Additional Standards,
Analytical Reagents,
Analytical Reagents for General Use,
Analytical Standards,
Analytical/Chromatography,
Aromatics,
Carthamus tinctorius (Safflower oil),
Cell Biology,
Chemical Class,
Nutrition Research,
Phytochemicals by Plant (Food/Spice/Herb),
Puriss p.a.,
T-Z, Puriss p.a.
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vapor density
3.7 (vs air)
vapor pressure
9 mmHg ( 20 °C)
InChI Key
URLKBWYHVLBVBO-UHFFFAOYSA-N
grade
puriss. p.a.
assay
≥99.0% (GC)
autoignition temp.
984 °F
expl. lim.
7 %
impurities
≤0.5% o- and m-xylene (GC)
≤0.5% toluene (GC)
evapn. residue
≤0.002%
refractive index
n20/D 1.495(lit.)
n20/D 1.495
bp
138 °C(lit.)
mp
12-13 °C(lit.)
solubility
water: soluble 0.2 g/L
density
0.861 g/mL at 20 °C(lit.)
cation traces
Al: ≤0.5 mg/kg
Ba: ≤0.1 mg/kg
Bi: ≤0.1 mg/kg
Ca: ≤0.5 mg/kg
Cd: ≤0.05 mg/kg
Co: ≤0.02 mg/kg
Cr: ≤0.02 mg/kg
Cu: ≤0.02 mg/kg
Fe: ≤0.1 mg/kg
K: ≤0.5 mg/kg
Li: ≤0.1 mg/kg
Mg: ≤0.1 mg/kg
Mn: ≤0.02 mg/kg
Mo: ≤0.1 mg/kg
Na: ≤0.5 mg/kg
Ni: ≤0.02 mg/kg
Pb: ≤0.1 mg/kg
Sr: ≤0.1 mg/kg
Zn: ≤0.1 mg/kg
Description:
Application
p-Xylene may be used in the synthesis of poly-p-xylene and terephthalic acid.
General description
p-Xylene is an isomeric form of xylene. It undergoes Friedel-Crafts acylation reaction with various acids in the presence of zeolites (catalyst). It can be obtained from the mixtures of isomeric forms of xylene and ethylbenzene, isolated from the naptha fraction of petroleum. Also, it can be prepared from toluene by employing ZSM (Zeolite Socony Mobil)-5 catalysts. It is a raw material for the manufacture of PET (poly(ethylene terephthalate)) bottles. Sustainable synthesis of xylene from ethylene and dimethylfuran in the presence of zeolite catalysts has been reported.