KIESERITE

Kieserite is a naturally occurring mineral form of magnesium sulfate monohydrate and Kieserite is widely used as a magnesium and sulfur source in agriculture and as a specialty mineral in industrial applications.
Kieserite provides readily available magnesium and sulfate, and Kieserite is valued for relatively low chloride content, good handling as a granular mineral, and suitability for soils and crops that require magnesium supplementation.
Kieserite is also used in fertilizer blends and compound fertilizers, and Kieserite performance depends on particle size, purity, and dissolution behavior under soil moisture conditions.

CAS Number: 14168-73-1 (magnesium sulfate monohydrate)
EC Number: 231-298-2 (magnesium sulfate)
Molecular Formula: MgSO4·H2O
Molecular Weight: 138.38 g/mol

Synonyms: Kieserite, Magnesium Sulfate Monohydrate, MgSO4·H2O, Natural Kieserite, Granular Kieserite, Fertilizer Kieserite, Magnesium Sulphate Monohydrate (variant spelling), Magnesium Sulfate 1-hydrate, Magnesium Sulfate Monohydrate Mineral, Agricultural Magnesium Sulfate, MgSO4 Monohydrate, Kieserite Fertilizer Grade, Kieserite, KIESERITE, Kieserite mineral, Kieserite (mineral), Magnesium Sulfate Monohydrate, Magnesium sulphate monohydrate, Magnesium sulfate monohydrate, MgSO4·H2O, MgSO₄·H₂O, MgSO4·H2O (format variant), Magnesium Sulfate 1-Hydrate, Magnesium Sulfate Monohydrate (Kieserite), Magnesium Sulfate Hydrate (monohydrate), Hydrated Magnesium Sulfate (monohydrate), Magnesium Sulfate (monohydrate), Magnesium Sulphate (monohydrate), Monohydrate Magnesium Sulfate, Monohydrate Magnesium Sulphate, Natural Magnesium Sulfate Monohydrate, Mineral Magnesium Sulfate Monohydrate, Kieserite Fertilizer, Kieserite Fertiliser (spelling variant), Fertilizer Grade Kieserite, Agricultural Kieserite, Agricultural Magnesium Sulfate Monohydrate, Magnesium Sulfate Monohydrate Fertilizer, Magnesium Sulfate Monohydrate Fertiliser, Mg Sulfate Monohydrate Fertilizer, Mg Sulphate Monohydrate Fertiliser, Magnesium Sulfate Monohydrate Granules, Kieserite Granules, Kieserite Granular, Kieserite Powder, Kieserite Fine Powder, Kieserite Crystals, Kieserite Prills, Kieserite (MgSO4·H2O), Magnesium Sulfate Monohydrate (MgSO4·H2O), Magnesium Sulfate Monohydrate (CAS 14168-73-1) (common listing), CAS 14168-73-1, Kieserite (CAS 14168-73-1), Magnesium sulfate monohydrate (EINECS/EC listing variant), Magnesium Sulfate Monohydrate Technical Grade, Magnesium Sulfate Monohydrate Industrial Grade, Magnesium Sulfate Monohydrate Fertilizer Grade, Magnesium Sulfate Monohydrate Feed Grade (where applicable), Magnesium Sulfate Monohydrate Food Grade (where applicable), Magnesium Sulfate Monohydrate Reagent Grade (where applicable), Magnesium Sulfate Monohydrate High Purity (grade context), Magnesium Sulfate Monohydrate Natural Mineral, Kieserite Ore, Kieserite Salt

APPLICATIONS

Kieserite is used as a magnesium fertilizer to correct magnesium deficiency in crops such as potatoes, sugar beet, cereals, and vegetables.
Kieserite is incorporated into fertilization programs to improve chlorophyll formation and support photosynthesis through magnesium nutrition.
Kieserite is used in high-yield crops to support balanced nutrition and reduce magnesium-related quality defects.

Kieserite is used as a sulfur fertilizer to supply sulfate sulfur needed for protein synthesis and crop growth.
Kieserite is incorporated into sulfur-deficient soil management to improve yield and plant vigor.
Kieserite is used in oilseed crops to support sulfur demand and improve seed quality.

Kieserite is used in compound fertilizer production as a mineral nutrient source for magnesium and sulfur.
Kieserite is incorporated into NPK blends to add Mg and S without adding chloride.
Kieserite is used in bulk blending operations to improve nutrient completeness in granular fertilizer products.

