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m-Xylene CAS# 108-38-3
CAS Number: 108-38-3
Chemical Formula: C8H10
Synonyms:
m-Xylene
2,4-Xylene;3-methyltoluene
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 | n |
| 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
Meta-xylene is mainly used as a solvent to produce isophthalic acid and then unsaturated polyester resins and coatings. It is also used to produce meta-toluic acid, isophthalic acid nitrile, pharmaceutical lidocaine, oxymetazoline, and new pan-shadow, etc. It can also be used as a raw material and dye intermediate for spices, oil-soluble colorants for color film, etc.
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