Chinese name: Bromine

English name: Bromine

Alias: Bromine, aqueous solution, liquid bromine, bromine, bromine ore

English alias: Bromine solution, Bromine water, Bromine (Standard State)

CAS:7726-95-6

EINECS:231-778-1

Chemical formula:Br2

Molecular weight:159.808

inchi:InChI=1/Br2/c1-2

Density:2.91g/cm³

Melting point: -7.2℃

Boiling point: 58.8°C at 760 mmHg

Water solubility: 35 g/L (20℃)

Vapor pressure: 190mmHg at 25°C

Refractive index: 1.55

Physical and chemical properties
Appearance: Red-brown fuming liquid. 

Melting point: -7.2℃ 

Boiling point: 58.78℃ 

Relative density: 3.119 (20℃) 

Solubility: Slightly soluble in water, solubility 3.58g/100ml water (20℃); easily soluble in ethanol, ether, chloroform, carbon tetrachloride, kerosene, carbon disulfide, and other organic solvents; also soluble in hydrochloric acid, hydrobromic acid, and bromine compound solutions. 

Group 17 (VIIA) element. Atomic number 35. Stable isotopes 79, 81. Density (liquid) 3.119g/cm³. Melting point -7.2℃. Boiling point 58.8℃. Main oxidation states -1, +1, +5, +7. Dark red liquid. Volatile. Suffocating odor. Highly toxic! Burns skin, severely irritates mucous membranes and respiratory tract. Slightly soluble in water. Easily soluble in organic solvents. Chemical reactivity is slightly less than chlorine. Can combine with most metals and non-metals. Strong oxidizing agent. Bromine mainly exists as alkali metal bromides in seawater. Can be extracted from bromides in seawater.

Product use: Mainly used to prepare bromides, and used in medicine, pesticides, dyes, fragrances, photographic materials, fire extinguishing agents, mineral processing, metallurgy, tanning, water purification, and other sectors. Used as a general analytical reagent, oxidizing agent, absorber for ethylene and heavy hydrocarbons, and brominating agent in organic synthesis.