Colored Inorganic Chemicals Magnesium Sulfate Heptahydrate Granules
Colored Magnesium Sulfate Heptahydrate Granules (MgSO₄·7H₂O), dyed
in a vibrant yellow hue, are specially designed for industries that
require clear visual differentiation in blending, application, or
packaging processes. This product maintains all the chemical
integrity and functional performance of high-purity magnesium
sulfate heptahydrate while incorporating safe, non-toxic coloring
agents compliant with relevant safety and environmental
regulations.
Manufactured in compliance with USP, BP, EP, and CP quality
standards, these yellow-dyed granules offer both visual appeal and
precise nutrient delivery. The base compound, MgSO₄·7H₂O, contains
two essential secondary nutrients—magnesium and sulfur—vital for
plant metabolic processes, including chlorophyll production, enzyme
activation, and amino acid synthesis. The product also features
high water solubility, rapid dissolution, and consistent particle
size distribution, which makes it suitable for both direct
application and formulation into compound fertilizers.
The yellow coloring serves practical purposes in quality control
and traceability, helping operators visually identify the product
during storage, transport, and usage. It is particularly useful in
mixed formulations, where it helps confirm even distribution and
prevents cross-contamination errors. The coloring agents used are
water-soluble, non-reactive, and designed to fully degrade in
agricultural and environmental conditions, leaving no residue.
These dyed granules are commonly applied in precision agriculture,
hydroponic nutrient systems, landscaping, turf management, and
industrial processes requiring colored indicators. Their bright
appearance enhances product recognition while ensuring the same
high-performance nutrient profile as standard white magnesium
sulfate granules.
The product is available in multiple particle sizes and can be
customized upon request to meet the needs of automatic fertilizer
spreaders, controlled-release systems, or specific industrial
processing environments. Each batch undergoes rigorous quality
control to ensure conformity in color intensity, granule size, and
nutrient content.
The product is free-flowing, dust-minimized, and compatible with
most nitrogen, phosphorus, and potassium fertilizers. It is
non-hygroscopic under normal storage conditions and has a shelf
life of up to 24 months when stored properly in cool, dry
conditions away from direct sunlight.
| Specification | Anhydrous Magnesium Sulfate (MgSO₄) | Heptahydrate Magnesium Sulfate (MgSO₄·7H₂O) | Pentahydrate Magnesium Sulfate (MgSO₄·5H₂O) | Trihydrate Magnesium Sulfate (MgSO₄·3H₂O) | Dihydrate Magnesium Sulfate (MgSO₄·2H₂O) | Monohydrate Magnesium Sulfate (MgSO₄·H₂O) |
|---|
| Appearance | White powder | White crystalline powder or crystals | White crystalline powder or crystals | White crystalline powder or crystals | White crystalline powder or crystals | White crystalline powder or crystals |
| Main Content (%) | ≥99.5 | ≥99 | ≥99 | ≥99 | ≥99 | ≥98 |
| Magnesium (Mg) (%) | 9.80 | 11.31 | 13.65 | 15.23 | 17.21 | 19.6 |
| Sulfate (SO₄) (%) | 48.59 | 56 | 68 | 76 | 86 | 98 |
| Magnesium Oxide (MgO) (%) | 16.20 | 19.00 | 22.70 | 25.30 | 28.60 | 32.60 |
| pH (5% solution) | 5.0 - 9.2 | 5.0 - 9.2 | 5.0 - 9.2 | 5.0 - 9.2 | 5.0 - 9.2 | 5.0 - 9.2 |
| Iron (Fe) (%) | ≤0.0015 | ≤0.0015 | ≤0.0015 | ≤0.0015 | ≤0.0015 | ≤0.0015 |
| Chloride (Cl) (%) | ≤0.014 | ≤0.014 | ≤0.014 | ≤0.014 | ≤0.014 | ≤0.014 |
| Heavy Metals (Pb) (%) | ≤0.0006 | ≤0.0006 | ≤0.0007 | ≤0.0007 | ≤0.0008 | ≤0.0008 |
| Arsenic (As) (%) | ≤0.0002 | ≤0.0002 | ≤0.0002 | ≤0.0002 | ≤0.0002 | ≤0.0002 |
