Triethylamine, an organic compound, systematically named N,N-diethylethylamine, is a colorless and transparent liquid with a strong ammonia odor, slightly fuming in the air. Slightly soluble in water, soluble in ethanol and ether. The aqueous solution is weakly alkaline. Flammable and explosive. Poisonous and highly irritating. In industry, it is mainly used as solvent, curing agent, catalyst, polymerization inhibitor, preservative, and synthetic dye.

EDTA is an organic compound with the chemical formula C10H16N2O8 and is a white powder under normal temperature and pressure. It is a chelating agent that can bind with Mg2+, Ca2+, Mn2+, Fe2+ and other divalent metal ions. Mg2+ is often used as an inhibitor of nucleases and proteases because most nucleases and some proteases require Mg2+. It can also be used to remove the inhibition of heavy metal ions on enzymes.

Solvent oil is one of the five major categories of petroleum products. Solvent oil has a wide range of uses. The largest amount is paint solvent oil (commonly known as paint solvent oil), followed by edible oil, printing ink, leather, pesticides, insecticides, rubber, cosmetics, spices, medicine, electronic components and other solvent oils. At present, there are about 400-500 kinds of solvents on the market, of which solvent naphtha (hydrocarbon solvents, benzene compounds) accounts for about half.

Industrial products are white or light yellow powder. Low molecular weight soluble in ketones, esters and chlorinated hydrocarbon solvents. Higher molecular weight is less soluble.

Caprolactam is an organic compound with C6H11NO. It is widely used in gears, bearings, pipe materials, medical equipment and electrical insulation materials.

Zinc oxide is an inorganic compound associated with type Zn O. ZnO is a white powder, insoluble in water. It is used as an additive in many materials and products, including cosmetics, food supplements, rubber, plastics, ceramics, glass, cement, lubricants, paints, ointments, adhesives, sealants, pigments, foods, batteries, ferrites, flame retardants, and first aid tapes. Although it occurs naturally as the mineral zinc ore, most zinc oxide is synthetic.

Diphenyl methane (4,4' -diisocyanate) (4,4'-Diisocyanate), diphenyl methane (4,4' -diisocyanate), 4,4' -methylene -bisphenyl-isocyanate (4,4' -methylene -bisphenyl-isocyanate), abbreviated 4,4'-MDI or MDI. Diphenyl methane diisocyanate for large tonnage organic chemical products, there are 4,4 '-MDI, 2,4 '-MDI, 2,2 '-MDI isomers, the most used is 4,4 '-MDI. At room temperature, diphenylmethane-4,4' -diisocyanate is white to light yellow fused solid or crystal, with strong irritating smell. Can dissolve in acetone, benzene, kerosene, nitrobenzene, acetone, ether, ethyl acetate, dioxane, flammable in case of open fire, high heat, heat or in case of water, acid exothermic decomposition, release toxic smoke. Diphenylmethane-4,4' -diisocyanate is toxic. Strong irritation to eyes, skin, mucous membranes, inhalation of steam can cause asthma. Diphenylmethane-4,4' -diisocyanate turns yellow at room temperature and is easy to form insoluble dimers, so the product needs to add stabilizer. The stabilizer generally uses toluene sulfonyl isocyanate, carboxyl isocyanate, tritoluene phosphite and 4,4 '-(6-tert-butyl-3, 3-cresol) mixture. Mainly used in plastics, rubber industry; And used as an adhesive. The molecular formula is (C6H4NCO)2CH2.