Product Specification

Medium Granular Magnesium Sulfate Heptahydrate Inorganic Chemicals – White Crystalline Fertilizer Grade​

Medium Granular Magnesium Sulfate Heptahydrate (MgSO₄·7H₂O) is a high-purity, white crystalline substance widely recognized for its exceptional solubility, stability, and bioavailability of magnesium and sulfur. This product is produced to meet international quality standards such as USP, BP, EP, and CP, and is commonly used in both agricultural and industrial sectors. In granular form, it offers superior handling properties compared to fine powders, including reduced dust, improved flowability, and uniform particle size distribution, making it highly suitable for bulk blending, direct soil application, or use in automated spreading systems.

Chemically, magnesium sulfate heptahydrate consists of magnesium, sulfur, and water of crystallization. The medium granules typically range from 2 to 4 mm in diameter and retain all the key attributes of the pure salt, including a high assay (≥99.5%), low impurity levels, and excellent solubility in water. This makes the product effective in both fast-response fertilization and high-performance industrial processes.

Agricultural Applications:
In agriculture, medium granular magnesium sulfate heptahydrate is primarily used as a soil amendment and foliar spray to supply magnesium (Mg) and sulfur (S), two essential secondary nutrients that directly influence plant growth, chlorophyll production, and enzyme activation. Magnesium is the central atom in the chlorophyll molecule, and its deficiency leads to yellowing of leaves, poor root growth, and decreased crop yields. Sulfur, on the other hand, is vital for amino acid synthesis and protein formation.

The granular form allows for efficient application in both acidic and alkaline soils. It is especially beneficial in intensive farming of crops with high magnesium demands, such as potatoes, tomatoes, citrus fruits, grapes, peanuts, coffee, and rice. Additionally, it is compatible with nitrogen and potassium fertilizers and can be blended without caking or chemical interaction.

Industrial Applications:
Beyond agriculture, this product is also widely used in various industrial applications:

Pharmaceuticals: As an excipient or active ingredient in laxatives, electrolyte replacement therapy, and magnesium supplements.

Chemical Manufacturing: As a precursor for producing other magnesium compounds like magnesium stearate and magnesium oxide.

Food & Beverage Industry: As a fortifier in mineral water and as a processing aid in brewing and tofu production.

Dyeing & Textile Industry: As a mordant and leveling agent to ensure uniform dye absorption.

Electroplating Industry: Enhances conductivity of nickel plating solutions and improves deposit quality.

Pulp & Paper Manufacturing: Used in chemical pulping processes and as a bleaching agent.

Construction Materials: Applied as a setting accelerator in cement formulations.

Environmental Protection: Used in flue gas desulfurization and wastewater treatment to reduce heavy metal ion concentrations.

Advantages of Medium Granular Form:

Improved handling with minimal dust during transport and application

Consistent granule size ensures uniform distribution and nutrient release

Suitable for use in automated fertilizer blending systems

Fast dissolution enables rapid nutrient uptake by crops

Long shelf life with excellent physical stability

Compliance and Safety:
The product is manufactured under strict quality control protocols and complies with multiple international pharmacopoeia and chemical standards. Heavy metals, arsenic, and chloride levels are maintained within safe limits, making it suitable for sensitive applications including pharmaceuticals and food processing.