Fully Water-Soluble Magnesium Sulfate Heptahydrate (MgSO₄·7H₂O) is a premium-grade, crystalline fertilizer and industrial raw material designed for maximum efficiency and absorption.
Magnesium Sulfate Heptahydrate ,a kind of Magnesium Sulfate produced by Rongqing Chemical, commonly known as Epsom salt, is a highly pure and versatile inorganic compound. It appears as white or colorless crystalline solids, prized for their excellent solubility in water.
This essential compound serves as a critical source of two vital elements: Magnesium and Sulfur. Magnesium is the central atom of the chlorophyll molecule, crucial for photosynthesis and enzyme activation in plants. Sulfur is a key component for synthesizing proteins, vitamins, and amino acids.
Furthermore,Our magnesium sulfate varies in grades, which is widely used in industry, agriculture, high-grade mineral element water-soluble fertilizers, micronutrient feed additives, fireproofing materials, water treatment, textile industry, aquaculture, soil remediation, and mineral processing.
| Magnesium Sulfate Heptahydrate | Standard | Test Result |
|---|---|---|
| Purity | 98%min | 99%min |
| MgO% | 16%min | 16.2%min |
| Mg% | 9.8%min | 9.83%min |
| As ppm | 2ppm max | 1.8ppm max |
| PH | 5.0~9.2 | 5.0~9.2 |

1. Excellent Physical Properties
🔹High Solubility: Fully water-soluble with no residue left in the solution. Ideal for drip irrigation, sprinkler irrigation, fertigation systems, and foliar applications.
🔹High Purity: Extremely low impurity levels, with strict control over heavy metals and other harmful substances, ensuring superior safety.
🔹Appearance: White, colorless transparent crystals or granules with excellent flowability; easy to weigh, dissolve, and apply.
2. Highly Efficient Nutrient Function
Supplies both essential secondary nutrients—magnesium and sulfur. Fast-acting and readily absorbed by roots or leaves, effectively correcting nutrient deficiencies in a short time.
3. Wide Application Compatibility
🔹Compatible with most pesticides and fertilizers.
🔹Suitable for multiple application methods: base dressing, topdressing, drip irrigation, sprinkler irrigation, and foliar spray.
🔹Nearly neutral pH: The aqueous solution is slightly acidic to neutral, safe for both soil and crops, and does not alter soil pH.
4.Outstanding Fertilizer Performance
As a fully water-soluble fertilizer, it enables precise nutrient delivery, reduces nutrient loss, improves crop quality, and lowers overall fertilizer usage.
• Over 20 years of expertise in magnesium sulfate manufacturing and kieserite fertilizers certified with ISO 9001, FAMI-QS, and REACH registration, with extensive global service experience.
• Our magnesium sulfate Heptahydrate factory with 20000T yearly output, is located in China’s “Magnesium Capital” ,where our magnesium ore resources are abundant and diverse and has Close proximity to export ports and a well-developed industrial supply chain.
• Equipped with an independent R&D team, we provide one-stop customized fertilizers and personalized solutions based on customer requirements.
Here’s the Brief Rongqing Chemical‘s video Introduction:
🔹Our Kieserite & Magnesium Sulfate products feature high purity, stable supply, international standards, and professional service. Exported to 40+ countries worldwide, we are trusted by leading fertilizer brands and large-scale farms.
💡 Contact us today to get the latest quotation and free samples. Let us support your fertilizer formulation and agricultural growth!
📩 Email: marketing@rqsulfates.com (Thunder)
📞 Tel: +86-151-1140-0823
💬 WhatsApp/WeChat: +86-151-1140-0823
Rongqing Chemical Co. Ltd, established in 1991, is a China-based kieserite Manufacturer & Exporter. Located in Yingkou Liaoning -the China magnesium We focus on kieserite,magnesium sulfate
E-mail :
marketing@rqsulfates.com info@rqsulfates.comWhatsapp:
86-15111400823Office Tel:
86-731-85864603 86-731-85864624
Moble Tel/Wechat:
86-18670090463 86-15111400823QQ:1265626382
Address:
Headquarters:Yuelu District,Changsha, Hunan, ChinaKieserite Factory:
Dashiqiao,Yingkou,Liaoning,ChinaWebsite
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