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247642

Sigma-Aldrich

二甲苯

Xylenes

ACS reagent, ≥98.5% xylenes + ethylbenzene basis

别名:

二甲苯异构体混合物

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About This Item

线性分子式:
C6H4(CH3)2
CAS号:
1330-20-7
分子量:
106.17
MDL编号:
MFCD00077264
UNSPSC代码:
12352002
PubChem化学物质编号:
329752747
NACRES:
NA.21
价格与库存信息目前不能提供

等级

ACS reagent

质量水平

200

蒸汽密度

3.7 (vs air)

蒸汽压

18 mmHg ( 37.7 °C)

方案

≥98.5% xylenes + ethylbenzene basis

表单

liquid

组成

C6H5CH2CH3, ≤25%

expl. lim.

7 %

dilution

(for analytical testing)

杂质

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

蒸发残留物

≤0.002%

颜色

APHA: ≤10

折射率

n20/D 1.497 (lit.)

沸点

137-140 °C (lit.)

mp

-34 °C

密度

0.86 g/mL at 25 °C (lit.)

SMILES字符串

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

InChI key

MVZVDAGWAAZJPE-UHFFFAOYSA-N

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相关类别

一般描述

二甲苯是二甲苯的邻、间和对异构体的混合物，二甲苯是一种芳香烃，广泛用作各种化学反应的溶剂。

应用

二甲苯可作为溶剂用于：
  • 在四膦/钯催化下，与位阻芳基卤化物和芳基硼酸进行Suzuki交叉偶联，合成三邻位取代联芳基加合物。
  • 用于胺或氨与醇的 N-烷基化反应，以合成 N-烷基胺。
  • 以不对称磷酸二胺和二酐为原料，采用溶液聚合法制备芳香族聚酰亚胺。

包装

以聚乙烯涂层瓶包装出售：产品编号247642-1L-CB、247642-4L-CB和247642-4X4L-CB

警示用语：

Danger

危险分类

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

靶器官

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

储存分类代码

3 - Flammable liquids

WGK

WGK 2

闪点(°F)

77.0 °F - closed cup

闪点(°C)

25 °C - closed cup

历史批次信息供参考:

分析证书(COA)

Lot/Batch Number
SHBS6202
SHBS5493
SDBB1894
SDBB1895
SDBB1201

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其他客户在看

Slide 1 of 2

1 of 2

间二甲苯 analytical standard

Supelco

95670

间二甲苯

α-松油烯 ≥95.0% (GC)

Sigma-Aldrich

86473

α-松油烯

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
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)
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
Lian He et al.
Journal of environmental sciences (China), 23(1), 160-165 (2011-04-12)
The activities of CeO2 nanocubes calcined at different temperatures were tested for catalytic oxidation of o-xylene. Using CeO2 nanocubes as catalysts, complete catalytic oxidation of o-xylene was achieved below 210 degrees C. The CeO2 nanomaterials were characterized by means of
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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

      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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