Nestled in Dashingqiao Town, Yingkou — known as the Magnesium Capital of China — our company was born from the rich mineral heritage of Liaoning Province. With abundant natural magnesium ore reserves beneath our feet and a legacy of industrial craftsmanship, we set out with one mission:

Nestled in Dashingqiao Town, Yingkou — known as the Magnesium Capital of China — our company was born from the rich mineral heritage of Liaoning Province. With abundant natural magnesium ore reserves beneath our feet and a legacy of industrial craftsmanship, we set out with one mission:
To bring high-quality, sustainable magnesium sulfate fertilizers from China to farms around the world.
From the very beginning, we’ve been more than just a manufacturer. We are soil nutrition partners to global growers, fertilizer brands, and agricultural innovators.
We believe in long-term partnerships, transparent business, and growing together — one harvest at a time.
Whether you’re blending premium NPK formulas or cultivating thousands of hectares of farmland, we deliver:
Rooted in China. Growing with the world. That’s our story — and we invite you to be part of it.
Magnesium (Mg) and Sulfur (S) are essential secondary nutrients for plant growth, yet often overlooked in conventional fertilization. Magnesium sulfate (MgSO₄) offers an efficient and highly soluble solution for addressing these deficiencies across a wide range of crops and regions.
| Method | Dosage |
|---|---|
| Soil Application | 50–150 kg/ha based on soil test |
| Foliar Spray | 1–3% concentration every 10–14 days |
| Fertigation | 10–30 kg/ha via drip / sprinkler system |
| Blending | As Mg source in NPK formulations |
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
KieseriteRongqing Chemical Focus on Kieserite, Chinese Kieserite Magnesium Sulfate producing and exporting. 2025 All Right Reserved by Rongqing Chemical