Barium sulfate, also known as barium white, is a white crystalline solid with the chemical formula BaSO4, almost insoluble in water and other traditional solvents, and soluble in concentrated sulfuric acid. The main component of barite is barium sulfate, which is a common barium ore. Barium sulfate is a common laboratory and industrial chemical.

Maleic anhydride, also known as 2, 5-furanedione. Rhombic crystals are colorless acicular or flake crystals. Has a strong irritating smell, mainly used in the production of unsaturated polyester resin, alkyd resin, pesticide malathion, high efficiency and low toxicity pesticide 4049, long-acting iodide raw materials. It is also a copolymer of coatings, maleic rosin, polymaleic anhydride, maleic anhydride-styrene copolymer, and also an organic chemical raw material for the production of ink additives, paper additives, plasticizers, tartaric acid, fumaric acid, tetrahydrofuran and so on.

MDI is a polyurethane material synthesized by isocyanate and polyol and its coordinated aid. With its excellent performance, a variety of varieties, and vast uses, it is unique in many synthetic materials and has become one of the fastest -growing materials today. As the main raw material of synthetic polyurethane materials, in the late 1930s, German chemists O. Bayer and his colleagues have developed the synthesis method and processing technology of diisyl acid ester.

Phthalic anhydride, an organic compound,it is a cyclic anhydride formed by dehydration within the phthalic acid molecule. It is a white crystalline powder, insoluble in cold water, slightly soluble in hot water, ether, soluble in ethanol, pyridine, benzene, carbon disulfide, etc. It is an important organic chemical material and an important intermediate in the preparation of phthalate plasticizers, paints, saccharin, dyes and organic compounds.

Sodium dodecyl benzene sulfonate, English name sodium dodecyl benzene sulfonate, referred to as SDBS, is a commonly used anionic surfactant, white or yellowish powder or flaky solid, difficult to volatilize, soluble in water, dissolved in water into a translucent solution. It is chemically stable to alkali, dilute acid and hard water, slightly toxic.

Colorless oily liquid with an aromatic odor，when heated or exposed to sunlight, or in the presence of peroxides, polymerization tends to release heat and can cause an explosion. Explosion limit 1.1% ~ 6.1% (volume).

Flammable liquid. It is hygroscopic and does not corrode metal. React with dibasic acid to form polyester, react with nitric acid to form nitric ester, and react with hydrochloric acid to form chloryl alcohol. It is heated with dilute sulfuric acid at 170℃ to form propional.

Calcium Carbonate:White crystalline powder. Odorless and tasteless. There are two kinds of crystals, one is orthorhombic crystal aragonite. d 2. 83, melting point 825 ℃ (decomposition), decomposed into calcium oxide and carbon dioxide. One is hexagonal rhombic crystal calcite, d25.2 2. 711. melting point 1339 ℃ (10. 39MPa). Almost insoluble in water, soluble in acid.

Toluene, an organic compound with the chemical formula C7H8, is a colourless, volatile liquid with a peculiar aromatic odour. It has strong refractive properties. It is miscible with ethanol, ether, acetone, chloroform, carbon disulphide and glacial acetic acid and is very slightly soluble in water. Flammable, the vapour forms explosive mixtures with air and the mixture can explode at low volume concentrations. Low toxicity, LD50 (rat, oral) 5000mg/kg. high concentration of gas is narcotic and irritating.