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重要文件

247642

Sigma-Aldrich

二甲苯

Xylenes

ACS reagent, ≥98.5% xylenes + ethylbenzene basis

同義詞:

二甲苯异构体混合物

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About This Item

線性公式:
C6H4(CH3)2
CAS號碼:
分子量::
106.17
MDL號碼:
分類程式碼代碼:
12352002
PubChem物質ID:
NACRES:
NA.21
bp:
137-140 °C (lit.)
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等級

ACS reagent

品質等級

蒸汽密度

3.7 (vs air)

蒸汽壓力

18 mmHg ( 37.7 °C)

化驗

≥98.5% xylenes + ethylbenzene basis

形狀

liquid

成份

C6H5CH2CH3, ≤25%

expl. lim.

7 %

dilution

(for analytical testing)

雜質

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

蒸發殘留物

≤0.002%

顏色

APHA: ≤10

折射率

n20/D 1.497 (lit.)

bp

137-140 °C (lit.)

mp

-34 °C

密度

0.86 g/mL at 25 °C (lit.)

SMILES 字串

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 密鑰

MVZVDAGWAAZJPE-UHFFFAOYSA-N

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一般說明

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。

應用

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。

包裝

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

訊號詞

Danger

危險分類

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

標靶器官

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

儲存類別代碼

3 - Flammable liquids

水污染物質分類(WGK)

WGK 2

閃點(°F)

77.0 °F - closed cup

閃點(°C)

25 °C - closed cup


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分析證明 (COA)

Lot/Batch Number

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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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