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:
Molecular Weight:
106.17
UNSPSC Code:
12352005
NACRES:
NA.22
EC Index Number:
202-422-2
MDL number:
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)
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
Density (d 20 °C/ 4 °C): 0.878 - 0.881
Identity (IR): passes test
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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 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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