Magnesium Sulfate Monohydrate
- Appearance: White powder
- Chemical Formula: MgSO4·H2O
- CAS No.: 14168-73-1
- Magnesium Sulfate Monohydrate (MgSO4·H2O): > 98%
- Magnesium Oxide (MgO): > 27%
- Magnesium (Mg): > 16%
- Sulfur (S): > 21%
- Water Solubility: 100%
- Water-Insoluble Matter: < 0.1%
- Moisture: < 1.0%
- pH: 5.0-8.0 (1% solution)
Reference price range:USD 520 - 710
Magnesium Sulfate Monohydrate
Premium agricultural Magnesium Sulfate Monohydrate: high nutrient-density Mg/S raw material for professional fertilizer formulation
Ihumate Magnesium Sulfate Monohydrate (MgSO4·H2O, CAS 14168-73-1) is a high-purity, fully water-soluble agricultural magnesium-sulfur fertilizer raw material with MgSO4·H2O > 98%, MgO > 27%, Mg > 16% and sulfur (S) > 21%. The white powder grade is designed for water-soluble fertilizers, compound fertilizers, granulated fertilizers, foliar products, fertigation products and liquid fertilizer production.
1. Concentrated Mg and S nutrition: magnesium is central to chlorophyll, photosynthesis and assimilate transport, while sulfur supports amino acids, proteins, oils and flavor compounds.
2. Higher nutrient density than heptahydrate: with less crystal water, monohydrate supplies more MgO, Mg and S per unit weight, helping reduce freight load and reserve more formula space.
3. Built for fertilizer factories: it can be used in NPK, WSF, compound fertilizers, granules, EDTA micronutrients, humic acid, amino acid and seaweed systems as a reliable Mg/S nutrition module.
4. The Ihumate advantage: batch control covers assay, MgO, Mg, sulfur, insoluble matter, moisture, pH, appearance and dissolution performance, backed by COA, SDS, export documents, dependable supply, formulation support and OEM/ODM packaging.
Compatibility note: avoid direct concentrated mixing with phosphates, carbonates and strong alkaline materials. With calcium fertilizers or micronutrients, run a jar test and use A/B tanks where needed.
Magnesium Sulfate Monohydrate Specifications
| Technical Parameters | Detailed Specs | Testing Methods | Reference Standards |
|---|---|---|---|
| Appearance | White powder | Visual inspection | - |
| Chemical Formula | MgSO4·H2O | - | - |
| CAS No. | 14168-73-1 | - | - |
| Magnesium Sulfate Monohydrate (MgSO4·H2O) | > 98% | EDTA titration | - |
| Magnesium Oxide (MgO) | > 27% | EDTA titration | - |
| Magnesium (Mg) | > 16% | EDTA titration | - |
| Sulfur (S) | > 21% | Calculated value | - |
| Water Solubility | 100% | Visual and gravimetric method | - |
| Water-Insoluble Matter | < 0.1% | Gravimetric method | - |
| Moisture | < 1.0% | Oven drying | - |
| pH | 5.0-8.0 (1% solution) | pH meter | - |
Agricultural Magnesium Sulfate Monohydrate - Product Introduction Video
- Premium agricultural Magnesium Sulfate Monohydrate white powder
- Solubility, particle size and OEM packaging presentation
COA, TDS, MSDS & HM Test Reports
Certificate of Analysis (COA)
Certificate of Analysis: Magnesium Sulfate Monohydrate
Technical Data Sheet (TDS)
TDS: Magnesium Sulfate Monohydrate
Safety Data Sheet (MSDS)
MSDS: Magnesium Sulfate Monohydrate
Heavy Metal Test Report
Heavy Metal Test Report: Magnesium Sulfate Monohydrate
Download Support
Need custom documents or specific test results?
Frequently Asked Questions
1
What is Magnesium Sulfate Monohydrate used for in agriculture?
It supplies magnesium and sulfur for water-soluble fertilizers, compound fertilizers, granulated fertilizers, foliar products, fertigation products and liquid fertilizer manufacturing.
2
How is monohydrate different from magnesium sulfate heptahydrate?
Monohydrate contains less crystal water and has higher Mg/S nutrient density, making it suitable for high-analysis formulas, granulation and freight-efficient supply. Heptahydrate is commonly selected for routine fast water-soluble use.
3
Which crops often need magnesium?
Citrus, grapes, tomato, cucumber, pepper, potato, tea, coffee, oil crops and flowers often need Mg, especially in sandy soils, high-potassium programs or acidic leached soils.
4
Can it be used for foliar feeding?
