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Home / All / Fertilizer & Agrochem / Sulphate / Magnesium Sulphate Monohydrate(Kieserite)color granular

Magnesium Sulphate Monohydrate(Kieserite)color granular

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Categories	Sulphate
Trademark/Brand	Richase Specialty Chemical Additives Supplier
Model	Magnesium Sulphate Monohydrate color granular
CAS No.	10034-99-8
Place of Origin	China (Mainland)
Grade Standard	Agriculture Grade, Industrial Grade, Medicine Grad
Appearance	Offwhite granular
Brand Name	RC
Raw Material	Magnesium oxide + sulphate acid
Export quantity	2 million tons of to international market
Model	Heptahydrate and Monohydrate
Purity	W.MgO 20% 23% 25%min
Magnesium contain	12-25
FOB port	China main port
Terms of Payment	L/C, D/A, D/P, Western Union
Update Time	Dec 26,2025

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Detail Information

What is Magnesium Sulphate Monohydrate?

Richase Enterprise is the manufacturer of magnesium sulphate Heptahydrate, Our Main market is Egypt, Bangladesh, Saudi Arabia, Ecuador, Honduras, Costa Rica, Guatemala, Chile, Peru, Mexico, Dominican, USA, Poland, Ukraine, Brazil, Italy and Lebanon, applicated in fertilizer grade, food grade, industry grade and also the feed grade, and the annual consumption is about 30,000ton/year.

Magnesium Sulphate Monohydrate(Kieserite)color granular
Magnesium Sulphate Monohydrate (MgSO₄·H₂O) is a concentrated, free-flowing white powder that serves as a highly efficient source of magnesium and sulfur. With a minimum magnesium (MgO) content of 18% and sulfur (S) content of 14%, it offers nearly double the nutrient density of its heptahydrate counterpart. The low moisture content and fine powder form make it the preferred choice for dry blending in compound fertilizers and animal feed premixes, as well as for industrial applications requiring a high-purity, concentrated magnesium source.

Core Features & Competitive Advantages

High Concentration & Cost Efficiency

· Superior Nutrient Density: Provides a highly concentrated form of magnesium (≥18% MgO) and sulfur (≥14% S), delivering more active nutrients per kilogram, which translates to significant savings in logistics and storage costs.

· Low Moisture Content: Typically contains less than 1% free moisture, minimizing the risk of caking, bridging in silos, and degradation of blended products during storage.

Optimized for Industrial Processing

· Free-Flowing Powder: The fine, uniform particle size ensures excellent flowability and prevents segregation, allowing for precise, homogeneous mixing in automated feed and fertilizer production lines.

· High Compatibility: Does not introduce excess moisture into dry mixes, making it perfectly compatible with other hygroscopic raw materials in feed and fertilizer formulations.

Quality & Traceability from the Source

· Derived from High-Purity Magnesia: Utilizing our core advantage as a leading magnesium producer in China, we ensure the raw material traceability and consistent high quality.

· Strict Quality Control: Produced under stringent standards with controlled levels of heavy metals, ensuring safety for sensitive applications in feed and premium agriculture.

magnesium sulfate granules

Enhanced Storage & Handling Stability

· Superior Moisture Resistance: The monohydrate form is inherently less hygroscopic than the heptahydrate, offering much greater stability in humid climates and during maritime transport, protecting the integrity of blended products.

· Thermal Stability: Stable under normal storage conditions, it does not release water of crystallization, avoiding the clumping issues associated with the dehydration of heptahydrate forms.

Functional Efficacy in End Use

· For Plant Nutrition: The highly soluble Mg²⁺ and SO₄²⁻ ions are rapidly available to correct magnesium deficiency, crucial for chlorophyll synthesis, photosynthesis, and improving crop yield and quality (e.g., sugar content in fruits).

· For Animal Nutrition: As a vital feed additive, it prevents magnesium deficiency disorders (e.g., grass tetany), supports enzyme function, bone development, and overall metabolic health without adding unnecessary moisture to the feed.

Product Specifications

Grade	Magnesium Sulphate Heptahydrate			Magnesium Sulphate Monohydrate
	(Epsom Salt/MgSO4.7H2O)			(Kieserite/MgSO4.H2O)
	A	B	C	A	B	C
Specification	Purity			Total MgO
	99.5%min	99%min	98%min	27%min	26%min	25%min
	S			S
	12.5%min	12.5%min	12.5%min	20%min		16%min
	Mg			W.MgO
	9.6%min	9.5%min	9.5%min	25%min		20%min
	Cl			PH
	0.015% max	0.015% max	0.015% max	6-9	6-9	6-9
	Lead			Pb
	0.0005% max	0.01% max	0.01% max	5ppm
	As			As
	0.0005% max	0.005% max	0.005% max	2ppm
Appearance	0.1-1mm / 1-3mm / 2-4mm / 4-6mm	0.1-1mm	0.1-1mm / 2-4mm Extrusion granular	Powder and Granular

Applications & Solutions

Compound Fertilizer Production

Application: A key ingredient in dry-process NPK/Mg/S compound fertilizer formulations. Dosage varies from 2-10% depending on the crop-specific formula.

Benefit: Provides a consistent, dust-free, and highly concentrated source of magnesium and sulfur that integrates perfectly into granular fertilizers, improving nutrient balance and crop quality.
Animal Feed Premix & Concentrates

Application: Precisely blended into mineral premixes, vitamin-mineral concentrates, and complete feeds for poultry, swine, ruminants, and aquaculture.

Benefit: Ensures accurate and uniform distribution of essential magnesium in feed, supporting animal health and productivity without affecting the shelf life or flowability of the premix.

Technical & Industrial Uses

Application: Used in chemical synthesis, as a drying agent, in the production of specialty chemicals, and in wastewater treatment where a concentrated magnesium source is required.

Benefit: Offers high chemical purity and reactivity, making it a reliable raw material for demanding industrial processes.

Packing&Delivery

Factory & Workshop

CERTIFICATE

Our Advantages

1.More than 10 years'experience in Magnesium products filed.

2.Working with shipping company directly can get lower sea freight.

3.Grasp industry information timely.

4.Faster working efficiency, better service,and ensure after-sale service.

5.The geographical position is superior,near the mine and the port.

6.Superior raw material.

7.Qualitycertificate:lSO,SGS,CIQ,Intertek,CCIC.

8.With rich and professional export experience incontainer and bulk cargo ship.

9.Annual capacity 500,000mts.

10.Provide professional Pre-sale consultingincludingproduct, packaging, transportation,certification andtesting etc.

11.Test the quality, weight and packaging of theproduct before shipment.

12.Prompt reply within 12 hours.

13.Bag customization service.

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FAQ

Q1: What is the key advantage of Monohydrate over Heptahydrate for my feed or fertilizer factory?

A: The primary advantages are higher nutrient concentration (saving on storage and freight), low moisture content (prevents caking and preserves blend stability), and superior flowability (ensures precise dosing and mixing in automated systems). It is the professional choice for dry blending processes.

Q2: Can Magnesium Sulphate Monohydrate be used for foliar spray applications?

A: While highly soluble, the Monohydrate powder is primarily engineered for dry blending. For foliar sprays, the Heptahydrate (Epsom Salt) form is often preferred due to its faster dissolution in small volumes of water. However, Monohydrate can be used if fully dissolved in a stock solution first.

Q3: How does your Magnesium Sulphate Monohydrate ensure consistency for large-scale feed production?

A: Our product is characterized by consistent particle size and exceptional flowability. This prevents segregation in silos and ensures that the same precise amount of magnesium is delivered into every ton of feed, which is critical for animal health and meeting nutritional specifications.