1.Appearance: Shined with metallic 2.Purity: 4N 3.Si: 99.99% 4.Application: Widely used in fire-resistant material Industry Specifications4N ... :Metallic dark gray Trademark4NMain component Si, not less than (%) 99.99Content of other elements, not more than (%) Al0.003B0.0005Ca0.0002Cr0 ... , silicone, ceramics, electronics, military, chemical, and photovoltaic industries. high purity 4n silicon metal