Kieserite is used in horticulture and greenhouse production to provide magnesium and sulfur in controlled fertilization programs.
Kieserite is incorporated into fertigation systems when soluble or fine grades are used and filtration is managed.
Kieserite is used in fruit and vegetable production to reduce magnesium deficiency symptoms such as interveinal chlorosis.

Kieserite is used in turf and lawn fertilization to improve green color and plant health on magnesium-poor soils.
Kieserite is incorporated into sports turf programs to support stress tolerance and consistent turf quality.
Kieserite is used in ornamental plant nutrition to reduce leaf yellowing linked to magnesium deficiency.

Kieserite is used in forestry and reclamation projects to supply magnesium and sulfur for long-term soil improvement.
Kieserite is incorporated into reforestation fertilization plans to support tree growth on nutrient-poor sites.
Kieserite is used in land restoration to improve nutrient balance in degraded soils.

Kieserite is used in animal nutrition and feed premixes in some systems as a magnesium source when specifications allow.
Kieserite is incorporated into mineral supplements where controlled magnesium delivery supports diet formulation.
Kieserite is used in livestock operations only with feed-grade specification control and appropriate regulatory compliance.

Kieserite is used in industrial applications as a magnesium sulfate raw material where monohydrate form and mineral origin are acceptable.
Kieserite is incorporated into magnesium sulfate processing routes where controlled hydration state is relevant.
Kieserite is used in specialty mineral blends where low chloride and natural mineral sourcing are desired.

Kieserite is used in laboratory and educational settings as a mineral reference for magnesium sulfate monohydrate.
Kieserite is incorporated into mineral collections and teaching demonstrations related to sulfate minerals.
Kieserite is valued because Kieserite provides a practical, chloride-free magnesium and sulfur source with good handling properties for agriculture and fertilizer blending.

Kieserite is used as a magnesium and sulfur fertilizer in agriculture.
Kieserite supplies plant-available magnesium to support chlorophyll formation.
Kieserite provides sulfate sulfur that supports protein synthesis and plant growth.

Kieserite is used in field crop fertilization to correct magnesium deficiency in soils.
Kieserite helps prevent interveinal chlorosis caused by low magnesium availability.
Kieserite supports higher yield and crop quality when magnesium is a limiting nutrient.

Kieserite is used in horticulture for fruits and vegetables that have high magnesium demand.
Kieserite supports improved fruit development and quality parameters in magnesium-sensitive crops.
Kieserite helps maintain balanced nutrition in intensive cultivation systems.

Kieserite is used in citrus production to support leaf greenness and photosynthetic performance.
Kieserite helps reduce magnesium deficiency symptoms on older leaves.
Kieserite supports improved fruit size and consistency when nutrition is balanced.

Kieserite is used in grape and vineyard management to support magnesium status in vines.
Kieserite helps maintain healthy foliage and stable sugar accumulation through the season.
Kieserite supports quality outcomes in wine grape production when magnesium is optimized.

Kieserite is used in potato cultivation to support tuber yield and quality.
Kieserite helps improve photosynthesis and carbohydrate transport by supplying magnesium.
Kieserite supports better tuber size distribution in magnesium-deficient soils.

Kieserite is used in sugar beet and sugar cane fertilization programs to support magnesium and sulfur nutrition.
Kieserite supports efficient sugar formation and transport within the plant.
Kieserite helps maintain leaf function during high biomass growth.

Kieserite is used in oilseed crops such as canola and sunflower to supply sulfur and magnesium.
Kieserite supports oil formation and protein metabolism through sulfate supply.
Kieserite helps improve seed yield and quality in sulfur-deficient soils.

Kieserite is used in cereal crops to support magnesium nutrition, especially on sandy or acidic soils.
Kieserite helps improve grain filling by supporting photosynthetic efficiency.
Kieserite supports overall crop vigor when magnesium is limiting.

Kieserite is used in pasture management to improve forage magnesium content for livestock.
Kieserite supports reducing risk of grass tetany by improving magnesium availability in forage.
Kieserite helps improve pasture quality and animal health outcomes in magnesium-poor soils.

Kieserite is used in turf management for sports fields and lawns to maintain green color and stress tolerance.
Kieserite supports chlorophyll formation and helps turf recover after mowing and wear.
Kieserite helps improve turf color without excess nitrogen input.

Kieserite is used in ornamental plant nutrition programs to correct magnesium deficiency in landscape plants.
Kieserite supports greener leaves and improved aesthetic quality in ornamentals.
Kieserite helps prevent yellowing associated with magnesium shortage in container and garden plants.

