Magnesium sulfate heptahydrate, 0.1–1 mm

Molecular formula: MgSO ₄  · nH ₂ O (n=0,1,2,3,4,5,6,7)
Molecular weight: 120.37 + 18n (n = 0, 1, 2, 3, 4, 5, 6, 7)
CAS No: 10034-99-8 (MgSO) ₄ · 7H ₂ O)
7487-88-9 (MgSO) ₄ )

Specifications (according to USP /BP/CP/EP standards)

Introduction to the uses of magnesium sulfate:
In the pharmaceutical field, it is used to formulate protective ointments, laxatives, analgesics, and antidotes, and can be processed into anticonvulsants, midecamycin, acetylspiramycin, creatinine, magnesium trisilicate, griseofulvin, salinomycin, natamycin, tobramycin, Shenyan Kang, gibberellin, and streptomycin sulfate, among others.
Used as a culture medium component in the microbial industry, as an additive in brewing, as a magnesium supplement for brewing water, and as a nutrient source during fermentation.
In the light industry, it is used as a stabilizer for calcium hydrogen phosphate in the production of fresh yeast, monosodium glutamate, beverages, mineral water, health-care salt, sea crystal, bathing products, "Budweiser"-type beer, and toothpaste.
Used in food additives as a nutritional supplement, firming agent, flavor enhancer, and processing aid;
In the chemical industry, it is used to produce other magnesium salts such as magnesium stearate, magnesium hydrogen phosphate, and magnesium oxide, as well as other sulfates such as potassium sulfate and sodium sulfate.
In the dyeing and printing industry, it is used as an alkali-resistant agent for printing and dyeing fine cotton and silk fabrics; it also serves as a weighting agent for cotton and silk. Additionally, it can be used as a filler in kapok products and in the production of rayon.
Used as a filler in the leather industry to enhance heat resistance;
In the electroplating industry, it is used as a conductive salt. When added to nickel plating solutions, it enhances the solution's conductivity, resulting in a white and soft plating layer. It also serves as an additive in aluminum refining, enabling coloration of the aluminum surface.
As a flame retardant for plastics such as acrylate resins, epoxy resins, unsaturated polyesters, and polyurethanes in the field of fire-retardant materials;
Used in industrial wastewater treatment for environmental protection.
In agriculture, magnesium sulfate is an excellent bimacronutrient fertilizer (containing both Mg and S). Both sulfur and magnesium are secondary macronutrients for crops—ranking as the fifth and sixth most important nutrients for plants. Not only does it increase crop yields, but it also enhances the flavor of fruits. Magnesium is a constituent of chlorophyll and pigments, serving as the metallic element present in the chlorophyll molecule. It promotes photosynthesis and facilitates the synthesis of carbohydrates, proteins, and fats.
It is used as a feed additive in animal husbandry, as a coagulant aid in the cement industry, and also in the manufacture of explosives, matches, ceramics, glass, pigments, pulp, and ABS resin, among other applications.