p-Xylene CAS#106-42-3

CAS Number: 106-42-3
Chemical Formula: C₈H₁₀
Synonyms:

1,4-Xylene
4-Methyltoluene
p-Dimethylbenzene

Appearance: Colorless liquid
HS Code: 29024300
MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)

Contact Now E-Mail Telephone WhatsApp

Product Details

Products Description of p-Xylene CAS#106-42-3

Paraxylene is an important organic chemical raw material, mainly used to produce parabenzoic acid (PTA), dimethyl terephthalate (DMT) and polyethylene terephthalate (PET), and then to produce polyethylene terephthalate (polyester). It can also be used as a solvent and a raw material for the production of medicine, fragrance, ink and other industries. At present, my country has become the world's largest producer and consumer of paraxylene. Originally, paraxylene was extracted from petroleum aromatics obtained from the catalytic reforming of naphtha. Later, with the development of petrochemical and coal coking industries, aromatics conversion became the most direct and effective means of producing paraxylene. In industry, toluene and C9 aromatics are usually used as raw materials to produce paraxylene using processes such as toluene disproportionation and transalkylation, xylene isomerization, toluene-methanol alkylation and adsorption separation.

Parameters

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	n20/D 1.495(lit.)
Fp	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℃
Surface tension	28.11mN/m at 298.15K
CAS DataBase Reference	106-42-3(CAS DataBase Reference)
EPA Substance Registry System	p-Xylene (106-42-3)

Safety Information

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
RIDADR	UN 1307 3/PG 3
OEB	A
OEL	TWA: 100 ppm (435 mg/m3), STEL: 150 ppm (655 mg/m3)
WGK Germany	2
RTECS	ZE2625000
Autoignition Temperature	984 °F
TSCA	Yes
HazardClass	3
PackingGroup	III
HS Code	29024300
Hazardous Substances Data	106-42-3(Hazardous Substances Data)
Toxicity	LD50 orally in Rabbit: 3910 mg/kg