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m-Xylene Structure

m-Xylene

Chemical 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.
Odor Threshold 0.041ppm
explosive limit 1.1-7%(V)
Viscosity 0.75mm2/s
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℃
CAS DataBase Reference 108-38-3(CAS DataBase Reference)
EWG's Food Scores 7
FDA UNII O9XS864HTE
NIST Chemistry Reference Benzene, 1,3-dimethyl-(108-38-3)
EPA Substance Registry System m-Xylene (108-38-3)

Safety

Symbol(GHS)
Signal wordDanger
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
Hazardous Substances Data 108-38-3(Hazardous Substances Data)
Toxicity LD50 orally in rats: 7.71 ml/kg (Smyth)
NFPA 704:
3
2 0

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m-Xylene Chemical Properties,Usage,Production

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