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White powder. A soft and odorless white powder with strong covering and coloring power, with a melting point of 1560-1580 ℃. Insoluble in water, dilute inorganic acids, organic solvents, oil, slightly soluble in alkali, soluble in concentrated sulfuric acid. It turns yellow when exposed to heat, and then turns white again after cooling. Rutile type (R-type) has a density of 4.26g/cm3 and a refractive index of 2.72. R-type titanium dioxide has good weather resistance, water resistance, and is not prone to yellowing, but its whiteness is slightly poor. Sharp titanium type (Type A) has a density of 3.84g/cm3 and a refractive index of 2.55. A-type titanium dioxide has poor light resistance and is not resistant to weathering, but has good whiteness. In recent years, it has been discovered that nanoscale ultrafine titanium dioxide (usually 10-50 nm) has semiconductor properties, high stability, transparency, activity, dispersion, non toxicity, and color effect.

Titanium dioxide is a white inorganic filler, which can be divided into acute titanium dioxide and rutile titanium dioxide according to its crystalline form. It is mainly used in coatings, plastics, papermaking, inks, and other industries (including cosmetics, chemical fibers, electronics, ceramics, enamel, welding rods, alloys, glass, etc.). The papermaking industry is the third largest application field of titanium dioxide. Adding titanium dioxide to paper can make it have good whiteness, luster, high strength, thin and smooth, non penetrating during printing, and light weight. Sharp titanium dioxide can usually act as a fluorescent whitening agent, increasing the whiteness of paper; Rutile type titanium dioxide is generally used for laminated paper and can meet the requirements of light and heat resistance.

Used in industries such as paint, ink, plastics, rubber, papermaking, and chemical fibers; Used for welding electrodes, extracting titanium, and manufacturing titanium dioxide. Titanium dioxide (nanoscale) is widely used in white inorganic pigments such as functional ceramics, catalysts, cosmetics, and photosensitive materials. It is the strongest coloring agent among white pigments, with excellent covering power and color fastness, suitable for opaque white products. Rutile shaped plastic products are particularly suitable for outdoor use and can provide good light stability to the products. Ruiti type is mainly used for indoor products, but with a slight blue light, high whiteness, strong covering power, strong coloring power, and good dispersibility. Titanium dioxide is widely used as a pigment in paints, paper, rubber, plastics, enamel, glass, cosmetics, inks, watercolors, and oil paints. It can also be used in metallurgy, radio, ceramics, and welding electrodes

The chemical composition of rutile mainly includes TiO2, Ti60%, sometimes containing Fe, Nb, Ta, Cr, Sn, etc; Its name comes from the word "Rulle"; From the Latin word Rutilus, it refers to red, symbolizing the color of rutile. Its main characteristics are: its square columnar shape, twin crystals, and color are identified as identification features; Can be distinguished from cassiterite; Insoluble in acids, adding sodium carbonate for melting can dissolve in silicic acid. If hydrogen peroxide is added, the solution can turn yellow. Because it is formed under high temperature conditions and mainly occurs in gold bearing quartz veins and pegmatite veins of metamorphic rock series. In addition, it appears as a secondary mineral in igneous rocks and is often found in granular form in gneiss; Due to its high chemical stability, rutile is often transformed into sand mines after rock weathering. Rutile, as a bymineral, is found in rocks such as granite, pegmatite, gneiss, mica schist, and eclogite, and is also distributed in sedimentary rocks or sediments in the form of debris or sand ore. Rutile is mainly used for extracting titanium and manufacturing white pigments

Titanium dioxide, also known as titanium dioxide, is a dye and pigment. Titanium dioxide is a very important raw material in industrial production, widely used in industries such as coatings, plastics, papermaking, printing inks, chemical fibers, rubber, cosmetics, ceramics, enamel, electronics, food and medicine, with coatings accounting for the largest proportion, about 60%. The building coating consumes the most titanium dioxide in coating products, accounting for 60% of the coating usage.