Chromium trioxide, an inorganic compound with the chemical formula CrO3, is a dark red or dark purple crystalline powder, soluble in water, sulphuric acid, nitric acid, ethanol, ethyl ether, acetic acid, acetone, and is mainly used in the electroplating industry, the pharmaceutical industry, the printing industry, leather tanning and fabric mordanting.

Automotive urea is a colourless transparent liquid, its main components are urea and distilled water. The chemical formula of urea is CO(NH2)2, a nitrogen-containing organic compounds, with strong reducing properties.

Sulfamic acid is a white crystalline solid, stable and non-hygroscopic. It is soluble in water and formamide and slightly soluble in methanol, ether, acetone and concentrated sulphuric acid. It is classified as a strong inorganic acid and is produced commercially from urea and fuming sulphuric acid.

Chromium oxide generally refers to chromium trioxide. Chromium trioxide, an inorganic compound with the chemical formula Cr₂O₃, is a green crystalline powder, insoluble in water, acid and alkali solutions, soluble in hot alkali metal bromate solutions, mainly used for coloring ceramics and enamel, but also used as an analytical reagent, catalyst.

Sodium silicate, commonly known as effervescent soda ash, is an inorganic substance with the chemical formula Na2O-nSiO2, and its aqueous solution is commonly known as water glass, a mineral binder. Its chemical formula is Na2O-nSiO2, and it is a soluble inorganic silicate with a wide range of uses.

White or light yellow powder or liquid, slightly with grease odor. Easily soluble in water, can reduce the surface tension of aqueous solution and emulsify grease. Insensitive to alkali and hard water, good compatibility with anion and nonion. This product is combustible, irritating and sensitizing. It can be ignited by open fire and high heat. Heat decomposition releases toxic gas.