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Product Detail

Kieserite

MgSO4·H2O monohydrate raw material, MgO up to 27% and S 21%, a concentrated magnesium-sulphur source in powder or 2-5 mm granular form. Values are industry-typical and confirmed per batch COA.

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What it is / When to use

Concentrated magnesium-sulphur raw material for soil and blending

Kieserite is magnesium sulphate monohydrate, MgSO4·H2O, CAS 14168-73-1, a secondary-nutrient fertilizer raw material supplying typically MgO 27%, Mg 16%, and S 21% in the 20-30 mesh powder. RunziChem exports it as a high-purity, free-flowing magnesium-sulphur source for soil programs and dry fertilizer blending.

  • What it is Kieserite, magnesium sulphate monohydrate (MgSO4·H2O), CAS 14168-73-1, off-white powder or 2-5 mm granular.
  • When to use Use it as a concentrated magnesium source for soil application (flush) and bulk-blend (BB) fertilizers, where its uniform size and good flowability suit blending; more concentrated than heptahydrate Epsom salt.
  • Honesty note specifications are industry-typical values for evaluation; final values are confirmed per batch COA.
MgO 27%Kieserite · S 21%

Specification

Typical specification for buyer evaluation

Formula, CAS, purity, appearance, content by grade, applications, packaging, and document availability are shown for procurement screening. Values are industry-typical; final values are confirmed per batch COA.

ProductKieserite (magnesium sulphate monohydrate)
Chemical nameMagnesium sulphate monohydrate (kieserite)
FormulaMgSO4·H2O
CAS14168-73-1
Grade/PurityFertilizer grade; high purity, uniform particle size, good flowability; industry-typical values — exact grade confirmed per inquiry
AppearanceOff-white powder (20-30 mesh) or 2-5 mm granular
Content — powder (20-30 mesh)MgO 27.0%; Mg 16.0%; S 21.0%; industry-typical values confirmed per batch COA
Content — granular (2-5 mm)MgO 25.0%; Mg 15.0%; S 20.0%; industry-typical values confirmed per batch COA
ApplicationsConcentrated magnesium-sulphur source for soil application (flush) and dry fertilizer blending; more concentrated than heptahydrate Epsom salt
Packaging25 kg / 50 kg export bags, jumbo bags (1,250 kg), and custom packaging on request
DocumentsTDS, current batch COA, and SDS available on request

Applications

Where Kieserite fits

Confirm crop, rate, compatibility, and local label requirements before application.

Magnesium + sulphur supply

Delivers MgO up to 27% magnesium together with S 21% sulphate sulphur in one concentrated raw material.

Soil (flush) application

A concentrated magnesium source for soil-applied programs correcting magnesium deficiency in field and plantation crops.

Bulk-blend (BB) source

Uniform particle size and good flowability suit bulk-blend and compound fertilizer production.

Powder or granular

20-30 mesh powder (MgO 27%) and 2-5 mm granular (MgO 25%) grades are matched to your blending or application route.

Compare with Epsom / EDTA-Mg

For fully soluble drip or foliar magnesium, compare heptahydrate Magnesium Sulphate; for chelated stability compare EDTA-Mg-6.

Batch documents

TDS, COA, and SDS support procurement and formulation review.

Packaging & Documents

Export packaging with batch-level documents

RunziChem supports standard export bags and procurement documents for review before order confirmation.

  • Packaging 25 kg / 50 kg export bags, jumbo bags (1,250 kg), and custom packaging on request.
  • Documents TDS, current batch COA, SDS, packing list, and shipment documents on request.
  • Quality system ISO 9001-certified quality management, with final product values confirmed by batch COA.

Procurement note

Send target grade, annual volume, destination port, packaging preference, and application route. The export team can reply with the current specification, document set, and quotation.

25 kg 50 kg Jumbo bags Custom pack TDS COA SDS

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Buyer FAQ

Kieserite questions

What is the difference between kieserite and magnesium sulphate heptahydrate (Epsom salt)?
Kieserite is magnesium sulphate monohydrate (MgSO4·H2O, CAS 14168-73-1) with only one water of crystallisation, so it is more concentrated: typically MgO 27% and S 21% in the 20-30 mesh powder. Heptahydrate Epsom salt (MgSO4·7H2O) carries about MgO 16% and dissolves faster. Choose kieserite when you need a concentrated soil-applied or blended magnesium source, and heptahydrate when full water solubility for fertigation or foliar use is required.
What grades and particle sizes of kieserite does RunziChem supply?
RunziChem offers kieserite as a 20-30 mesh powder with typical MgO 27.0%, Mg 16.0%, and S 21.0%, and as a 2-5 mm granular grade with typical MgO 25.0%, Mg 15.0%, and S 20.0%. Both are high-purity, uniform-sized, and free-flowing. These are industry-typical values; the exact grade, granulometry, and origin are confirmed per inquiry and per batch COA.
How is kieserite applied in the field?
Kieserite is used mainly for soil application (flush) and for dry fertilizer blending, where its uniform particle size and good flowability suit bulk-blend (BB) production. It supplies magnesium and sulphate sulphur together to correct magnesium deficiency in field, plantation, and horticultural crops. For fully soluble drip or foliar magnesium programs, compare heptahydrate magnesium sulphate or EDTA-Mg chelate.
Are the magnesium and sulphur values guaranteed?
No. The figures shown for kieserite, such as MgO 27% and S 21%, are industry-typical values for buyer screening. The current batch certificate of analysis (COA) confirms the final magnesium oxide content, sulphur content, moisture, particle size, and appearance for the lot you receive.

Request Kieserite documents and a quote.

Send annual volume, destination market, packaging, and application route. RunziChem can provide TDS, current batch COA, SDS, and a formal quotation.

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