95682

p-Xylene

puriss. p.a., ≥99.0% (GC)

• Synonyme(s) : 1,4-Dimethylbenzene
• Formule linéaire : C₆H₄(CH₃)₂
• Numéro CAS: 106-42-3
• Poids moléculaire : 106.17
• Beilstein: 1901563
• Numéro CE : 203-396-5
• Numéro MDL: MFCD00008556
• Code UNSPSC : 12352005
• ID de substance PubChem : 329770480

Propriétés

• Densité de vapeur: 3.7 (vs air)
• Niveau de qualité: 200
• Pression de vapeur: 9 mmHg ( 20 °C)
• Qualité: puriss. p.a.
• Essai: ≥99.0% (GC)
• Forme: liquid
• Température d'inflammation spontanée: 984 °F
• Limite d'explosivité: 7 %
• Technique(s): GC/GC: suitable
• Impuretés: ≤0.5% o- and m-xylene (GC); ≤0.5% toluene (GC)
• Résidus d'évap.: ≤0.002%
• Indice de réfraction: n20/D 1.495 (lit.); n20/D 1.495
• pb: 138 °C (lit.)
• Pf: 12-13 °C (lit.)
• Solubilité: water: soluble 0.2 g/L
• Densité: 0.861 g/mL at 20 °C (lit.)
• Traces de cations: 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
• Chaîne SMILES: Cc1ccc(C)cc1
• InChI: 1S/C8H10/c1-7-3-5-8(2)6-4-7/h3-6H,1-2H3
• Clé InChI: URLKBWYHVLBVBO-UHFFFAOYSA-N

Description

Description générale

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.

Informations sur la sécurité

• Pictogrammes: GHS02,GHS08,GHS07
• Mention d'avertissement: Danger
• Mentions de danger: H226,H304,H312 + H332,H315,H319,H335,H412
• Conseils de prudence: P210 - P273 - P280 - P301 + P310 - P303 + P361 + P353 - P331
• Classification des risques: 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
• Organes cibles: Respiratory system
• Code de la classe de stockage: 3 - Flammable liquids
• Classe de danger pour l'eau (WGK): WGK 2
• Point d'éclair (°F): 80.6 °F - closed cup
• Point d'éclair (°C): 27 °C - closed cup