Sodium Persulfate is also called sodium sulfate, is an inorganic substance, a chemical formula is Na2S2O8, and the appearance is a white crystal powder, odorless.

The solubility in water was 549 g / L at 20 ° C. Relative density 2.400 (deposit density: 0.7).

Sodium peroxide is an inorganic substance with a chemical formula of Na2O2 and a molecular weight of 77.98. Beige powder or granules. The relative density is 2.8.

Can gradually decompose, moist and high temperatures can accelerate decomposition. Can be decomposed by ethanol and silver ion.White crystalline powder.

Potassium hydroxide is strongly alkaline and corrosive, and its properties are similar to sodium hydroxide, which can cause burns. It can absorb water and dissolve in the air, and absorb carbon dioxide to gradually become potassium carbonate. The pH of the 0.1 mol/L solution is 13.5.

White oblique crystals, industrial products are white or light gray lumps or rods. Easily soluble in water, emits a lot of heat of dissolution when dissolved, soluble in ethanol, slightly soluble in ether. It is deliquescent and has strong water absorption. Potassium hydroxide is strongly alkaline and corrosive, and its properties are similar to sodium hydroxide, which can cause burns. It can absorb water and dissolve in the air, and absorb carbon dioxide to gradually become potassium carbonate. The pH of the 0.1 mol/L solution is 13.5.

The industrial neighborl xylene is a raw material, first washes the acid layer to the acid layer colorless, then use 10% sodium hydroxide solution, water is washed to pass, and the aqueous layer is separated, and the calcium chloride is borned with anhydrous carbon. After the distinction is low, the intermediate fraction is collected, that is, a pure product.

Potassium hydroxide is a common inorganic base with a chemical formula of KOH and a molecular weight of 56.1. It is a white powder or flake solid at room temperature.

Helium is a rare gas. Its English name is Helium, and its element symbol is He. It is a colorless and odorless inert gas. Its chemical properties are not vivid. Under normal conditions, it is difficult to react with other substances.

The propanol, but also glycerol, chemical formula is C3H8O3, colorless, odorless, sweet, and appearance showing a clear liquid, is an organic substance, can absorb moisture from air, can also absorb hydrogen sulfide, hydrogen cyanide and sulfur dioxide .

Methyl 2-chloropropionate is an organic compound with the chemical formula C4H7ClO2, mainly used as an intermediate in pesticides, pharmaceuticals, and spices.

Dibenylmethane diisocyanate, referred to as "MDI", is an organic substance, a chemical formula C15H10N2O2.

Titanium dioxide is an inorganic, chemical formula TiO2, white solid or powdered amphoteric oxide, molecular weight 79.9, has non-toxic, optimal opacity, optimal whiteness and brightness, is considered to be the best in the world today A white pigment.

In the textile industry, it is used as a dispersant for fiber lubricants and chemical fiber oils, as well as automotive brake fluids, pesticide dispersants, dry cleaning agents, cutting oil solvents, organic synthesis intermediates, auxiliary solvents for mineral oil emulsions, and analytical reagents.

Solubility: Insoluble in water, acid and alkali, but soluble in organic solvents such as alcohol, ether and benzene.The preparation methods of biphenyl include the chemical composition method of making biphenyl through benzene pyrolysis and the separate extraction method of making biphenyl through various coal tar fractions. The mass fraction of biphenyl in coal tar is 0.20%-0.40%, and coal tar extraction method and chemical composition method coexist.

HCFC-141b (monofluorodichloroethane) is a high-purity liquid widely used in cleaning and solvent fields.

Features: Contains two hydroxyl groups and one amino group. Hydroxyl reduces the vapor pressure, increases the solubility, is conducive to the absorption of acid gas, and can increase the concentration, reduce circulation, and reduce energy consumption. The presence of the methyl group in the amino group reduces the alkalinity and activity of the amino group and reduces the CO2 absorption rate. The molecular weight is 119.16, the melting point is -21°C, the flash point is 127°C, the freezing point is -21°C, and the refractive index is 1.4678. The viscosity (20°C) is 101 MPa·sec.

Biphenyl, whose molecular formula is C12H10, is an important organic raw material and is widely used in the fields of medicine, pesticides, dyes, and liquid crystal materials.

Appearance and properties: colorless liquid, almost odorless Molecular weight 90.12 Vapor pressure 0.51 kPa/20℃ Flash point: 43℃ Melting point -70°C boiling point: 135.1°C solubility can be miscible with water and most organic solvents such as ethanol Density (D4) 0.925-0.935