Home Categories Organic Chemistry Xylene
A8436712

Xylene , AR, 99%(diopenne -like structure+athylene) , 1330-20-7

Synonym(s):
Xylenes in dimethyl sulfoxide;Xylenes solution

CAS NO.:1330-20-7

Empirical Formula: C8H10

Molecular Weight: 106.17

MDL number: MFCD00077264

EINECS: 215-535-7

Update time: 2022-07-08

PRODUCT Properties

Melting point: -34 °C
Boiling point: 137-140 °C (lit.)
Density  0.86 g/mL at 25 °C (lit.)
vapor density  3.7 (vs air)
vapor pressure  18 mm Hg ( 37.7 °C)
refractive index  n20/D 1.497(lit.)
Flash point: 77 °F(lit.)
storage temp.  Flammables area
solubility  Chloroform (Soluble), Methanol (Slightly)
form  Liquid
color  APHA: ≤10
Odor char. sweet odor
explosive limit 7%
Water Solubility  <0.1 g/L (20 ºC)
Merck  14,10081
BRN  1901563
Exposure limits ACGIH: TWA 100 ppm; STEL 150 ppm
OSHA: TWA 100 ppm(435 mg/m3)
Dielectric constant 10.0(Ambient)
Stability: Volatile, flammable and its vapors form explosive mixtures with air at room temperature.
InChIKey KAKOUNRRKSHVJO-UHFFFAOYSA-N
LogP 3.16 at 20℃

Description and Uses

Xylene is used as a solvent. In this application, the mixture of isomers is often referred to as xylenes or xylol. Solvent xylene often contains a small percentage of ethylbenzene. Like the individual isomers, the mixture is colourless, sweet smelling, and highly flammable. Application of xylene is extensive and includes, but is not limited to, printing, rubber, and leather industries.
Similarly, it is used as a cleaning agent for steel and silicon wafers. In the petroleum industry, xylene is also a frequent component of paraffin solvents, used when the tubing becomes clogged with paraffin wax. Xylene is incompatible with strong oxidisers and is known to cause fires and explosions. There are three forms of xylene in which the methyl groups vary on the benzene ring: (i) meta-xylene, (ii) ortho-xylene, and (iii) para-xylene. These forms are referred to as isomers. Xylene is a colourless, sweet-smelling liquid. Xylene occurs naturally in petroleum and coal tar. Chemical industries produce xylene from petroleum. It is also used as a cleaning agent and a thinner for paint and in paints, in glues, in printing inks, and in varnishes. Xylene evaporates quickly from the soil and surface water into the air.

Aviation gasoline; protective coatings; solvent for alkyd resins, lacquers, enamels, rubber cements; synthesis of organic chemicals.

Safety

Symbol(GHS) 
GHS02,GHS07,GHS08
Signal word  Danger
Hazard statements  H226-H304-H312+H332-H315-H319-H335-H373-H412
Precautionary statements  P210-P273-P280-P301+P310-P303+P361+P353-P331
Hazard Codes  Xn,F
Risk Statements  10-20/21-38-36/38-65-48/20
Safety Statements  25-36/37-62
OEB A
OEL TWA: 100.0 ppm; 435.0 mg/m3, STEL: 150.0 ppm; 655.0 mg/m3
RIDADR  UN 1307 3/PG 3
WGK Germany  2
RTECS  ZE2100000
Autoignition Temperature 867 °F
TSCA  Yes
HazardClass  3
PackingGroup  II
HS Code  29024400
Toxicity LD50 oral in rat: 4300mg/kg

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