Magnesium Oxide(Magnesia)

STARMAG is lightly burned high-purity magnesia that is isolated from seawater by a seawater process. Magnesium oxide STARMAG is available for a variety of uses.

STARMAG #150 / #50 / #20

STARMAG #150 is a high-active product. STARMAG #50 is a medium-active product and STARMAG #20 is a low-active product. The products of each grade have special characteristics such as good dispersibility and workability for various polymers.

STARMAG CX

STARMAG CX is a surface-treated type. This is a brand that has been improved in hygroscopic property, dispersibility in polymers and adherence to rolls.

STARMAG P / KS

STARMAG P and KS are pharmaceutical-grade products.
STARMAG KS is a granular type. It has good flowability and helps to improve productivity.

STARMAG PSF

STARMAG PSF is a fine-powder type of average particle size (1um). It contains less metal elements such as Fe, etc. It has a high purity and whiteness.

Typically Characteristic Analysis
Item of Quality #150 #50 #20 CX-150 P KS PSF-150 PSF
Chemical Analysis Moisture(%) 0.5 0.5 0.5 0.5 0.5 0.5 1.5 0.5
Loss on Ignition(%) 6.5 2.5 1.5 13.0 1.0 1.0 6.5 1.0
MgO *1(%) 98.0 97.7 97.7 98.0 98.1 98.1 99.5 99.5
CaO(%) 0.6 0.6 0.6 0.6 0.6 0.6 0.3 0.2
Fe(%) 0.02 0.02 0.02 0.02 0.02 0.02 0.003 0.004
Al(%) 0.01 0.01 0.01 0.01 0.01 0.01 0.004 0.003
Acid Insoluble
Substances(%)
0.01 0.01 0.01 0.01 0.02 0.02 0.01 0.01
Bulk Density(g/ml) 0.55 0.55 0.55 0.60 0.60 1.0 0.40 0.45
Average Particle Size(um) 3.5 3.5 3.5 3.5 3.5 - 0.5 1.0
Specific Surface Area (BET)(m2/g) 145 50 25 110 10 10 145 10
Screen Residue (75um)(%) 0.01 0.01 0.01 0.01 0.03 - 0.001 0.001

*1 Measured after Ignition

Standard Packing

Net weights are 20kg and 10kg. Products are packed in multilayer paper bags with a separately sealed polyethylene inner bag.

Main Applications

* Chloroprene rubbers / Chlorinated polyethylene / Chloroprene rubbers adhesives/ Various synthetics rubbers / Plastics / Ceramics / Glasses / Ferrite / Animal feed additives / Absorbents / Food additives / Silicon steel / Magnesia cements / Whetstones