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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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产品名称

二甲苯, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur.

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)

refractive index

n20/D 1.497 (lit.)

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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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
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
Jian M Chen et al.
Bioresource technology, 101(21), 8067-8073 (2010-06-26)
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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