dibromine brief introduction
Bromine is a chemical element and a halogen; Element symbol Br, atomic number 35. Bromine molecules are volatile reddish brown liquids at standard temperature and pressure, with activity between chlorine and iodine. Pure bromine is also known as bromine. Bromine vapor is corrosive and toxic. In 2007, approximately 556000 metric tons of bromine were manufactured. Bromine and its compounds can be used as flame retardants, water purifiers, insecticides, dyes, and so on. Red medicine, which was once a commonly used disinfectant, contains bromine and mercury. In photography, compounds of bromine and iodine with silver act as sensitizers.
dibromine Basic information
| Chinese name | 溴 | English name | dibromine |
|---|---|---|---|
| Chinese alias | 溴素;溴单质;溴水;液溴; | English alias | Bromine;Br2; |
| CAS | 7726-95-6 | Molecular formula | Br2 |
| Molecular weight | 159.80800 | Accurate mass | 157.83700 |
| PSA | 0.00000 | LOGP | 1.69120 |
dibromine Numbering system
| UNII | SBV4XY874G |
|---|
dibromine Physical and Chemical Properties
Appearance and characteristics:
Dark red liquid or slightly red brown gas
Density:
3.119 g/mL at 25 °C(lit.)
Boiling point:
58.8 °C(lit.)
Melting point:
−7.2 °C(lit.)
Flash point:
113 °C
Refractive index:
one point five five
Water solubility:
35 g/L (20 ºC)
Stability:
Stable. Incompatible with reducing agents, alkali metals, powdered metals, steel, iron, copper, organic materials.
Storage conditions:
The warehouse is ventilated, low-temperature, and dry, and stored separately from combustibles, organic matter, and easily oxidizable substances
Steam density:
7.14 (vs air)
Steam pressure:
175 mm Hg ( 20 °C)
security information
RTECS：
EF9100000
Safety instructions:
S26-S45-S61-S7/9-S36/37/39-S28-S53
Hazard category code:
R26; R35; R50
WGK Germany：
two
Customs code:
two billion eight hundred and one million three hundred and two thousand
Dangerous goods transportation code:
UN 1744 8/PG 1
Hazard category:
eight
Packaging grade:
I
Dangerous goods signs:
T+; C; N
Hazard description:
H314; H330; H400
Signal words:
Danger
Danger signs:
GHS05, GHS06, GHS09
Hazard prevention instructions:
P260; P273; P280; P284; P305 + P351 + P338; P310
Production method and purpose
use to
Mainly used for the production of bromides, and in pharmaceuticals, pesticides, dyes, fragrances, photographic materials, fire extinguishing agents, mineral processing, metallurgy, tanning, water purification, etc. It is also used as a common analytical reagent, absorbent for ethylene and heavy hydrocarbons, and brominating agent for organic synthesis.
