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277576

Sigma-Aldrich

Bromine

ACS reagent, ≥99.5%

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About This Item

Fórmula empírica (notación de Hill):
Br2
Número de CAS:
7726-95-6
Peso molecular:
159.81
Número CE:
231-778-1
Número MDL:
MFCD00010896
Código UNSPSC:
12141915
ID de la sustancia en PubChem:
329753018
NACRES:
NA.21
Ensayo:
≥99.5%
grado:
ACS reagent
Formulario:
liquid
En este momento no podemos mostrarle ni los precios ni la disponibilidad

grado

ACS reagent

Nivel de calidad

200

densidad de vapor

7.14 (vs air)

presión de vapor

175 mmHg ( 20 °C)
671 mmHg ( 55 °C)

Ensayo

≥99.5%

Formulario

liquid

resistividad

7.8E18 μΩ-cm, 20°C

impurezas

organic bromine compounds, passes test
≤0.001% I2
≤0.001% S compounds

residuo de evap.

≤0.005%

bp

58.8 °C (lit.)

mp

−7.2 °C (lit.)

densidad

3.119 g/mL at 25 °C (lit.)

trazas de anión

chloride (Cl-): ≤0.05%

trazas de catión

Ni: ≤5 ppm
heavy metals: ≤2 ppm

cadena SMILES

BrBr

InChI

1S/Br2/c1-2

Clave InChI

GDTBXPJZTBHREO-UHFFFAOYSA-N

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Descripción general

Bromine is a highly volatile and reactive halogen that can be used as a powerful brominating and oxidizing agent in chemical synthesis.

Aplicación

Bromine can be used as a brominating agent for the bromination of:
  • Aromatic and heterocyclic compounds. 
  • Carbonyl compounds at α position to carbonyl groups.
  • Aromatic carboxylic acids via Hell-Volhard-Zelinski reaction in the presence of phosphorus trihalides.
  • Alkylbenzenes at the benzylic position using photocatalytic conditions.

It can also be used as an oxidizing agent for the oxidation of:
  • Primary alcohols to either aldehydes or esters.      
  • Secondary alcohols to ketones.

It can also be used as a Lewis acid catalyst to:     
  • Convert epoxides and CO2 to cyclic carbonates in a continuous flow system.     
  • Synthesize bis(indolyl)methanes by reacting indoles with carbonyl compounds.

Palabra de señalización

Danger

Frases de peligro

H314,H330,H400

Clasificaciones de peligro

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

Código de clase de almacenamiento

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

Clase de riesgo para el agua (WGK)

WGK 2

Punto de inflamabilidad (°F)

Not applicable

Punto de inflamabilidad (°C)

Not applicable

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Certificados de análisis (COA)

Lot/Batch Number
SHBS5075
SHBS5074
SHBS1836
SHBS1837
SHBP9508

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Isotopic standard for bromine NIST® SRM® 977

NIST977

Isotopic standard for bromine

Acetato de etilo biotech. grade, ≥99.8%

Sigma-Aldrich

494518

Acetato de etilo

Reaction of bromine and chlorine with phenolic compounds and natural organic matter extracts-Electrophilic aromatic substitution and oxidation.
Criquet J, et al.
Water Research, 85, 476-486 (2015)
The chemistry of atmospheric bromine.
Wofsy SC, et al.
Geophysical Research Letters, 2(6), 215-218 (1975)
Bromine-catalyzed aziridination of olefins. A rare example of atom-transfer redox catalysis by a main group element.
Jeong JUK, et al.
Journal of the American Chemical Society, 120(27), 6844-6845 (1998)
Jennifer A Kozak et al.
Journal of the American Chemical Society, 135(49), 18497-18501 (2013-11-22)
A continuous method for the formation of cyclic carbonates from epoxides and carbon dioxide (CO2) is described. The catalysts used are inexpensive and effective in converting the reagents to the products in a residence time (t(R)) of 30 min. The
Teresa M Bisson et al.
Environmental science & technology, 46(21), 12186-12193 (2012-10-02)
Recent laboratory and field-scale experiments demonstrated the potential for brominated industrial solid waste from biomass combustion (Br-Ash) to be an efficient, cost-effective alternative to activated carbon for capturing mercury from coal-fired power plants. To develop this attractive alternative technology to
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Questions

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  1. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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  2. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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