Magnesium Sulphate Heptahydrate Supplier South Africa

Epsomite (Epsom salt) for agricultural fertiliser, pharmaceutical laxative, textile dyeing, fireproofing, and water-treatment applications.

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Quick Specs

CAS No.	10034-99-8
Formula	MgSO₄·7H₂O
Purity	≥99%
Appearance	White crystalline granules or powder
MgO Content	≥16%
Solubility in Water	710 g/L at 20 °C
UN No.	N/A (non-hazardous)

Magnesium Sulphate in Agriculture and Industry

Magnesium sulphate heptahydrate (Epsom salt) is an important source of both magnesium and sulphur in agricultural applications. Magnesium is a central atom in the chlorophyll molecule, and deficiency causes interveinal chlorosis; MgSO₄ can be applied both as a soil amendment and as a foliar spray for fast correction. In the textile industry it fixes reactive dyes on cotton and acts as a dyebath electrolyte. Pharmaceutical-grade Epsom salt is a well-established osmotic laxative used in bowel preparation and as a soaking remedy for muscle aches.

Grades and Packaging

Terracore stocks agricultural and food/pharmaceutical grades of magnesium sulphate heptahydrate. Agricultural grade is available in 25 kg bags and 1,000 kg bulk bags. Pharmaceutical grade (BP/USP) is supplied in sealed 25 kg HDPE-lined bags with full GMP batch documentation. COA reports MgO content, sulphate, and moisture. Product is non-regulated for transport.

Applications

Magnesium fertiliser (foliar and soil-applied)
Pharmaceutical laxative (Epsom salt)
Textile dyeing mordant and fixing agent
Fireproofing construction material additive
Animal feed magnesium supplement
pH buffer in laboratory media

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