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247642

Sigma-Aldrich

Xylole

Xylenes

ACS reagent, ≥98.5% xylenes + ethylbenzene basis

Synonym(e):

Xylol

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About This Item

Lineare Formel:
C6H4(CH3)2
CAS-Nummer:
1330-20-7
Molekulargewicht:
106.17
MDL-Nummer:
MFCD00077264
UNSPSC-Code:
12352002
PubChem Substanz-ID:
329752747
NACRES:
NA.21
bp:
137-140 °C (lit.)
Preise und Verfügbarkeit sind derzeit nicht verfügbar.

Qualität

ACS reagent

Qualitätsniveau

200

Dampfdichte

3.7 (vs air)

Dampfdruck

18 mmHg ( 37.7 °C)

Assay

≥98.5% xylenes + ethylbenzene basis

Form

liquid

Zusammensetzung

C6H5CH2CH3, ≤25%

Expl.-Gr.

7 %

dilution

(for analytical testing)

Verunreinigungen

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

Abdampfrückstand

≤0.002%

Farbe

APHA: ≤10

Brechungsindex

n20/D 1.497 (lit.)

bp

137-140 °C (lit.)

mp (Schmelzpunkt)

-34 °C

Dichte

0.86 g/mL at 25 °C (lit.)

SMILES String

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

InChIKey

MVZVDAGWAAZJPE-UHFFFAOYSA-N

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Verwandte Kategorien

Allgemeine Beschreibung

Xylole sind eine Mischung aus isomeren ortho-,meta- und para-Formen von Xylol, das ein aromatischer Kohlenwasserstoff ist, der weit verbreitetals Lösungsmittel in verschiedenen chemischen Reaktionen verwendet wird.

Anwendung

Xylole können wie folgt als Lösungsmittel verwendet werden:
  • Bei der Tetraphosphan/Palladium-katalysierten Suzuki-Kreuzkupplung mit sterisch gehinderten Arylhalogeniden und Arylboronsäure zur Synthese von tri-ortho-substituierten Biaryladdukten.
  • Für die N-Alkylierung von Aminen oder Ammoniak mit Alkoholen zur Synthese von N-Alkyl-Aminen.
  • Zur Synthese von aromatischen Polyimiden durch die Reaktion unsymmetrischer phosphatierter Diamine und Dianhydride über Lösungspolymerisation.

Verpackung

polybeschichtete Flaschen erhältlich: Produktnummern 247642-1L-CB, 247642-4L-CB und 247642-4X4L-CB

Signalwort

Danger

Gefahreneinstufungen

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

Zielorgane

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

Lagerklassenschlüssel

3 - Flammable liquids

WGK

WGK 2

Flammpunkt (°F)

77.0 °F - closed cup

Flammpunkt (°C)

25 °C - closed cup

Hier finden Sie alle aktuellen Versionen:

Analysenzertifikate (COA)

Lot/Batch Number
SHBS6202
SHBS5493
SDBB1894
SDBB1895
SDBB1201

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α-Terpinen ≥95.0% (GC)

Sigma-Aldrich

86473

α-Terpinen

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)
Transport and isomerization of xylenes over HZSM-5 zeolites.
Mirth G, et al.
J. Catal., 139(1), 24-33 (1993)
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
Qiming Wang et al.
Nature communications, 5, 4899-4899 (2014-09-17)
Cephalopods can display dazzling patterns of colours by selectively contracting muscles to reversibly activate chromatophores--pigment-containing cells under their skins. Inspired by this novel colouring strategy found in nature, we design an electro-mechano-chemically responsive elastomer system that can exhibit a wide
Sailendra Nath Sarma et al.
Toxicology, 271(3), 122-130 (2010-04-03)
Benzene, toluene, o-xylene, ethylbenzene, trichloroethylene and dichloromethane are the most widely used volatile organic compounds (VOCs), and their toxic mechanisms are still undefined. This study analyzed the genome-wide expression profiles of human promyelocytic leukemia HL-60 cells exposed to VOCs using
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Fragen

1-3 von 3 Fragen  

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

    1 Antwort

    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

      Hilfreich?

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

    1 Antwort

    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

      Hilfreich?

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

    1 Antwort

    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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