Chinese Name: Bromine
English Name: Bromine
Chinese Aliases: Bromine, aqueous solution; Liquid bromine; Bromine; Bromine ore
CAS: 7726-95-6
EINECS Number: 231-778-1
Molecular Formula: Br2
Molecular Weight: 159.808
Structural Formula:
Physical and Chemical Properties: Appearance: Red-brown fuming liquid.
Melting Point: -7.2°C
Boiling Point: 58.78°C
Relative Density: 3.119 (20°C)
Solubility: Slightly soluble in water, solubility 3.58g/100ml water (20°C); 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) 3.119 g/cm3. Melting point -7.2°C. Boiling point 58.8°C. Main oxidation states -1, +1, +5, +7. Dark red liquid. Highly volatile. Suffocating odor. Highly toxic! Burns skin and severely irritates mucous membranes and respiratory tract. Slightly soluble in water. Easily soluble in organic solvents. Chemical reactivity is slightly lower 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.
Uses: Mainly used in the production of bromides, and applied in pharmaceuticals, pesticides, dyes, fragrances, photographic materials, fire extinguishers, mineral processing, metallurgy, tanning, water purification, etc. Used as a general analytical reagent, oxidizing agent, absorbent for ethylene and heavy hydrocarbons, and brominating agent in organic synthesis.