Hypromellose (Hypromellose), also called hypromellose, is one of the non-ionic cellulose mixed ethers.

Molecular weight: 65.39 Grade: 5N MDL number: MFCD00011291 EC number: 231-175-3

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.

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

Carbonide is a kind of inorganic compound with CS2 chemical formula. It is a colorless liquid and is a common solvent.

M-xylene is an organic compound with a molecular formula C8H10, a molecular weight of 106, a colorless concussion liquid, a odor like toluene.

Glycerol, also called glycerol, with the chemical formula c3h8o3, is colorless, odorless, sweet, with a clean and viscous liquid appearance. it's miles an organic substance that may take in moisture from the air, as well as hydrogen sulfide, hydrogen cyanide and sulfur dioxide. insoluble in benzene, chloroform, carbon tetrachloride, carbon disulfide, petroleum ether and oils, it's miles the skeleton factor of triglyceride molecules.

Zinc Borate is an environmentally friendly non -halogen flame retardant. It has the characteristics of non -toxic, low -water solubility, high heat stability, small particle size, small gravity, and good decentralization. As a high -efficiency flame retardant Rubber, coatings and other fields.

Methacrylic acid is colorless crystal or transparent liquid with pungent odor. Soluble in hot water, soluble in most organic solvents such as ethanol and ether. Easily polymerized into water-soluble polymers. Combustible, there is a danger of burning in case of high heat and open flame, and it can produce toxic gas when heated.

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.

Glass material is referred to as a glass instrument. Many glass instruments are used in the laboratory, which is highly chemically stable, thermal stability, and well-transparent, and good insulation function.

From the perspective of physics, the methods to eliminate foam mainly include placing baffles or filters, mechanical stirring, static electricity, freezing, heating, steam, radiation, high-speed centrifugation, pressure and decompression, high-frequency vibration, instantaneous discharge and ultrasonic (acoustic) Liquid control), etc., these methods promote the gas permeation rate at both ends of the liquid film and the drainage of the bubble film to varying degrees, so that the stability factor of the foam is smaller than the attenuation factor, and the number of foams is gradually reduced.

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 .

N-butanol is an organic compound of the molecular formula C4H10O, which has a strong flame when the colorless transparent liquid is combined.

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.

Biphenyl is found in coal tar, crude oil and natural gas. 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.

A substance that can reduce the surface tension of water, solution, suspension, etc., prevent the formation of foam, or reduce or eliminate the original foam. [1]

When the temperature drops to 2.18K, the properties of liquid helium will change suddenly, the viscosity is very small, and it becomes a super fluid that can flow upwards along the wall of the container. The thermal conductivity is 800 times that of copper. It becomes a thermal conductor with excellent thermal conductivity. Its specific heat capacity, surface tension, and compressibility are all abnormal. This abnormal liquid is called liquid helium II, and the normal liquid helium is called liquid helium I.