Product Description
Magnesium sulfate heptahydrate, defined by the chemical formula MgSO4·7H2O, is an odorless crystalline substance distinguished by its white or colorless needle-shaped or oblique columnar crystal structure. During thermal decomposition, this hydrated salt undergoes a gradual, stage-by-stage loss of its crystalline water molecules, eventually transforming into anhydrous magnesium sulfate. Thanks to its adaptable properties, the compound finds extensive application in various industrial fields, including fertilizer production, leather processing, printing and dyeing, catalyst manufacturing, papermaking, plastics, ceramics, pigments, matches, explosives, and fireproof materials.
In the realm of textile dyeing, magnesium sulfate heptahydrate plays a vital role in the treatment of delicate cotton and silk fabrics. It serves a dual purpose: acting as a weighting agent to enhance the density and texture of cotton fibers, and functioning as a filler in kapok products to improve their structural stability and aesthetic appeal. In the medical field, this compound is prized for its purgative properties, often used as a purgative salt to assist in intestinal cleansing and address specific gastrointestinal disorders under the guidance of medical professionals.
The unique combination of its physical characteristics, such as water solubility and distinct crystalline structure, and chemical behaviors, including thermal decomposition rates, establishes magnesium sulfate heptahydrate as an indispensable material in both industrial manufacturing and specialized medical applications. Its ability to fulfill multiple functions across diverse sectors underscores its significance as a versatile chemical compound in contemporary industry and healthcare.
Product Parameters
| Item |
Specification |
| Purity %min |
99 |
| MgSO4 |
48.59 |
| MgO %min |
16.24 |
| Mg %min |
9.88 |
| PH (5% Solution) |
5.0-9.2 |
| Iron(Fe) % max |
0.0015 |
| Cl %max |
0.014 |
| Heavy metal (as Pb)%max |
0.0006 |
| (As)%max |
0.0002 |
Application
Paper and Packaging: Used as a pulp filler, it improves paper whiteness and tear strength in printing and packaging paper. In cardboard processing, it serves as a waterproofing agent component, enhancing resistance to humidity.
Environmental and Water Treatment, As a coagulant in wastewater treatment, it aids in removing heavy metals (e.g., lead) by forming insoluble hydroxides. It also regulates soil pH and reduces heavy metal bioavailability in contaminated soils, supporting phytoremediation efforts.
Agricultural and Soil Amendment
As a dual-nutrient fertilizer, magnesium sulfate heptahydrate supplies essential magnesium and sulfur for plant growth. Magnesium, a core component of chlorophyll, enhances photosynthetic efficiency, while sulfur supports amino acid and enzyme synthesis. It is widely used to correct magnesium deficiency in crops like citrus, potatoes, and tomatoes, improving yield by up to 15%. As a soil conditioner, it neutralizes acidic soils, improves structure, and enhances nutrient availability, particularly in regions with leached or sandy soils.
Industrial Manufacturing
Textile and Leather Industries: In textile dyeing, it acts as a weighting agent for cotton and silk, adsorbing dyes to enhance fabric density and handfeel. In kapok products, it serves as a filler to improve thermal insulation and structural stability. For leather tanning, it regulates the pH of tanning liquors, facilitating the penetration of vegetable tannins and enhancing leather softness, especially for high-end vegetable-tanned leather.
Chemical and Material Production: As a catalyst or intermediate, it synthesizes magnesium compounds (e.g., magnesium oxide, magnesium hydroxide) and functions as a desiccant in organic synthesis. In plastics and rubbers, it acts as a flame retardant in PVC and epoxy resins, while also increasing hardness as a filler in artificial leather and shoe soles.
Packaging & Shipping
Environmental Control Essentials
Maintain storage conditions at ≤30°C and ≤60% relative humidity in cool, dry zones to prevent hygroscopic moisture uptake or efflorescence. Avoid thermal fluctuations exceeding 67.5°C, as this triggers autodissolution of the compound in its crystalline water.
Packaging and Isolation Standards
Use hermetic containers (e.g., PE-lined sacks or airtight steel drums) to shield against atmospheric moisture, which causes caking or dehydration-related instability.
Segregate from acidic/alkaline chemicals, volatile substances, and strong oxidizers per hazardous material regulations to prevent reactive degradation.
Warehouse Management Practices
Implement ventilated storage with palletized stacking (≥15 cm ground clearance) to ensure unobstructed airflow and prevent damp surface contact.
Employ opaque coverings or shaded areas to mitigate thermal decomposition risks from prolonged sunlight exposure.
Summary Highlights:
Thermal-Humidity Control: Strict temperature/humidity thresholds to prevent physical degradation (autodissolution, efflorescence).
Packaging Integrity: Airtight containers and chemical segregation as core safeguards against moisture and reactivity.
Operational Protocols: Ventilation, palletization, and light shielding to maintain product stability in industrial storage systems.
Certifications and Reviews
Company Profile
Shandong Jiuchong Chemical Company Limited was founded in 2016, which is located in Weifang City, Shandong Province, China. We have 228 square meters of office space. Now Jiuchong chemical is a large modern international chemical enterprise with more than 28 series. Since our establishment, the company has gradually established and improved a sound supply chain system, quality monitoring system and service system, ensuring products quality and service.
At the same time, relying on our own geographical location and resource advantages, our company is committed to the optimization of a variety of chemical supply chain, including magnesium chloride, sodium metabisulfite, sodium bicarbonate, calcium chloride, magnesium sulfate, polyaluminium chloride, aluminium sulfate, industrial salt, soda ash etc.
Our products are sold well in 288 domestic cities and more than 36 foreign countries. Now the company has won the praise and trust of domestic and foreign customers. Based on stable quality and output, good team service and staff efforts, we will continue to develop domestic and foreign markets.Jiuchong chemical takes "integrity, innovation and development" as the concept, puts integrity in the priority position in serving customers, and guarantees high quality products and satisfactory cooperation for customers experience. Your satisfaction is our driving force. Quality is the soul of enterprise and that is what we have always done. In the future, Shandong Jiuchong Chemical Company Limited hopes to build a brilliant tomorrow with you!
FAQ
Q: How long is your delivery time?
A: It usually takes 7-10 days if the goods are in stock, or 10-15 days if the goods are not, depending on the quantity ordered.
Q: Can you support OEM ?
A: Yes, we can make products as your request.
Q: Do you provide samples?
A: Yes, we could offer the sample for free by requests but are not responsible for the freight cost.
Q: What payment terms do you accept?
A: We accept T/T, L/C at sight;
Audited Supplier 
){kind=link}