IND | EN

Chrome oxide is an inorganic substance with the chemical formula Cr2O3. It is a small hexagonal crystal from light green to dark green. It turns brown when hot, and still turns green when cold. The crystals are extremely hard and stable, and there is no change even if hydrogen is injected under red heat. It is soluble in heated potassium bromate solution, slightly soluble in acids and alkalis, and almost insoluble in water, ethanol and acetone. There is also irritation molecular weight is 151.99, in hexagonal system, light green or dark green powder. 

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Picture 3.6.6.0 - 14
Density  5.21 g/cm3 
Moh's hardness  8.5 ~ 9 
Melting point  2265 °C 
Refractive index  2.5 
Boiling point  3654 °C 
Molecular weight  151.99 
Color  Metallic luster, with the characteristic of magnetism great hiding powder feature 
Stability 

 

Stable to liqht, atmosphere, and corrosive qases (H2S, SO2, etc.), has excellent weather resistance, thermal stability 

Product Specification: 

Classification  EINECS NO. 215-160-9  ACS NO. 1308-38-9 
Appearance  Light green or dark green powder 
Index  SA-1  SA-2 
Cr2O3  >99%  >99% 
Water soluble substance  <0.3%  <0.3% 
Moisture  <0.2%  <0.2% 
Thermostability  1100  1100 

Chrome oxide is used to make abrasive materials, widely used in stainless steel, diamond, precision machine, etc. for polishing and abrasive. SA-2 (one of COG material) is used in stainless steel for no scratch polishing surface of large area, with high-precision. And it can be used for green cutting and grinding disc. 

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