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Sigma-Aldrich

Xylenes

reagent grade

Synonim(y):

Xylene mixture of isomers

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1 L
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236,00 zł

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236,00 zł

About This Item

Wzór liniowy:
C6H4(CH3)2
Numer CAS:
1330-20-7
Masa cząsteczkowa:
106.17
Numer WE:
215-535-7
Numer MDL:
MFCD00077264
Kod UNSPSC:
12352002
Identyfikator substancji w PubChem:
329752157
NACRES:
NA.21
bp:
137-140 °C (lit.)

236,00 zł

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klasa czystości

reagent grade

Poziom jakości

100

gęstość pary

3.7 (vs air)

ciśnienie pary

18 mmHg ( 37.7 °C)

Próba

≥75.0% (xylenes isomers)

Formularz

liquid

temp. samozapłonu

867 °F

granice wybuchowości

7 %

dilution

(for analytical testing)

zanieczyszczenia

≤25% ethylbenzene

współczynnik refrakcji

n20/D 1.497 (lit.)

bp

137-140 °C (lit.)

mp

-34 °C (lit.)

gęstość

0.86 g/mL at 25 °C (lit.)

ciąg 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

Klucz InChI

MVZVDAGWAAZJPE-UHFFFAOYSA-N

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Opis ogólny

Xylenes is the mixture of isomeric ortho-, meta- and para-forms of xylene. Its dispersed emission and time of flight mass spectra has been reported. Transitions from S1 ↔ S0 states have been found to be within the range of 100cm-1 and were reported to be arising due to the internal rotation of ring methyl groups.[1] Time-resolvedin situ FTIR spectroscopic and gas chromatographic studies have been carried out to study its diffusion coefficients, adsorption rates and isomerization efficacy over HSZM-5 surfaces.[2]

Zastosowanie

Xylenes may be employed in chloramphenicol acetyltransferase (CAT) assay to evaluate the CAT gene expression.[3]
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Zastosowanie

Numer produktu
Opis
Cennik

Hasło ostrzegawcze

Danger

Zwroty wskazujące rodzaj zagrożenia

H226,H304,H312 + H332,H315,H319,H335,H373,H412

Zwroty wskazujące środki ostrożności

P210 - P273 - P280 - P301 + P310 - P303 + P361 + P353 - P331

Klasyfikacja zagrożeń

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 Inhalation - STOT SE 3

Organy docelowe

Central nervous system,Liver,Kidney, Respiratory system

Kod klasy składowania

3 - Flammable liquids

Klasa zagrożenia wodnego (WGK)

WGK 2

Temperatura zapłonu (°F)

77.0 °F - closed cup

Temperatura zapłonu (°C)

25 °C - closed cup

Wybierz jedną z najnowszych wersji:

Certyfikaty analizy (CoA)

Lot/Batch Number
SHBS7319
SHBS4540
SHBR8748
SHBS2114
SHBR5732

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Dokumenty związane z niedawno zakupionymi produktami zostały zamieszczone w Bibliotece dokumentów.

Odwiedź Bibliotekę dokumentów

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)
K J Li et al.
Proceedings of the National Academy of Sciences of the United States of America, 95(7), 3650-3654 (1998-05-09)
Efficient and controllable expression of a transgene usually requires the presence of intron sequences and much efforts have been made to produce retrovirus vectors that can transduce and integrate genes with introns. However, this has proven difficult because the viral
Anne-France le Rolle et al.
Journal of translational medicine, 13, 199-199 (2015-06-25)
Clinical therapy for metastatic colorectal cancer (CRC) remains limited, especially when the tumor harbors a KRAS mutation. This study aimed to identify prognostic biomarkers in CRC that are accessible for therapeutic inhibition. Conditioned media from human CRC epithelial cells and
Ryan P Smith et al.
Human gene therapy, 26(6), 377-385 (2015-03-27)
Much research has gone into the development of hybrid gene delivery systems that combine the broad tropism and efficient transduction of adenoviral vectors with the ability to achieve stable expression of cargo genes. In addition to gene therapy applications, such
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Chromatograms

application for HPLC

Questions

1–4 of 4 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. hello we would like to enquire if this grade of xylene (CAS 1330-20-7) is equivelant to the grade BS 458:1963

    1 answer

    1. This product is not BS 458:1963 grade. Currently, British Standard grade products are not available.

      Helpful?

  4. Does Xylenes have a shelf life

    1 answer

    1. This product is not assigned an expiration date or recommended retest date. Products with no expiration date or recommended retest date should be routinely inspected by customers to ensure they perform as expected. These products are also subject to a one year warranty from the date of shipment. For more information you may access the "Product Dating Information" document under "ADDITIONAL USEFUL DOCUMENTS ABOUT OUR PRODUCTS" at the bottom of the Quality Services page with this link: https://www.sigmaaldrich.com/life-science/quality-and-regulatory-management/quality-services.

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