p-Xylene
SIGALD/95682 - puriss. p.a., ≥99.0% (GC)
Synonym: 1,4-Dimethylbenzene
CAS Number: 106-42-3
Empirical Formula (Hill Notation): C8H10
Molecular Weight: 106.17
EC Number: 203-396-5
MDL Number: MFCD00008556
Linear Formula: C6H4(CH3)2
Product Type: Chemical
| assay | ≥99.0% (GC) |
| autoignition temp. | 984 °F |
| bp | 138 °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 | |
| density | 0.861 g/mL at 20 °C (lit.) |
| evapn. residue | ≤0.002% |
| expl. lim. | 7 % |
| form | liquid |
| grade | puriss. p.a. |
| impurities | ≤0.5% o- and m-xylene (GC) |
| ≤0.5% toluene (GC) | |
| InChI | 1S/C8H10/c1-7-3-5-8(2)6-4 |
| InChI key | URLKBWYHVLBVBO-UHFFFAOYSA |
| mp | 12-13 °C (lit.) |
| Quality Level | 200  |
| refractive index | n |
| n |
|
| SMILES string | Cc1ccc(C)cc1 |
| solubility | water: soluble 0.2 g/L |
| vapor density | 3.7 (vs air) |
| vapor pressure | 9 mmHg ( 20 °C) |
| 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. |
| Symbol |    GHS02,GHS07,GHS08 |
| Signal word | Danger |
| Hazard statements | H226 - H304 - H312 + H332 - H315 - H319 - H335 - H412 |
| Precautionary statements | P210 - P273 - P280 - P301 + P310 - P303 + P361 + P353 - P331 |
| Hazard Codes | Xn |
| Risk Statements | 10-20/21-38 |
| Safety Statements | 25 |
| RIDADR | UN1307 - class 3 - PG 3 - Xylenes |
| WGK Germany | WGK 2 |
| Flash Point(F) | 80.6 °F - closed cup |
| Flash Point(C) | 27 °C - closed cup |
| Purity | ≥99.0% (GC) |
| bp | 138 °C (lit.) |
| mp | 12-13 °C (lit.) |
| Density | 0.861 g/mL at 20 °C (lit.) |
| Refractive Index | n |
| UNSPSC | 12352005 |