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470864

Sigma-Aldrich

Bromine

≥99.99% trace metals basis

Synonym(s):

Dibromine

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About This Item

Empirical Formula (Hill Notation):
Br2
CAS Number:
7726-95-6
Molecular Weight:
159.81
EC Number:
231-778-1
MDL number:
MFCD00010896
UNSPSC Code:
12352101
PubChem Substance ID:
24870690
NACRES:
NA.22

vapor density

7.14 (vs air)

Quality Level

100

vapor pressure

175 mmHg ( 20 °C)
671 mmHg ( 55 °C)

Assay

≥99.5% (by Na2S2O3, titration)
≥99.99% trace metals basis

resistivity

7.8E18 μΩ-cm, 20°C

impurities

≤0.001% I2
≤0.001% S compounds
<100 ppm total metallic impurities

evapn. residue

≤0.005%

bp

58.8 °C (lit.)

mp

−7.2 °C (lit.)

density

3.119 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤0.05%

cation traces

Ni: ≤5 ppm
heavy metals: ≤2 ppm

SMILES string

BrBr

InChI

1S/Br2/c1-2

InChI key

GDTBXPJZTBHREO-UHFFFAOYSA-N

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Application

Bromine can be used as a brominating and oxidizing agent in chemical synthesis.
It can be used:
  • To brominate alkylbenzenes at the benzylic position using photocatalytic conditions.
  • To prepare brominated aromatic compounds by electrophilic aromatic substitution reactions in the presence of Lewis acid catalysts.
  • For the bromination of carbonyl compounds at a carbonyl group via Hell-Volhard-Zelinski reaction in the presence of phosphorus trihalides.
  • To prepare isocyanates, carbamates, or amines by reacting with primary amides in the presence of base via Hofmann rearrangement.

Other Notes

Contains organic bromine compounds

Signal Word

Danger

Hazard Statements

H314,H330,H400

Hazard Classifications

Acute Tox. 1 Inhalation - Aquatic Acute 1 - Eye Dam. 1 - Skin Corr. 1A

Storage Class Code

6.1B - Non-combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

WGK

WGK 2

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

PRTR

Class II Designated Chemical Substances

ISHL Indicated Name

Substances Subject to be Indicated Names

ISHL Notified Names

Substances Subject to be Notified Names

JAN Code

470864-250G:4548173156057
470864-VAR:
470864-BULK:
470864-50G:4548173156064

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Certificates of Analysis (COA)

Lot/Batch Number
SHBQ6654
SHBP8808
SHBN5393
MKCK4524
SHBJ1858

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Bromine
Goehring RR
Encyclopedia of Reagents for Organic Synthesis, Second Edition (2001)
Use of bromine and bromo-organic compounds in organic synthesis
Saikia I, et al.
Chemical Reviews, 116, 6837-7042 (2016)
Jenny Rattfelt Nyholm et al.
The Science of the total environment, 443, 307-314 (2012-12-04)
The environmental occurrence of potentially emerging brominated flame retardants (BFRs) was investigated near suspected source zones in Norway, within seepage water, sewage waste water, sewage sludges, and sediments. Analyzed emerging BFRs included 1,2-dibromo-4-(1,2-dibromoethyl) cyclohexane (TBECH), 1,2-bis(2,4,6-tribromophenoxy) ethane (BTBPE), decabromodiphenylethane (DBDPE)
Chia-Hui Lee et al.
Scientific reports, 5, 10013-10013 (2015-06-13)
Tungsten ditelluride (WTe2) is a transition metal dichalcogenide (TMD) with physical and electronic properties that make it attractive for a variety of electronic applications. Although WTe2 has been studied for decades, its structure and electronic properties have only recently been
Aizhen Huang et al.
Environmental science & technology, 47(1), 518-525 (2012-12-04)
Direct evidence was first demonstrated for the oxidative degradation of decabromodiphenyl ether (BDE209) in aqueous TiO(2) dispersions under UV irradiation (λ > 340 nm). BDE209 was hardly debrominated over TiO(2) in UV-irradiated acetonitrile dispersions, but the addition of water into
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