MagChem® 40 is a high purity, light burned magnesium oxide produced from magnesium-rich brine and dolomitic lime. This fine white powder has a very high reactivity index and a low bulk density.

Chemical Name: Magnesium Oxide

Functions: Filler

CAS Number: 1309-48-4

Chemical Family: Magnesium & Magnesium Compounds

Synonyms: Magnesia, MgO

Technical Data Sheet

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Identification & Functionality

Chemical Name
Plastics & Elastomers Functions
CAS No.
1309-48-4
EC No.
215-171-9

Features & Benefits

Materials Features

Applications & Uses

Markets
Uses
  • MagChem 40 is well suited for many rubber formulations, particularly neoprene. It finds wide use in the production of oil additives, as a filler, anti-caking agent, and pigment extender. MagChem 40 is extremely efficient in chemical processes where ease of conversion is a factor.

Properties

Physical Form
Typical Properties
ValueUnitsTest Method / Conditions
Magnesium Oxide (MgO)98.2%
Calcium Oxide (CaO)0.8%
Silicon Oxide (SiO2)0.35%
Iron Oxide (Fe2O3)0.15%
Aluminum Oxide (Al2O3)0.1%
Chloride (Cl)0.3%
Sulfate (SO3)0.05%
Loss on Ignition2.3%
Loose Bulk Density22 (0.35)lb/ft3 (g/cm3)
Median Particle Size3 - 8microns
Surface Areamin. 40m2/g
Activity Index9seconds
Passing 325 mesh99.5%

Packaging & Availability

Packaging Type
Packaging
  • Martin Marietta Magnesia Specialties offers avariety of packaging options, including bulk (truck and railcar), bags, and bulk sacks

Storage & Handling

Storage
  • Store in dry place. Exposure to moisture may cause caking.