses is compound fertilizer
5. Main use of magnesium chloride: mainly used in medicine, microbiology, light industry, chemical industry, printing and dyeing industry, pharmaceutical industry, electroplating industry, smelting industry. Used as fertilizer in agriculture; can be used as feed additive; used in the manufacture of explosives, matches, porcelain, glass, pigments, ABS resin; as a flame retardant for plastics such as acrylate resin in fireproof materials; Sewage treatment. Magnesium sulfate heptahydrate is used in the light industry for the production of fresh yeast, monosodium glutamate, beverages; in the chemical industry, it is used in the manufacture of other magnesium salts such as magnesium stearate, magnesium hydrogen phosphate, magnesium oxide, and other sulfates such as potassium sulfate and sodium sulfate; It is used as a filler in fireproof materials to enhance heat resistance; in pharmaceuticals, magnesium sulfate is processed into drugs such as laxatives, anticonvulsants, magnesium trisilicate, melamycin, acetylspiramycin and muscles. In the fertilizer industry, the use of magnesium fertilizers has played a major role in the growth of plants. Magnesium sulfate is used in the food industry for lactic acid, MSG, and the like. Used as a filler in the tanning industry; as a conductive salt in the electroplating industry; as a dyeing agent for fabrics, a weighting agent, and a magnesium dye in printing and dyeing. In addition, it is used in industrial sewage treatment to condense and set the waste liquid sewage to meet the discharge standard.

Feed grade magnesium sulfate 
feed grade magnesium sulfate is used as a supplement for magnesium in feed processing. Magnesium is a factor that can not be deleted when participating in bone formation and muscle contraction in livestock and poultry. It is an activator of various enzymes in livestock and poultry. The metabolism of matter and nerve function play a major role. If the body is magnesium, it will lead to material metabolism and neurological dysfunction in the livestock, supply disorders, affect growth and even death. 
Uses 
1 Agricultural application: Magnesium is the core element of chlorophyll. It can strengthen the plant reduction process, improve the resistance, promote the activation of enzymes, make the soil loosened and powerful, promote the development of roots, fully absorb nutrients, and make plants more lush. Sulfur is the main component of proteins and enzymes in plants, promoting root growth. It enhances the metabolism and redox of plants, thereby promoting the growth of crops and increasing yield. Therefore, magnesium sulfate is an ideal raw material for making compound fertilizer. It can be mixed with NPK according to different needs to form compound fertilizer or mixed fertilizer. It can also be mixed with one or more kinds of raw materials into various fertilizers and photosynthetic fertilizers. Actual comparison experiment of nine crops such as rubber tree, tobacco, tea, vegetable, potato, etc. Magnesium-containing compound fertilizer can grow 15-20% of crops than magnesium-free compound fertilizer. 
2 Industrial application: used in the manufacture of zinc strontium powder and other zinc The raw material of salt is also an important auxiliary material for viscose fiber and vinylon fiber. It is also used as wood and leather agent, bone gel clarification and protection agent and for electroplating flotation. 
3 Pharmaceuticals: Pharmaceutical magnesium sulfate can be processed into laxative, anti-drug Convulsions, magnesium trisilicate, melamycin acetylspiramycin and creatinine 
4 food applications: in the food industry, Shanghai magnesium sulfate can be used as lactic acid MSG and other 
5 feed applications: on the feed, magnesium sulfate is a kind The main additive 
6 printing and dyeing application: magnesium sulfate can be used as dyeing agent for fabric dyeing agent in printing and dyeing. 
7 In industrial sewage treatment: industrial production produces a lot of sewage, magnesium sulfate can be used for waste. Liquid sewage acts as a coagulation sedimentation