Magnesium Carbonate

Magnesium Carbonate (Light)
Magnesium Carbonate (Light) Magnesium carbonate (light) 100g Magnesium carbonate (light) 500g Magnesium carbonate (light) 1kg Magnesium Carbonate (Standard) 100g Magnesium Carbonate (Standard) 500g Magnesium Carbonate (Standard) 1kg Magnesium Carbonate Standard Magnesium Carbonate (Light) 6kg

Magnesium Carbonate is more complicated than it first seems. There are hydrated carbonates, basic carbonate and hydrated basic carbonates, which are all commonly known as ‘Magnesium Carbonate’. Inoxia currently stocks two grades, which are light hydrated basic magnesium carbonate and standard. The light form is 2–2.5 times more bulky than the standard.

Buy Magnesium Carbonate


Weight Cost Quantity
100g £2.67
500g £7.48
1kg £13.39
6kg £49.15
25kg £159.78


Weight Cost Quantity
100g £3.64
500g £10.51
1kg £19.62
6kg £76.84
20kg £200.88
100kg £846.04

Light Magnesium Carbonate

The light, or low density form has the formula 4MgCO3·Mg(OH)2·4H2O and is also known by the mineral name Hydromagnesite. The low density is owing to the porous crystal structure.
It is the best version to use as climbing, gym or weightlifting chalk.

Standard Magnesium Carbonate

This has the formula MgCO3 and the mineral name Magnesite.


Light Standard
Colour White Off-white
Grade Food Grade Technical Grade
Country of Origin France Spain

Application guide

Light Standard
Anticaking / Free flow Yes Yes
Gym Chalk Best OK
Climbing Chalk Best OK
Weightlifting Chalk Best OK
Refractory Bricks No Yes
Rubber filler Yes -
Plastic filler Yes -
Filler Yes Yes
Fireproofing & Heat preservation Yes Yes
Buffer Yes No
Drying agent Yes -
Pigment Yes Yes
Food additive E504 Yes* Yes*
Food additive E504 (i) No Yes*
Food additive E504 (ii) Yes* No
Antacid Yes* Yes*
Laxative Yes* -

* Our stock may not be suitable for human consumption, contact us if you require food / pharmaceutical grade.
- No data at this time.


Characterization of light and heavy magnesium carbonates using thermal analysis. Journal of Thermal Analysis and Calorimetry


Magnesium Carbonate MSDS

Product Identifiers

500g Light: 0029882790793, 100g Light: 0029882792100, 1kg Light: 0029882792117, 6kg Light: 0029882792124, 25kg Standard: 0029882794036, 100g Standard: 0029882794043, 500g Standard: 0029882794050, 1kg Standard: 0029882794067, 6kg Standard: 0029882794074, 20kg Light: 0029882794876, 100kg Light: 0029882797358,
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