Yes where local labels allow it. Use low concentrations, spray in the morning or evening, avoid heat and intense light, and test compatibility and crop safety first.
5
Do the packaging-image specifications apply?
No. Packaging images show Ihumate bag formats and OEM/ODM capability only. Final guaranteed analysis, net weight and regulatory text follow the contract, batch COA, SDS and destination-market requirements.
6
Are you a trading company or a manufacturer?
We are a professional manufacturing enterprise. Our modern factory is located in Huozhou, Linfen, Shanxi, China. With an annual capacity of 500,000 tons, we invite global partners to visit our facility.
7
How do you perform quality control?
8
Do you provide samples?
9
What are the payment terms?
10
How can I track my shipment after payment?
11
What is the Minimum Order Quantity (MOQ)?
12
Can you customize packaging or print our logo?
13
How long is the delivery time?
More questions about our products?
Application & Dosage: Magnesium Sulfate Monohydrate
For WSF, compound fertilizers, granulated fertilizers, foliar products, fertigation products, liquid fertilizers and Mg/S premixes. Count MgO, Mg and S in formulation calculations and adjust from soil, irrigation-water, tissue analysis and registration requirements.
Fertilizer Manufacturing
- High-Analysis Mg/S Module:Calculate inclusion from MgO > 27%, Mg > 16% and S > 21% for NPK, WSF, compound, granulated and liquid fertilizers.
- Compatibility Control:Validate water quality, pH, phosphates, carbonates, calcium salts and storage stability; use A/B tanks for concentrated stocks where needed.
Agricultural Application
- Root-Zone Mg/S Supply:Split applications during vegetative growth, fruit sizing, coloring and quality formation according to EC, pH, drainage and tissue analysis.
- Fast Foliar Correction:Spray low concentrations at early Mg deficiency; avoid heat and intense light, and jar-test mixes with pesticides or micronutrients.
Application Ratio Scheme
| Crop Name | Growth Stage | Application Ratio |
|---|---|---|
| Fertilizer formulation | WSF, compound, granulated or liquid fertilizer | Calculate from MgO > 27%, Mg > 16% and target guaranteed analysis |
| Fertigation/Sprinklers | Growth, fruit sizing or Mg deficiency correction | 5-15 kg/ha per application; adjust by analysis |
| Foliar spray | Early Mg deficiency or quality improvement | 0.3%-1.0%; test crop safety first |
| Soil or granulated fertilizer | Base dressing or top dressing formula | Follow soil testing, crop Mg demand and local label directions |
Product Advantages: Magnesium Sulfate Monohydrate
Ihumate Magnesium Sulfate Monohydrate delivers high Mg/S nutrient density, clean solubility and stable batch management for professional fertilizer manufacturers.
1
High-Density Mg/S Source
MgSO4·H2O > 98%, MgO > 27%, Mg > 16% and S > 21% support high-analysis fertilizer formulas.
2
Saves Formula Space and Freight
Compared with heptahydrate, monohydrate provides more active Mg/S per unit weight for export, compound fertilizer and granulation systems.
3
Supports Crop Quality and Stress Tolerance
Magnesium supports chlorophyll, sugar transport and dry matter; sulfur supports proteins, flavor, oils and stress-related metabolism.
4
Ihumate Export and OEM Support
Batch COA, SDS, export documents, reliable supply, formulation advice and 1-25 kg OEM/ODM packaging are available.
Certifications: Magnesium Sulfate Monohydrate
Ihumate is backed by globally recognized certifications.
- 🏅 OMRI Listed – Approved for organic use (USDA/NOP standards)
- 🏅 CERES Certified – High-standard organic inputs for sustainable agriculture
- ✔ Excellent international production process with full batch traceability
- ✔ Meeting the strict demands of global distributors and formulators
Ihumate Global Exhibition Videos
We showcase our Humic Acid, Seaweed, Liquid Fertilizer, and Bio-control series globally.
Join us at our 2026 exhibitions:
Event: Shanghai CAC (Fshow)
Booth: 12G05
Date: March 17-19, 2026
Address: No. 333 Songze Avenue, Qingpu District, Shanghai
Join us at our 2026 exhibitions:
Event: Shanghai CAC (Fshow)
Booth: 12G05
Date: March 17-19, 2026
Address: No. 333 Songze Avenue, Qingpu District, Shanghai
No. 64 Nangou, Chencun, Bailong Town, Huozhou City, Linfen City, Shanxi Province
© 2017 Shanxi Ihumate Biotech Co.,Ltd. All Rights Reserved | Privacy Policy | Powered by Ihumate