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Merck
CN

33817

二甲苯

puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur.

别名:

二甲苯异构体混合物

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关于此项目

线性分子式:
C6H4(CH3)2
化学文摘社编号:
1330-20-7
分子量:
106.17
UNSPSC Code:
12352002
PubChem Substance ID:
329754659
EC Number:
215-535-7
MDL number:
MFCD00077264
Assay:
≥98.50%
Bp:
137-140 °C (lit.)
Vapor pressure:
18 mmHg ( 37.7 °C)

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InChI key

MVZVDAGWAAZJPE-UHFFFAOYSA-N

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

SMILES string

Cc1ccc(C)cc1.Cc2cccc(C)c2.Cc3ccccc3C

grade

ACS reagent, puriss. p.a.

agency

USP/NF, reag. ISO, reag. Ph. Eur.

vapor density

3.7 (vs air)

vapor pressure

18 mmHg ( 37.7 °C)

assay

≥98.50%

form

liquid

expl. lim.

7 %

dilution

(for analytical testing)

impurities

≤0.0001% thiophene, ≤0.0005% free acid (as HCl), ≤0.0005% free alkali (as NaOH), ≤0.001% non-volatile matter, ≤0.003% S-compounds (as S), ≤0.05% water (Karl Fischer), ≤0.1% benzene (GC), ≤0.1% toluene, ≤4% ethylbenzene, ≥96% total isomers (GC)

bp

137-140 °C (lit.)

mp

-34 °C

density

0.86 g/mL at 25 °C (lit.)

cation traces

Al: ≤0.5 mg/kg, B: ≤0.02 mg/kg, Ba: ≤0.1 mg/kg, Ca: ≤0.5 mg/kg, Cd: ≤0.02 mg/kg, Co: ≤0.02 mg/kg, Cr: ≤0.02 mg/kg, Cu: ≤0.02 mg/kg, Fe: ≤0.1 mg/kg, Mg: ≤0.1 mg/kg, Mn: ≤0.02 mg/kg, Ni: ≤0.02 mg/kg, Pb: ≤0.1 mg/kg, Sn: ≤0.1 mg/kg, Zn: ≤0.1 mg/kg

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General description

The product (Xylenes) is the mixture of isomeric ortho-, meta- and para-forms of xylene. Its dispersed emission and time of flight mass spectra have 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. Time-resolved in situ FTIR spectroscopic and gas chromatographic studies have been carried out to study its diffusion coefficients, adsorption rates and isomerization efficacy over HSZM-5 zeolite surfaces.

Other Notes

Pertains only in Germany: unversteuert

signalword

Danger

Hazard Classifications

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

target_organs

Central nervous system,Liver,Kidney, Respiratory system

存储类别

3 - Flammable liquids

wgk

WGK 2

flash_point_f

77.0 °F - closed cup

flash_point_c

25 °C - closed cup

法规信息

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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
Cheng-Xiong Yang et al.
Analytical chemistry, 83(18), 7144-7150 (2011-08-04)
The diverse structures and pore topologies, accessible cages and tunnels, and high surface areas make metal-organic frameworks attractive as novel media in separation sciences. Here we report the slurry-packed MIL-101(Cr) column for high-performance liquid chromatographic separation of substituted aromatics. The
Jennifer V Littlejohns et al.
Journal of hazardous materials, 175(1-3), 872-882 (2009-12-05)
A dynamic mathematical model has been developed to predict the performance of a stirred tank, solid-liquid two-phase partitioning bioreactor (SL-TPPB) for the treatment of benzene, toluene, ethylbenzene and o-xylene (BTEX) contaminated gases. The SL-TPPB system consists of an aqueous phase
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