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Magnesium Carbonate Basic Heavy

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Available sizes
SizePrice ex VATPrice inc VAT
100g £9.99 £11.99
250g £10.82 £12.99
500g £13.32 £15.99
1Kg £18.32 £21.99
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Magnesium Carbonate Basic Heavy

Technical grade

Synonyms: Carbonic acid magnesium salt (1:1) mixture with Magnesium hydroxide (Mg(OH)2), Magnesium carbonate, Pentamagnesium tetracarbonate dihydroxide pentahydrate, Magnesium carbonate hydroxide, carbonate de magnesium basique


  • CAS No: 39409-82-0
  • EINECS: 235-192-7
  • Molecular Weight: 485.65
  • Chemical formula: 4MgCO3.Mg(OH)2.5H2O
  • Appearance: white powder
  • Odour: Odourless
  • Solubility: Insoluble in cold water, hot water. Soluble in dilute acids with effervescence. Insoluble in alcohol.
  • S.G. 2.16 g/mL
  • Melting Point: 600 °C
  • Refractive index: 1.52-1.53
  • MgO content: 40-43%

General uses for Magnesium carbonate basic

Rubber & plastics industry:

  • Reinforcing filler
  • To give the highest transparency to natural rubber
  • Antiblocking agent, Stabilizer in the automotive PVC plastisols
  • To preserve a colored parts in rubber products
  • Fireproofing and heat insulating in manufacture of plastics
  • Forming adjuster for foamed EVA

Paper, ink & paint industry:

  • Fillers and anti-misting in manufacture of paint and ink
  • Material for pigments
  • Oil absorbent in manufacture of paper

Ceramics, glass & construction industry:

  • Matting agent in the manufacture of ceramics
  • Molten material for glass,
  • Adjuster for permittivity in manufacture of ceramic capacitor
  • Suspending agent in mixing cement, denitrificator in manufacturing of special stainless steel.

Health & Safety

Not a dangerous substance according to GHS. This substance is not classified as dangerous according to Directive 67/548/EEC.


PLEASE NOTE: This product is not for human or animal consumption. 


Click here for MSDS

Click here for Sales Specification sheet