Aqueous ammonia 20-25%

Ammonia water, also known as ammonia water, refers to the aqueous solution of ammonia, which is colorless, transparent and has a pungent odor. Ammonia water is volatile and has partial alkali permeability. It is prepared by passing ammonia into water. Industrial ammonia water is an aqueous solution containing 25%~28% ammonia. Only a small part of ammonia molecules in the ammonia water react with water to form ammonium ions and hydroxide ions, namely ammonia monohydrate, which is a weak base only existing in the ammonia water.

Silver iodide 99%

Silver iodide is an inorganic substance with the chemical formula of AgI. It is a bright yellow odorless microcrystalline powder with α and β Two types, α Type B is a cubic crystal, with a density of 6.010g/cm3, a melting point of 558 ℃, and a boiling point of 1506 ℃. β Type B is hexagonal crystal, with a density of 5.683g/cm3, which is converted to α Type. It is insoluble in dilute acid, water, slightly soluble in ammonia, and easily soluble in potassium iodide, potassium cyanide, sodium thiosulfate and methylamine. Whether silver iodide is solid or liquid, it has photosensitive characteristics, and can feel light from ultraviolet to about 480 mm wavelength.

Nickel formate 99%

Nickel formate is an organic compound. Nickel formate, also known as nickel formic acid, is a green monoclinic crystal or crystalline powder with a relative density of 2.154. When it is carefully heated to 130~140 ℃, it becomes anhydrous salt. It is decomposed into nickel, carbon monoxide, carbon dioxide, hydrogen, water and methane at 180~200 ℃. Soluble in water. It is prepared by the reaction of nickel sulfate solution with sodium formate or nickel hydroxide dissolved in formic acid. Used for manufacturing nickel and nickel catalyst, etc.

Strontium bromide 98%

Strontium bromide is an inorganic compound. There are anhydrous and hexahydrate. Anhydrous matter is white hexagonal acicular crystal. Density 4.216g/cm ³。 The melting point is 643 ℃. Soluble in water, ethanol and amyl alcohol. Hexahydrate is colorless hexagonal crystal or white crystalline powder. Soluble in water, methanol and ethanol. Slightly soluble in acetone. Insoluble in ether. It has deliquescence. When heated to 180 ℃, it loses crystalline water and becomes anhydrous.

P-nitrobenzoic acid 99%

P-nitrobenzoic acid is a yellow-white crystal. It is soluble in ethanol, ether, chloroform, acetone and boiling water, slightly soluble in benzene and carbon disulfide, and insoluble in petroleum ether. It is used to synthesize procaine, procaine amide,