Methyl methacrylate (MMA), also known as methyl isobutyrate, is an organic compound with the chemical formula C5H8O2, a colourless liquid, slightly soluble in water, soluble in most organic solvents such as ethanol, mainly used as a monomer for organic glass, also used in the manufacture of other resins, plastics, coatings, adhesives, lubricants, impregnating agents for wood and cork, paper polish, etc.

Polytetrahydrofuran is a white waxy solid that is easily soluble in alcohols, esters, ketones, aromatics and chlorinated hydrocarbons, but insoluble in aliphatic hydrocarbons and water. When the temperature exceeds room temperature, it will become a transparent liquid.

L-ascorbate-2-phosphate trisodium salt， Chinese alias vitamin C phosphate sodium, SAP, L-ascorbate-2-phosphate sodium salt. Trisodium L- ascorbic acid -2- phosphate can be used as intermediate in pharmaceutical chemical synthesis.

Tolyuene -2, 4-diisocyanate is an important intermediate in organic synthesis. It has high reactivity and can react with amines, alcohols and phenols to produce urea, urate and ester.
It is colorless and transparent liquid at normal temperature and pressure, and is more sensitive to water. It is a relatively stable compound, but easily hydrolyzes and should be kept in a cool, dry, well-ventilated place away from direct sunlight.

Calcium fluoride is the main component of fluorspar or fluorspar, the chemical formula CaF2, colorless cubic crystal or white powder. The relative density is 3.18, the melting point is 1423℃, and the boiling point is about 2500℃

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.