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Sodium borohydride is an inorganic substance with a chemical formula of NaBH₄. It is white to off-white fine crystalline powder or lumps. It has strong hygroscopicity. Its alkaline solution is brownish yellow. It is one of the most commonly used reducing agents. Soluble in water, liquid ammonia and amines. Easily soluble in methanol, slightly soluble in ethanol and tetrahydrofuran. Insoluble in ether, benzene and hydrocarbons. It is stable in dry air, decomposes in humid air, and also decomposes when heated at 500°C.

Pyridine is a colorless or slightly yellow liquid with weak alkalinity and special odor. It naturally exists in coal tar, shale oil, coal gas and petroleum. It is miscible with most organic solvents such as water, alcohol, ether, petroleum ether, oil, benzene, chloroform, etc. It is an important chemical raw material and solvent.

The important derivatives of pyridine are niacin, nicotinamide, isoniazid, nicotine, strychnine, vitamin B6 and so on. Pyridine and its derivatives are widely used in the production of medicines, pesticides, rubber and dyes.

Diketene is an organic substance with a chemical formula of C₄H₄O₂. It is a colorless, transparent, and tear-causing liquid. Diketene is also known as acetylketene or ketene dimer. The flash point is 35.2°C, the melting point is -6.5°C, the boiling point is 127.4°C, the refractive index is nD1.4379, the relative density is d201.0897, the latent heat of evaporation is 690.82J/mol, and the heat of generation is 4.526J/mol. It is a colorless and transparent liquid with tear gas.

Lithium products: Lithium, a chemical element, is a metal with strong metal activity and the lightest among all metals. Because lithium has a large charge density and a stable helium-type double electron layer, lithium is easy to polarize other molecules or ions, but it is not easy to polarize itself. Lithium-ion batteries made of lithium materials are high-energy storage media. Due to the rapid development of lithium-ion batteries, the business of lithium mining, lithium carbonate and other companies has been driven to vigorously develop. Metal lithium batteries also have applications in the military field.

Amine refers to the product in which one or more hydrogen atoms in the ammonia molecule is replaced by a hydrocarbon group. According to the number of hydrogen atoms in the amine molecule, the amine can be divided into primary amine, secondary amine, and tertiary amine; amines are widely present in biology In the world, it has extremely important physiological and biological activities. For example, proteins, nucleic acids, many hormones, antibiotics and alkaloids are all amine derivatives.

Nitrile contains an organic compound formed by linking the carbon atoms of a hydrocarbon group and a cyano group. It is a type of organic compound containing an organic group -CN. Colorless liquid or solid, with special odor, decomposes in acid or alkali. Both are highly toxic, and can cause combustion or explosion when exposed to open flames, high heat, strong acids and oxidants. Commonly used in synthetic resins, fibers, rubber, medicine, pesticides and dyes.

Alcohol ether solvents are mixed with other solvents in solvent-based paints. Its characteristic is that it can maintain the leveling of the coating film after most of the solvents evaporate. Alcohol ether solvents have good compatibility with water and are widely used in water-based coatings as co-solvents for coupling.