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8.08697

o-Xylene

for synthesis

Synonym(s):

1,2-Dimethylbenzene

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About This Item

Linear Formula:
C6H4(CH3)2
CAS Number:
95-47-6
Molecular Weight:
106.17
UNSPSC Code:
12352005
NACRES:
NA.22
EC Index Number:
202-422-2
MDL number:
MFCD00008519
Beilstein/REAXYS Number:
1815558
Assay:
≥98% (GC)
Grade:
synthesis grade
Bp:
143-145 °C (lit.)
Vapor pressure:
<0.1 atm ( 21.1 °C), 16 mmHg ( 37.7 °C), 7 mmHg ( 20 °C)
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grade

synthesis grade

Quality Segment

vapor density

3.7 (vs air)

vapor pressure

<0.1 atm ( 21.1 °C), 16 mmHg ( 37.7 °C), 7 mmHg ( 20 °C)

assay

≥98% (GC)

form

liquid

autoignition temp.

867 °F

expl. lim.

7 %

dilution

(for synthesis)

refractive index

n20/D 1.505 (lit.)

bp

143-145 °C (lit.)

mp

-26--23 °C (lit.)

transition temp

flash point 30 °C

density

0.879 g/mL at 20 °C (lit.)

storage temp.

2-30°C

SMILES string

Cc1ccccc1C

InChI

1S/C8H10/c1-7-5-3-4-6-8(7)2/h3-6H,1-2H3

InChI key

CTQNGGLPUBDAKN-UHFFFAOYSA-N

General description

O-Xyleneis an aromatic hydrocarbon composed of two methyl substituents attached to adjacent carbon atoms. It has extremely low solubility in water. It is used to produce plasticizers, dyes, and pigments. Petroleum cracking produces O-Xylenes, which are used to generate phthalic anhydride, a precursor to many products, drugs, and chemicals.

Application

O-Xylene is used:
  • As an additive of dope solutions in the preparation of PES (polyethersulfone) hollow fiber membranes.
  • To produce phthalic anhydride.

Analysis Note

Assay (GC, area%): ≥ 98.0 % (a/a)
Density (d 20 °C/ 4 °C): 0.878 - 0.881
Identity (IR): passes test

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Signal Word

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 SE 3

Target Organs

Respiratory system

Storage Class

3 - Flammable liquids

WGK

WGK 2

Flash Point (°F)

89.6 °F - closed cup

Flash Point (°C)

32.0 °C - closed cup

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