Propylene oxide

Propylene oxide is a colorless ether flavored liquid with low boiling point, flammability and chirality. Industrial products are generally racemic mixtures of two enantiomers. It is partially miscible with water, ethanol and ether. It forms a binary azeotropic mixture with pentane, pentene, cyclopentane, cyclopentene and dichloromethane. Toxic, irritating to mucous membrane and skin, can damage cornea and conjunctiva, cause respiratory system pain, skin burn and swelling, and even tissue necrosis.

Methyl ethyl ketone (MEK)

Methyl ethyl ketone is an organic compound with a molecular weight of 72.11. It is a colorless transparent liquid with an odor similar to acetone. Volatile. It is miscible with ethanol, ether, benzene, chloroform and oil. Soluble in 4 parts of water, but the solubility decreases when the temperature rises, and can form an azeotropic mixture with water. Low toxicity, median lethal dose (rat, oral) 3300mg/kg. Flammable, vapor can form explosive mixture with air. High concentrations of steam are anesthetic.

N. N-dimethylformamide

N. N-dimethylformamide, an organic compound, is a colorless transparent liquid. It is not only a widely used chemical raw material, but also a widely used excellent solvent. Except halogenated hydrocarbons, it can be mixed with water and most organic solvents at will, and has good solubility in a variety of organic and inorganic compounds.

Methylenediphenyl diisocyanate (MDI)

MDI is a polyurethane material synthesized by isocyanate, polyol and its auxiliary agent. With its excellent performance, various varieties and wide applications, MDI is unique among many synthetic materials and has become one of the fastest growing materials today.

Toluene diisocynate (TDI)

Toluene diisocyanate (TDI) has six isomers: 2,3-TDI, 2,, 4-TDI, 2,5-TDI, 2,6-TDI, 3,4-TDI, 3,5-TDI. Among them, 2,4-TDI and 2,6-TDI are the most common. Industrial products are usually a mixture of 2,4-TDI and 2,6-TDI.