Kieserite is used in greenhouse cultivation as a magnesium source in fertilization strategies.
Kieserite supports soluble magnesium supply when used in compatible fertigation programs.
Kieserite helps maintain balanced nutrient solutions in controlled environments.

Kieserite is used in fertigation systems as part of magnesium and sulfur supplementation.
Kieserite supports nutrient solution balancing when sulfate compatibility is desired.
Kieserite helps reduce reliance on chloride-containing magnesium sources in sensitive crops.

Kieserite is used in organic and low-chloride fertilization programs when permitted by standards.
Kieserite supports sulfur supply without adding nitrate or chloride forms.
Kieserite helps improve nutrient management in chloride-sensitive crops.

Kieserite is used in blended NPK fertilizers as a magnesium and sulfur component.
Kieserite supports production of compound fertilizers with added secondary nutrients.
Kieserite helps improve fertilizer value by adding magnesium and sulfate sulfur.

Kieserite is used in fertilizer granulation to provide uniform secondary nutrient distribution.
Kieserite supports physical blending with other granules for consistent field spreading.
Kieserite helps improve fertilizer handling by providing stable granule form.

Kieserite is used in foliar nutrition concepts as a magnesium source when converted into suitable solution forms.
Kieserite supports corrective magnesium nutrition during critical growth stages.
Kieserite helps address deficiency symptoms quickly in targeted crop management.

Kieserite is used in soil amendment programs to improve magnesium saturation on exchange sites.
Kieserite supports balanced Ca:Mg ratios in soils where magnesium is depleted.
Kieserite helps improve soil fertility management without raising pH as strongly as dolomitic lime.

Kieserite is used in acid soils where magnesium is leached and deficiency is common.
Kieserite supports magnesium replenishment in high-rainfall or sandy soil regions.
Kieserite helps maintain crop performance under nutrient leaching conditions.

Kieserite is used in precision agriculture to correct site-specific magnesium and sulfur deficiencies.
Kieserite supports variable-rate application based on soil testing maps.
Kieserite helps optimize fertilizer cost by targeting deficient zones only.

Kieserite is used in rehabilitation of degraded soils to restore magnesium and sulfur levels.
Kieserite supports rebuilding nutrient reserves in low-fertility soils.
Kieserite helps improve plant establishment in reclamation projects.

Kieserite is used in composting and soil conditioning to add magnesium and sulfur to compost products.
Kieserite supports improved nutrient profile of compost blends.
Kieserite helps reduce ammonia loss by supporting balanced nutrient chemistry in some compost systems.

Kieserite is used in animal bedding and manure management research to influence nutrient balance in outputs.
Kieserite supports improved magnesium content in manure for return-to-field fertility.
Kieserite helps evaluate sulfur cycling in integrated livestock-crop systems.

Kieserite is used in fertilizer trials to compare magnesium sources such as kieserite versus magnesium sulfate heptahydrate.
Kieserite supports evaluation of release rate and handling differences.
Kieserite helps optimize magnesium strategy for specific crop and soil conditions.

Kieserite is used in production of magnesium sulfate products as a naturally occurring feedstock in some processing routes.
Kieserite supports industrial conversion to other magnesium sulfate hydrates when required.
Kieserite helps provide a mineral-source magnesium sulfate supply chain.

Kieserite is used in mining and mineral processing contexts as a magnesium sulfate mineral of interest.
Kieserite supports ore characterization and beneficiation studies.
Kieserite helps inform processing strategies where magnesium sulfate minerals occur in deposits.

Kieserite is used in cement and construction material research as a sulfate source in specialty systems.
Kieserite supports controlled sulfate addition in lab-scale experiments.
Kieserite helps evaluate sulfate effects on setting and expansion behavior in certain binders.

Kieserite is used in laboratory teaching to demonstrate sulfate minerals and hydration behavior.
Kieserite supports mineralogy labs studying evaporite minerals.
Kieserite helps illustrate magnesium sulfate chemistry in geoscience education.

Kieserite is used in soil science research to study magnesium availability and sulfate leaching.
Kieserite supports controlled experiments on nutrient mobility in different soil textures.
Kieserite helps evaluate interactions with calcium, potassium, and ammonium in nutrient uptake.

