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247642

Sigma-Aldrich

Xilenos

Xylenes

ACS reagent, ≥98.5% xylenes + ethylbenzene basis

Sinônimo(s):

Mistura de isômeros de xileno

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About This Item

Fórmula linear:
C6H4(CH3)2
Número CAS:
1330-20-7
Peso molecular:
106.17
Número MDL:
MFCD00077264
Código UNSPSC:
12352002
ID de substância PubChem:
329752747
NACRES:
NA.21
Preço e disponibilidade não estão disponíveis no momento.

grau

ACS reagent

Nível de qualidade

200

densidade de vapor

3.7 (vs air)

pressão de vapor

18 mmHg ( 37.7 °C)

Ensaio

≥98.5% xylenes + ethylbenzene basis

Formulário

liquid

composição

C6H5CH2CH3, ≤25%

Lim. expl.

7 %

dilution

(for analytical testing)

Impurezas

H2SO4, passes test
≤0.003% S compounds
≤0.05% water

resíduo de evaporação

≤0.002%

cor

APHA: ≤10

índice de refração

n20/D 1.497 (lit.)

p.e.

137-140 °C (lit.)

pf

-34 °C

densidade

0.86 g/mL at 25 °C (lit.)

cadeia de caracteres SMILES

Cc1ccc(C)cc1.Cc2cccc(C)c2.Cc3ccccc3C

InChI

1S/3C8H10/c1-7-3-5-8(2)6-4-7;1-7-4-3-5-8(2)6-7;1-7-5-3-4-6-8(7)2/h3*3-6H,1-2H3

chave InChI

MVZVDAGWAAZJPE-UHFFFAOYSA-N

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Descrição geral

Os xilenos são uma mistura das formas isoméricas orto,meta e para do xileno, que é um hidrocarboneto aromático amplamenteusado como solvente em várias reações químicas.

Aplicação

Os xilenos podem ser usados como solvente:
  • no acoplamento cruzado Suzuki catalisado por tetrafosfina/paládio com halogenetos de arila estericamente impedidos e ácidos arilborônicos para sintetizar adutos biliares tri-orto-substituídos.
  • Para a N-alquilação de aminas ou amônia com álcoois para sintetizar N-alquil aminas.
  • Para sintetizar poliimidas aromáticas por meio da reação de diaminas e dianidridos fosfinados não simétricos via polimerização em solução.

Embalagem

frascos polirrevestidos disponíveis: números de produto 247642-1L-CB, 247642-4L-CB e 247642-4X4L-CB

Palavra indicadora

Danger

Classificações de perigo

Acute Tox. 4 Dermal - Acute Tox. 4 Inhalation - Aquatic Chronic 3 - Asp. Tox. 1 - Eye Irrit. 2 - Flam. Liq. 3 - Skin Irrit. 2 - STOT RE 2 - STOT RE 2 Inhalation - STOT SE 3

Órgãos-alvo

Central nervous system,Liver,Kidney, hearing organs, Respiratory system

Código de classe de armazenamento

3 - Flammable liquids

Classe de risco de água (WGK)

WGK 2

Ponto de fulgor (°F)

77.0 °F - closed cup

Ponto de fulgor (°C)

25 °C - closed cup

Escolha uma das versões mais recentes:

Certificados de análise (COA)

Lot/Batch Number
SHBS6202
SHBS5493
SDBB1894
SDBB1895
SHBS0682

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Se precisar de uma versão específica, você pode procurar um certificado específico pelo número do lote ou da remessa.

Pesquise por COA

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Magdalena Pasarica et al.
Diabetes, 58(3), 718-725 (2008-12-17)
Based on rodent studies, we examined the hypothesis that increased adipose tissue (AT) mass in obesity without an adequate support of vascularization might lead to hypoxia, macrophage infiltration, and inflammation. Oxygen partial pressure (AT pO2) and AT temperature in abdominal
Transport and isomerization of xylenes over HZSM-5 zeolites.
Mirth G, et al.
J. Catal., 139(1), 24-33 (1993)
A study of nonrigid aromatic molecules by supersonic molecular jet spectroscopy. I. Toluene and the xylenes.
Breen PJ, et al.
J. Chem. Phys. , 87(4), 1917-1926 (1987)
Cheng-Xiong Yang et al.
Analytical chemistry, 83(18), 7144-7150 (2011-08-04)
The diverse structures and pore topologies, accessible cages and tunnels, and high surface areas make metal-organic frameworks attractive as novel media in separation sciences. Here we report the slurry-packed MIL-101(Cr) column for high-performance liquid chromatographic separation of substituted aromatics. The
Jennifer V Littlejohns et al.
Journal of hazardous materials, 175(1-3), 872-882 (2009-12-05)
A dynamic mathematical model has been developed to predict the performance of a stirred tank, solid-liquid two-phase partitioning bioreactor (SL-TPPB) for the treatment of benzene, toluene, ethylbenzene and o-xylene (BTEX) contaminated gases. The SL-TPPB system consists of an aqueous phase
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Questions

1–3 of 3 Questions  

  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

      Helpful?

  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

      Helpful?

  3. What are the dissimilarities between Xylenes ACS (247642) and Xylenes histological grade (534056)?

    1 answer

    1. The term "histological grade" does not have a precise definition; it simply indicates that the intended use for the product is in histology. For a histological grade product, the company selling the product sets the product specifications. In the case of xylene, there is no direct testing performed to ensure the product provides suitable performance in a wide range of histological procedures.

      On the other hand, if a product is sold to ACS specifications, it means that any company selling an ACS grade of chemical must meet the specifications set forth by the American Chemical Society (ACS). Therefore, it should not make a difference as to which company an ACS grade product is sourced from.

      It's possible that a histological grade of xylene may not be suitable for some applications, although it is likely suitable for many applications. However, there is an expectation that an ACS grade xylene should be suitable for use in histological applications, even though ACS does not include a suitability test for use in histology.

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