Home Categories Organic Chemistry m-Xylene
A8434412

m-Xylene , >99.0%(GC) , 108-38-3

Synonym(s):
m-Xylene;1,3-Dimethylbenzene;m-Xylene

CAS NO.:108-38-3

Empirical Formula: C8H10

Molecular Weight: 106.17

MDL number: MFCD00008536

EINECS: 203-576-3

Update time: 2022-07-08

PRODUCT Properties

Melting point: -48 °C (lit.)
Boiling point: 138-139 °C (lit.)
Density  0.868 g/mL at 25 °C (lit.)
vapor density  3.7 (vs air)
vapor pressure  16 mm Hg ( 37.7 °C)
refractive index  n20/D 1.497(lit.)
Flash point: 77 °F
storage temp.  2-8°C
solubility  Miscible with many organic solvents, including alcohol and ether
form  Liquid
pka >15 (Christensen et al., 1975)
color  Colorless
Odor Like benzene; characteristic aromatic.
explosive limit 1.1-7%(V)
Odor Threshold 0.041ppm
Water Solubility  Miscible with organic solvents. Immiscible with water.
Merck  14,10081
BRN  605441
Henry's Law Constant 14.80 at 45.00 °C, 17.26.4 at 50.00 °C, 19.90 at 55.00 °C, 23.01.3 at 60.00 °C, 27.46.3 at 70.00 °C (static headspace-GC, Park et al., 2004)
Exposure limits NIOSH REL: 100 ppm (435 mg/m3), STEL 150 ppm (655 mg/m3), IDLH 900 ppm; OSHA PEL: TWA 100 ppm; ACGIH TLV: TWA 100 ppm, STEL 150 ppm (adopted).
Dielectric constant 2.3999999999999999
InChIKey IVSZLXZYQVIEFR-UHFFFAOYSA-N
LogP 3.16 at 20℃

Description and Uses

Xylene exists in three isomeric forms, ortho-,meta-, and para-xylene. Commercial xylene is a mixture ofthese three isomers and may also contain ethylbenzene aswell as small amounts of toluene, trimethylbenzene, phenol,thiophene, pyridine, and other nonaromatic hydrocarbons.m-Xylene is predominant in commercial xylene. The physical properties of the three isomers are as follows:Isomer MeltingPoint(℃)BoilingPoint(℃)FlashPoint(℃)LowerExpl.(%)UpperExpl.(%)AutoTemp.(℃)ortho- -25 144 32 0.9 6.7 463meta- -48 139 27 1.1 7.0 527para- 13 138 27 1.1 7.0 528

Meta-Xylene is used for the production of isophthalic acid, of agriculture chemicals as pharmaceuticals. It finds applications in paint and varnish removers and aerosol paint concentrates. Product Data Sheet

Safety

Symbol(GHS) 
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,T,F
Risk Statements  10-20/21-38-39/23/24/25-23/24/25-11-36/38
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  ZE2275000
Autoignition Temperature 982 °F
TSCA  Yes
HazardClass  3
PackingGroup  II
HS Code  29024200
Toxicity LD50 orally in rats: 7.71 ml/kg (Smyth)

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