Magnesium Sulphate FCC Grade — Epsom Salts

Our Magnesium Sulphate is supplied as FCC (Food Chemicals Codex) grade — chemically pure, the pharmaceutical and cosmetic standard. Better known as Epsom Salts, these high-purity heptahydrate crystals have been valued for centuries for their soothing, restorative properties.

The crystals dissolve quickly in warm water with practically no residue, making them ideal for bath soaks, foot baths, and bath salt formulation. Available in sizes from 100g sample packs through to 25kg sacks for trade and bulk users.

Common Uses

• Bath soaks — add 1-2 cups to a warm bath to soothe tired, aching muscles after exercise or a long day
• Foot baths — relaxing, refreshing soak for tired feet
• Bath salts & cosmetics — base ingredient for blending your own bath salts and scrubs with essential oils and fragrance
• Gardening — provides magnesium and sulfur to plants; widely used on tomatoes, roses and peppers to promote healthy growth and greener foliage
• Lawn care — helps revive yellowing grass and improves nutrient uptake

Product Specification

• Grade: FCC (Food Chemicals Codex), chemically pure
• Chemical name: Magnesium Sulphate Heptahydrate
• Molecular formula: MgSO₄·7H₂O
• Molecular weight: 246.48 g/mol
• CAS number: 10034-99-8
• E number: E518
• EC number: 231-298-2
• Assay: ≥ 99.5% on the ignited basis
• Magnesium Sulphate (MgSO₄): 49.2% typical
• Water content (H₂O): 50.7% typical
• Loss on ignition: 40.0 – 52.0%
• Lead: ≤ 4 mg/kg
• Selenium: ≤ 30 mg/kg
• Granulometry: <1 mm: 70% · d50: 0.75 mm
• Bulk density: ~980 kg/m³
• Appearance: White crystals
• Odour: Odourless
• Solubility: Readily soluble in water (26.3% at 20°C); slowly soluble in glycerine

Storage

Store in a cool, dry place in a sealed container. The product is prone to absorbing moisture or dehydrating depending on ambient temperature and humidity, which can cause caking — keep tightly sealed and break up any clumps before use.