P-XYLENE

1,4-Dimethylbenzene

Para-Xylene

106-42-3

1,4-Xylene

p-Methyltoluene

p-Dimethylbenzene

p-Xylol

Benzene, 1,4-dimethyl-

4-Xylene

4-Methyltoluene

Chromar

Scintillar

1,4-Dimethylbenzol

paraxylene

CCRIS 910

NSC 72419

HSDB 136

EINECS 203-396-5

UNII-6WAC1O477V

6WAC1O477V

DTXSID2021868

CHEBI:27417

AI3-52255

NSC-72419

68650-36-2

CHEMBL31561

p-Xylene-alpha,alpha'-13C2

DTXCID701868

EC 203-396-5

MFCD00008556

Xylene, p-

Benzene, p-dimethyl-

p-Xylenes

Xylene, p-isomer

PXY

p-Xylol (DOT)

1,4-dimethyl benzene

1,4-dimethyl-benzene

P-XYLENE [MI]

4-XYLENE [HSDB]

bmse000834

p-Xylene, analytical standard

BENZENE,1,4-DIMETHYL

WLN: 1R D1

p-Xylene, anhydrous, >=99%

p-Xylene, for synthesis, 99%

DTXSID90178045

187l

p-Xylene, for HPLC, >=99%

p-Xylene, ReagentPlus(R), 99%

NSC72419

p-Xylene 10 microg/mL in Methanol

Tox21_201113

BDBM50008567

Benzene, 1,2(or 1,4)-dimethyl-

c0083

STL264212

AKOS000121124

MCULE-3769448716

p-Xylene 5000 microg/mL in Methanol

p-Xylene, purum, >=98.0% (GC)

NCGC00091661-01

NCGC00091661-02

NCGC00258665-01

68411-39-2

CAS-106-42-3

p-Xylene, SAJ first grade, >=99.0%

p-Xylene [UN1307] [Flammable liquid]

p-Xylene, SAJ special grade, >=99.0%

NS00001217

S0649

X0014

X0044

EN300-24549

p-Xylene, puriss. p.a., >=99.0% (GC)

C06756

J-001588

J-524068

Q3314420

F0001-0120

Z199056432

InChI=1/C8H10/c1-7-3-5-8(2)6-4-7/h3-6H,1-2H

p-Xylene, Pharmaceutical Secondary Standard; Certified Reference Material

136777-61-2

25951-90-0

The Henry's Law constant for 4-xylene is measured as 6.90X10-3 atm-cu m/mole(1). This Henry's Law constant indicates that 4-xylene is expected to volatilize rapidly from water surfaces(2). Based on this Henry's Law constant, the volatilization half-life from a model river (1 m deep, flowing 1 m/sec, wind velocity of 3 m/sec)(2) is estimated as 3.1 hours(SRC). The volatilization half-life from a model lake (1 m deep, flowing 0.05 m/sec, wind velocity of 0.5 m/sec)(2) is estimated as 4.1 days(SRC). 4-Xylene's Henry's Law constant indicates that volatilization from moist soil surfaces may occur(SRC). 4-Xylene is expected to volatilize from dry soil surfaces(SRC) based upon a vapor pressure of 8.84 mm Hg(3).
Literature: (1) Foster P et al; Fresen Environ Bull 3: 318-323 (1994) (2) Lyman WJ et al; Handbook of Chemical Property Estimation Methods. Washington, DC: Amer Chem Soc pp. 15-1 to 15-29 (1990) (3) Chao J et al; J Phys Chem Ref Data 12: 1033-63 (1983)

Koc values of 246 and 540 have been measured for 4-xylene in silt and sandy loam soils respectively(1). A Koc value of 204 was measured for 4-xylene using sandy aquifer materials(2). A median experimental Koc value of 295 has also been reported(3). According to a classification scheme(4), these Koc values suggest that 4-xylene is expected to have moderate to low mobility in soil. A soil leaching column study estimated a 4-xylene Koc of 331 using a chromatographic methodology(5). Another soil column leaching study estimated a Koc range of 118-298 based on HPLC measurement(6).
Literature: (1) Walton BT et al; J Environ Qual 21: 552-558 (1992) (2) Abdul AS et al; Hazard Waste & Hazard Mater 4: 211-22 (1987) (3) Schuurmann G et al; Environ Sci Technol 40: 7005-7011 (Supporting information) (2006) (4) Swann RL et al; Res Rev 85: 17-28 (1983) (5) Xu F et al; J Environ Qual 30: 1618-1623 (2001) (6) ECHA; Search for Chemicals. p-Xylene (CAS 106-42-3) Registered Substances Dossier. European Chemical Agency; Available from, as of June 27, 2016: http://echa.europa.eu/