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247642

Sigma-Aldrich

Xylenes

Xylenes

ACS reagent, ≥98.5% xylenes + ethylbenzene basis

Synonyme(s) :

Xylene mixture of isomers

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About This Item

Formule linéaire :
C6H4(CH3)2
Numéro CAS:
1330-20-7
Poids moléculaire :
106.17
Numéro MDL:
MFCD00077264
Code UNSPSC :
12352002
ID de substance PubChem :
329752747
Nomenclature NACRES :
NA.21
Qualité:
ACS reagent
Essai:
≥98.5% xylenes + ethylbenzene basis
pb:
137-140 °C (lit.)
Pression de vapeur:
18 mmHg ( 37.7 °C)
Le tarif et la disponibilité ne sont pas disponibles actuellement.

Qualité

ACS reagent

Niveau de qualité

200

Densité de vapeur

3.7 (vs air)

Pression de vapeur

18 mmHg ( 37.7 °C)

Essai

≥98.5% xylenes + ethylbenzene basis

Forme

liquid

Composition

C6H5CH2CH3, ≤25%

Limite d'explosivité

7 %

Impuretés

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

Résidus d'évap.

≤0.002%

Couleur

APHA: ≤10

Indice de réfraction

n20/D 1.497 (lit.)

pb

137-140 °C (lit.)

Pf

-34 °C

Densité

0.86 g/mL at 25 °C (lit.)

Chaîne 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

Clé InChI

MVZVDAGWAAZJPE-UHFFFAOYSA-N

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Catégories apparentées

Description générale

Xylenes is a mixture of isomeric ortho-,meta- and para- forms of xylene which is an aromatic hydrocarbon widelyused as a solvent in various chemical reactions.

Application

Xylenes can be used as a solvent:
  • In the tetraphosphine/palladium-catalyzed Suzuki cross-coupling with sterically hindered aryl halides and arylboronic acids to synthesize tri-ortho-substituted biaryl adducts.
  • For the N-alkylation of amines or ammonia with alcohols to synthesize N-alkyl amines.
  • To synthesize aromatic polyimides by reacting unsymmetric phosphinated diamines and dianhydrides via solution polymerization.

Conditionnement

poly-coated bottles available: product numbers 247642-1L-CB, 247642-4L-CB and 247642-4X4L-CB

Pictogrammes

FlameHealth hazardExclamation mark
GHS02,GHS08,GHS07

Mention d'avertissement

Danger

Classification des risques

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

Organes cibles

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

Code de la classe de stockage

3 - Flammable liquids

Classe de danger pour l'eau (WGK)

WGK 2

Point d'éclair (°F)

77.0 °F - closed cup

Point d'éclair (°C)

25 °C - closed cup

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Certificats d'analyse (COA)

Lot/Batch Number
SHBS5493
SDBB1894
SDBB1895
SDBB1201
SHBS0682

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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)
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
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Microbes bound to a wheat bran/red wood powder/diatomaceous earth carrier were used as inoculants for a biotrickling filter (BTF) for treating gases contaminated with a mixture of benzene, toluene, and o-xylene (BTo-X). An overall removal efficiency of more than 87.9%
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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

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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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  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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