DESCRIPTION

Kieserite is a magnesium sulfate mineral with one molecule of water per formula unit, and Kieserite is typically found in evaporite deposits.
Kieserite is commonly supplied as granules or powder depending on the intended application, and Kieserite fertilizer grades focus on flowability, particle size, and nutrient content.
Kieserite dissolves in soil water to release magnesium and sulfate ions, and the dissolution rate depends on particle size and soil moisture availability.

Kieserite is often selected where chloride should be minimized, and Kieserite can be preferred over some other magnesium fertilizers for chloride-sensitive crops.
Kieserite can be blended with other fertilizer components, and Kieserite compatibility depends on moisture control to avoid caking in stored blends.
Kieserite quality depends on purity, insoluble content, heavy metal limits, and granule strength for handling and spreading.

Kieserite should be stored in a dry place to prevent caking and maintain free-flowing behavior.
Kieserite dust can be generated during handling, so dust control and appropriate PPE are recommended.
Kieserite should be used according to agricultural recommendations, soil testing results, and local regulations for fertilizer products.

Kieserite provides magnesium and sulfate sulfur, both of which are essential plant nutrients.
Kieserite supplies magnesium needed for chlorophyll and enzyme activation in plants.
Kieserite supplies sulfur as sulfate, supporting amino acid and protein synthesis.

Kieserite is less hydrated than Epsom salt, which can improve storage and handling due to lower water content.
Kieserite is typically less prone to caking than highly hydrated magnesium sulfate forms in some conditions.
Kieserite solubility is sufficient for agricultural use, though dissolution rate depends on particle size and soil moisture.

Kieserite does not significantly raise soil pH compared with dolomitic lime because it is a neutral salt.
Kieserite is often used when magnesium is needed without adding carbonate alkalinity.
Kieserite is compatible with many fertilizer blends, but blending behavior depends on granule size and moisture.

PROPERTIES

Chemical Formula: MgSO4·H2O
Molecular Weight: 138.38 g/mol
Common Name: Kieserite
Chemical Type: Magnesium sulfate monohydrate mineral
Appearance: White to grayish crystalline granules or powder (natural mineral; color varies)
Odor: Odorless
Solubility: Soluble in water; dissolution rate depends on particle size and temperature
Nutrient Content: Provides magnesium (Mg) and sulfur (as sulfate) (grade dependent)
Chloride Content: Typically low compared with some alternative magnesium sources (grade dependent)
Hygroscopicity: Can absorb moisture; caking possible in humid storage conditions
Stability: Stable under dry storage; avoid prolonged exposure to moisture
Storage Temperature: Ambient, dry, protected from humidity
Shelf Life: Long shelf life under dry storage; typically 24–60 months depending on packaging (supplier dependent)

FIRST AID

Inhalation:
Move to fresh air if dust is inhaled.
Seek medical attention if respiratory irritation persists.
Avoid breathing dust during handling and bulk transfer.

Skin Contact:
Wash with soap and water after contact.
Remove contaminated clothing and wash before reuse.
Seek medical advice if irritation develops or persists.

Eye Contact:
Rinse cautiously with water for several minutes.
Remove contact lenses if present and easy to do, then continue rinsing.
Seek medical attention if irritation persists.

Ingestion:
Rinse mouth with water.
Seek medical attention if discomfort occurs or if a significant amount is swallowed.
Never give anything by mouth to an unconscious person.

Note to Physicians:
Treat symptomatically.
No specific antidote is required.
Provide supportive care based on exposure route and symptoms.

HANDLING AND STORAGE

Handling:
Use appropriate PPE including gloves and safety glasses, and use dust protection as needed.
Avoid generating dust and avoid inhalation of fine particles.
Wash hands after handling and before eating, drinking, or smoking.

Ventilation:
Use local exhaust or general ventilation where dust may be generated.
Maintain good airflow during weighing, charging, and blending operations.
Minimize airborne particulate accumulation in enclosed areas.

Storage:
Store in tightly closed bags or containers in a cool, dry place.
Protect from moisture to prevent caking and maintain flowability.
Keep materials properly labeled and protected from contamination.

Spill and Leak Procedures:
Sweep up spilled material and avoid dust generation.
Collect into suitable containers for reuse or disposal according to local regulations.
Clean the area to remove residues and reduce slip risk on smooth floors.

Handling Precautions:
Use appropriate fertilizer spreading and blending equipment to minimize dust and maintain consistent dosing.
Verify nutrient specifications and impurity limits for the intended agricultural or industrial application.
Rotate stock using FIFO practices to maintain consistent granule integrity and handling behavior.