Comparison between Rongqing’S KIESERITE and ESTA® Kieserit GRAN

Those who frequently gain exposure to magnesium fertilisers, Kieserite, and magnesium sulphate,  will undoubtedly be familiar with K+S’s ESTA® Kieserit GRAN. Both are kieserite products, but what distinguishes Rongqing Chemical’s kieserite granular from K+S’s ESTA® Kieserit GRANular?

Let us briefly introduce the manufacturers of these two product categories:
Rongqing Chemical, one of China’s established sulphate producers, operates its magnesium sulphate and sulphate-magnesium fertiliser facilities in Yingkou, Liaoning, where known as China’s Magnesium Capital. Leveraging Yingkou’s magnesite resources, Rongqing runs five modern production lines with sulphation technology, achieving a daily output of 500 tonnes for Kieserite granules and an annual capacity of 20,000 tonnes for magnesium sulphate. Rongqing Chemical is certified with ISO9001, FAMI-AS, and REACH registrations, consistently supplying various trace element magnesium fertiliser raw materials to global branded fertiliser manufacturers, distributors, importers, high-end fertiliser R&D entities, and raw material procurement operations.
K+S, is a global salt producer and a leading potash fertiliser supplier. It maintains production bases in Europe and the Americas, with distribution centres in Africa and Asia. K+S pursues the policy of regional procurement and supplying mineral raw materials, products, and solutions to customers worldwide.

To summarise comprehensively, the similarities and differences between Rongqing Chemical’s Kieserite Granular and K+S’s ESTA® Kieserite Granular are as follows:

Similarities:

1. Both are mineral fertilisers, with magnesium and sulphur as their primary fertilising elements.
2. Post-application benefits for crops include: immediate supply of dual sulphur-magnesium elements, suitability for diverse soils with pH restoration properties, synergistic enhancement of NPK fertiliser utilisation, promotion of root growth, and improved crop absorption capacity.
3. Physical characteristics and application advantages: suitable for standalone application or blending with NPK fertilisers without reaction, making it an ideal co-blended fertiliser choice for farm fertilisation systems. The granular fertiliser exhibits excellent hardness and uniform particle size, making it suitable for modern mechanised fertilisation operations.
4. Suitable for crops with high magnesium/sulphur requirements or for poor soils, acidic soils, and saline soils. Crops requiring high magnesium include: oil palm, banana, tobacco, grape, cereals, rapeseed, potato, sugar beet, etc.

Differences:

1. The most evident and significant distinction lies in production methods. Rongqing Chemical’s Kieserite Granular is made from locally sourced high-quality magnesite, which is calcined to magnesium oxide. Then magnesium oxide reacts with sulphuric acid into magnesium sulfate powder. Kieserite is granulated from magnesium sulfate powder, which is wildely applied in crops. Conversely, K+S’s ESTA® Kieserit GRANular is manufactured from natural German ore deposits, meeting organic farming standards and suitable for use on organic farms.
2.Pricing differs. In present market, ESTA® Kieserit GRANular generally commands a higher price than kieserite granular. For fertilising non-organic crops or large-scale magnesium supplementation, the chemically processed kieserite offers a more economical alternative while delivering equivalent sulphur and magnesium supplementation. It serves as an ideal cost-effective substitute and alternative for ESTA® Kieserit GRANular.

Summary:
For value-for-money solutions, consider chemical kieserite fertilizers, such as those produced by China’s Rongqing Chemical, whose Granular kieserite can also be custom-produced according to client’s specifications.
If you’d like further info. about Rongqing’Kieserite—such as COA, MSDS, dosing calculators,package, or comparisons with other Mg–S fertilizers—just let me know!