m-Xylene CAS# 108-38-3
CAS Number: 108-38-3
Chemical Formula: C8H10
Synonyms:
Appearance: Colorless liquid
HS Code: 29024200
MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)
Products Description of m-Xylene CAS# 108-38-3
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
Parameters
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.) |
Fp | 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) |
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) |
Dielectric constant | 2.3999999999999999 |
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). |
InChIKey | IVSZLXZYQVIEFR-UHFFFAOYSA-N |
LogP | 3.16 at 20℃ |
Surface tension | 28.47mN/m at 298.15K |
CAS DataBase Reference | 108-38-3(CAS DataBase Reference) |
NIST Chemistry Reference | Benzene, 1,3-dimethyl-(108-38-3) |
EPA Substance Registry System | m-Xylene (108-38-3) |
Safety Information
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) |
Product Application of m-Xylene CAS# 108-38-3
m-Xylene is predominantly employed as a solvent and core raw material: it yields isophthalic acid for downstream unsaturated polyester resins and coatings, serves as a precursor for meta-toluic acid, isophthalonitrile, and pharmaceuticals (lidocaine, oxymetazoline, xin panshadow), and is applied in fragrances, dye intermediates, and oil-soluble colorants for color films.
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