95682

p-Xylene

puriss. p.a., ≥99.0% (GC)

• Synonim(y): 1,4-Dimethylbenzene
• Wzór liniowy: C₆H₄(CH₃)₂
• Numer CAS: 106-42-3
• Masa cząsteczkowa: 106.17
• EC Number: 203-396-5
• UNSPSC Code: 12352005
• PubChem Substance ID: 329770480
• Beilstein/REAXYS Number: 1901563
• MDL number: MFCD00008556
• Assay: ≥99.0% (GC)
• Technique(s): GC/GC: suitable
• Bp: 138 °C (lit.)
• Vapor pressure: 9 mmHg ( 20 °C)

Właściwości

• vapor density: 3.7 (vs air)
• vapor pressure: 9 mmHg ( 20 °C)
• grade: puriss. p.a.
• assay: ≥99.0% (GC)
• form: liquid
• autoignition temp.: 984 °F
• expl. lim.: 7 %
• technique(s): GC/GC: suitable
• impurities: ≤0.5% o- and m-xylene (GC), ≤0.5% toluene (GC)
• evapn. residue: ≤0.002%
• refractive index: 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
• SMILES string: Cc1ccc(C)cc1
• InChI: 1S/C8H10/c1-7-3-5-8(2)6-4-7/h3-6H,1-2H3
• InChI key: URLKBWYHVLBVBO-UHFFFAOYSA-N

Opis

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.

Application

p-Xylene may be used in the synthesis of poly-p-xylene and terephthalic acid.

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Informacja o środkach bezpieczeństwa

• Słowo ostrzegawcze: Danger
• Piktogramy: GHS02,GHS08,GHS07
• Kody zagrożeń: H226,H304,H312 + H332,H315,H319,H335,H412
• Ostrzeżenia: P210 - P273 - P280 - P301 + P310 - P303 + P361 + P353 - P331
• 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
• Narządy docelowe: Respiratory system
• Klasa składowania: 3 - Flammable liquids
• Co się dzieje?: WGK 2
• Temperatura zapłonu (°F): 80.6 °F - closed cup
• Temperatura zapłonu (°C): 27 °C - closed cup