95682

p-Xylene

puriss. p.a., ≥99.0% (GC)

• Sinônimo(s): 1,4-Dimethylbenzene
• Fórmula linear: C₆H₄(CH₃)₂
• Número CAS: 106-42-3
• Peso molecular: 106.17
• Beilstein: 1901563
• Número CE: 203-396-5
• Número MDL: MFCD00008556
• Código UNSPSC: 12352005
• ID de substância PubChem: 329770480

Propriedades

• densidade de vapor: 3.7 (vs air)
• pressão de vapor: 9 mmHg ( 20 °C)
• grau: puriss. p.a.
• Ensaio: ≥99.0% (GC)
• Formulário: liquid
• temperatura de autoignição: 984 °F
• Lim. expl.: 7 %
• técnica(s): GC/GC: suitable
• Impurezas: ≤0.5% o- and m-xylene (GC); ≤0.5% toluene (GC)
• resíduo de evaporação: ≤0.002%
• índice de refração: n20/D 1.495 (lit.); n20/D 1.495
• p.e.: 138 °C (lit.)
• pf: 12-13 °C (lit.)
• solubilidade: water: soluble 0.2 g/L
• densidade: 0.861 g/mL at 20 °C (lit.)
• traços de cátion: 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
• cadeia de caracteres SMILES: Cc1ccc(C)cc1
• InChI: 1S/C8H10/c1-7-3-5-8(2)6-4-7/h3-6H,1-2H3
• chave InChI: URLKBWYHVLBVBO-UHFFFAOYSA-N

Descrição

Descrição geral

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.

Aplicação

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

Informações de segurança

• Pictogramas: GHS02,GHS08,GHS07
• Palavra indicadora: Danger
• Frases de perigo: H226,H304,H312 + H332,H315,H319,H335,H412
• Declarações de precaução: P210 - P273 - P280 - P301 + P310 - P303 + P361 + P353 - P331
• Classificações de perigo: 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
• Órgãos-alvo: Respiratory system
• Código de classe de armazenamento: 3 - Flammable liquids
• Classe de risco de água (WGK): WGK 2
• Ponto de fulgor (°F): 80.6 °F - closed cup
• Ponto de fulgor (°C): 27 °C - closed cup