How Magnesium Sulfate Monohydrate Supports Rapid Plant Nutrition and Industrial Applications
Technical Introduction
Magnesium Sulfate Monohydrate (MgSO₄·H₂O) is a white crystalline or granular salt that provides magnesium (Mg) and sulfur (S), essential for chlorophyll production, enzyme activity, and protein synthesis.
Compared to the heptahydrate form, it contains slightly higher Mg concentration per unit weight and is used in fertilization, foliar sprays, and industrial applications.
Applications
1. Agriculture & Horticulture
Magnesium Fertilizer: Corrects magnesium and sulfur deficiencies in crops such as cereals, vegetables, and fruits.
Foliar Spray: Rapidly supplies magnesium for enhanced photosynthesis and plant growth.
Fertigation & Soil Amendment: Suitable for soil application and hydroponic systems.
2. Industrial Uses
Chemical Production: Used as a raw material for magnesium salts and chemicals.
Food & Pharmaceuticals: Acts as a mineral supplement and in certain processing applications.
3. Other Uses
Aquaculture: Supplies magnesium for aquatic species.
Advantages
Higher Magnesium Content: Slightly more concentrated than heptahydrate.
Fast-Acting: Soluble in water, allowing quick nutrient uptake.
Versatile: Can be used for foliar, soil, fertigation, and industrial applications.
Safe and Stable: Non-toxic and long shelf life under proper storage.
Typical Parameters
| Property | Value |
|---|---|
| Chemical Formula | MgSO₄·H₂O |
| Magnesium (Mg) Content | ~10–11% |
| Sulfur (S) Content | ~13% |
| Appearance | White crystalline or granular powder |
| Solubility in Water | 710 g/L at 20°C |
| pH (5% solution) | 5–6 |
| Purity | ≥ 98% |
| Shelf Life | 2 years in dry, sealed storage |
FAQs
Q1: How is magnesium sulfate monohydrate different from heptahydrate?
A1: Monohydrate has higher magnesium content per unit weight and contains only one water molecule, while heptahydrate contains seven water molecules and is slightly less concentrated.
Q2: Can it be used as a foliar spray?
A2: Yes, typically 1–2% solution for rapid magnesium correction.
Q3: Is it safe for crops and hydroponic systems?
A3: Yes, when applied according to recommended rates.
Q4: How quickly does it supply magnesium to plants?
A4: Foliar applications show results within a few days; soil application takes longer.
Q5: How should it be stored?
A5: Keep in a dry, sealed, ventilated area to prevent moisture absorption and caking.
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