A7676312
1,3,5-Trimethylbenzene , StandardforGC,≥99.0%(GC) , 108-67-8
Synonym(s):
1,3,5-Trimethylbenzene;Mesitylene solution
CAS NO.：108-67-8
Empirical Formula: C9H12
Molecular Weight: 120.19
MDL number: MFCD00008538
EINECS: 203-604-4
Update time: 2022-07-08
PRODUCT Properties
| Melting point: | -45 °C |
| Boiling point: | 163-166 °C(lit.) |
| Density | 0.864 g/mL at 25 °C(lit.) |
| vapor density | 4.1 (vs air) |
| vapor pressure | 14 mm Hg ( 55 °C) |
| refractive index | n |
| Flash point: | 112 °F |
| storage temp. | 2-8°C |
| solubility | Miscible with alcohol, benzene, ether (Windholz et al., 1983), and trimethylbenzene isomers. |
| pka | >14 (Schwarzenbach et al., 1993) |
| form | Liquid |
| color | Clear colorless |
| Odor Threshold | 0.17ppm |
| explosive limit | 0.88-6.1%, 100°F |
| Water Solubility | 2.9 g/L (20 ºC) |
| Merck | 14,5907 |
| BRN | 906806 |
| Henry's Law Constant | 4.03, 4.60, 5.71, 6.73, and 9.63 at 10, 15, 20, 25, and 30 °C, respectively (EPICS, Ashworth et al.,1988) |
| Exposure limits | NIOSH REL: TWA 25 ppm (125 mg/m3); ACGIH TLV: TWA for mixed
isomers 25 ppm (adopted). |
| Dielectric constant | 3.4（Ambient） |
| Stability: | Stable. Combustible. Incompatible with strong oxidizing agents. |
| InChIKey | AUHZEENZYGFFBQ-UHFFFAOYSA-N |
| LogP | 3.42 at 20℃ |
| CAS DataBase Reference | 108-67-8(CAS DataBase Reference) |
| NIST Chemistry Reference | Benzene, 1,3,5-trimethyl-(108-67-8) |
| EPA Substance Registry System | 1,3,5-Trimethylbenzene (108-67-8) |
Description and Uses
Mesitylene is a clear, colorless liquid with a distinctive, aromatic odor. Molecular weight= 120.21; Specific gravity (H2O:1)= 0.86;Boiling point=165℃; Freezing/Melting point=45℃; Vapor pressure= 2 mmHg at 20℃; Flash point=50℃ (cc); Autoignition temperature=559℃. Hazard Identification (based on NFPA-704 M Rating System): Health 0, Flammability 2, Reactivity 0. Practically insoluble in water; solubility= 0.002%.
Intermediate, including anthraquinone vat dyes, UV oxidation stabilizers for plastics.
Safety
| Symbol(GHS) |     GHS02,GHS07,GHS08,GHS09 |
| Signal word | Danger |
| Hazard statements | H226-H304-H315-H332-H335-H411 |
| Precautionary statements | P210-P273-P301+P310-P303+P361+P353-P304+P340+P312-P331 |
| Hazard Codes | Xi,N,F,T |
| Risk Statements | 10-37-51/53-39/23/24/25-23/24/25-11-37/38 |
| Safety Statements | 61-45-36/37-16-7 |
| RIDADR | UN 2325 3/PG 3 |
| OEB | A |
| OEL | TWA: 25 ppm (125 mg/m3) |
| WGK Germany | 2 |
| RTECS | OX6825000 |
| F | 10 |
| Autoignition Temperature | 1022 °F |
| Hazard Note | Irritant/Flammable |
| TSCA | Yes |
| HazardClass | 3 |
| PackingGroup | III |
| HS Code | 29029080 |
| Hazardous Substances Data | 108-67-8(Hazardous Substances Data) |
| Toxicity | LD50 (inhalation) for rats 24 g/m3/4-h (quoted, RTECS, 1985). |
