A8434012
p-Xylene , ≥99.0%(GC) , 106-42-3
Synonym(s):
p-Xylene;1;1,4-Dimethylbenzene;Dimethylbenzol;p-Xylene
CAS NO.：106-42-3
Empirical Formula: C8H10
Molecular Weight: 106.17
MDL number: MFCD00008556
EINECS: 203-396-5
Update time: 2022-07-08
PRODUCT Properties
| Melting point: | 12-13 °C (lit.) |
| Boiling point: | 138 °C (lit.) |
| Density | 0.861 g/mL at 20 °C (lit.) |
| vapor density | 3.7 (vs air) |
| vapor pressure | 9 mm Hg ( 20 °C) |
| refractive index | n |
| Flash point: | 77 °F |
| storage temp. | Store at +5°C to +30°C. |
| solubility | water: soluble0.2g/L |
| form | Liquid |
| pka | >15 (Christensen et al., 1975) |
| color | Colorless |
| Relative polarity | 0.074 |
| Odor | Like benzene; characteristic aromatic. |
| Odor Threshold | 0.058ppm |
| explosive limit | 1.1-7%(V) |
| Water Solubility | Miscible with alcohol, ether, acetone, benzene and chloroform. Immiscible with water. |
| λmax | λ: 294 nm Amax: 1.00 λ: 320 nm Amax: 0.10 λ: 350 nm Amax: 0.05 λ: 380-400 nm Amax: 0.01 |
| Merck | 14,10081 |
| BRN | 1901563 |
| Henry's Law Constant | 16.1 at 45.00 °C, 18.6 at 50.00 °C, 20.3 at 55.00 °C, 23.4 at 60.00 °C, 30.5 at 70.00 °C (static
headspace-GC, Park et al., 2004) |
| Exposure limits | TLV-TWA100 ppm (～434 mg/m3) (ACGIH,
MSHA, and OSHA); STEL 150 ppm
(～651 mg/m3) (ACGIH); ceiling 200 ppm/
10 min (NIOSH); IDLH 1000 ppm (NIOSH). |
| Dielectric constant | 2.6（20℃） |
| Stability: | Stable. Incompatible with oxidizing agents. Hygroscopic. Flammable. |
| InChIKey | URLKBWYHVLBVBO-UHFFFAOYSA-N |
| LogP | 3.16 at 20℃ |
Description and Uses
p-Xylene is used as a precursor in the production of benzoic, isophthalic, tetraphillic acids and dimethyle esters, which are used in the manufacture of polyester. It acts as an intermediate in plastic and rubber products.
Safety
| Symbol(GHS) |    GHS02,GHS07,GHS08 |
| Signal word | Danger |
| Hazard statements | H226-H304-H312+H332-H315-H335-H412 |
| Precautionary statements | P210-P273-P280-P301+P310-P303+P361+P353-P331 |
| Hazard Codes | Xn,T,F |
| Risk Statements | 10-20/21-38-39/23/24/25-23/24/25-11 |
| Safety Statements | 25-45-36/37-16-7 |
| OEB | A |
| OEL | TWA: 100 ppm (435 mg/m3), STEL: 150 ppm (655 mg/m3) |
| RIDADR | UN 1307 3/PG 3 |
| WGK Germany | 2 |
| RTECS | ZE2625000 |
| Autoignition Temperature | 984 °F |
| TSCA | Yes |
| HazardClass | 3 |
| PackingGroup | III |
| HS Code | 29024300 |
| Toxicity | LD50 orally in Rabbit: 3910 mg/kg |
