ANSHAN HAIMAG INTERNATIONAL TRADE CO., LTD.

The chemical composition is MgSiO₄ which is white crystalline. There are varieties of hydrate containing crystal water, those seen often are anhydride, monohydrate（MgSiO₄·H₂O）and heptahydrate（MgSiO₄7H₂O）which are obtained from the reaction of magnesite or caustic calcined magnesite with sulfuric acid. Heptahydrate is used most often which,  being colorless crystal with bitter and salty taste,  is also called bitter salt. It is normally used as finishing agent and mordant in textiles;  bulking agent in paper-making field; flame-proofing agent intensifying the refractory property for paper and fabric in fire protection field; caccagoge in medicines; ferment accelerator in food processing field etc.

0.004

The molecular formula is MgCO₃; white or white gray lump or powder; density is 3.037; discomposing when heated to 350°C, turning into magnesium oxide when heated to  700°C. Natural raw magnesite is good to ordinary applications whilst that of high purity can be obtained through chemical synthesizing (for example, to mix magnesium sulphate with the solution of sodium carbonate and then be heated, precipitated, filtrated, dehydrated and exsiccated). It is mainly used as reinforcer for natural rubber, moisture proof material, leavening agent for bread and biscuits, photo extinction additive for coatings and paint, base stocks for making toothpaste, cosmetics and medicines.

Brand

Chemical composition (%)

Size
(mm)

MgO ≥

SiO₂ ≤

CaO ≤

LM-47

47

0.6

0.6

as per Buyer's requirement

LM-46

46

1.2

0.8

LM-45

45

1.5

1.5

Molecular formula is MgO; white powder, non-soluble to acid, slightly soluble to water, smell-less, tasteless, nontoxic.  Producing method: first making raw magnesite into magnesium hydroxide then let this react with carbon dioxide so as to forming magnesium carbonate which is finally fired into magnesium oxide. 

Magnesium oxide or lightweight magnesium oxide is a kind of basic chemical materials with various applications, such as skin nourishing cream in cosmetics, material for making some refractories, deslagging agent steel making furnace; material or additive for making paints, coatings, dyestuffs, adhesives, buffing compound, glass, porcelain enamel; rubber stuffing, paper stuffing, plastic compounding agent, food additive, water processing agent, catalyst carrier, insulating coating for silicon steel sheet, basic material for some magnetic materials and medicines etc.