A7729612
1,2,4-Trimethylbenzene , Analysis standard , 95-63-6
Synonym(s):
1,2,4-Trimethylbenzene;Pseudocumene;Pseudocumol
CAS NO.：95-63-6
Empirical Formula: C9H12
Molecular Weight: 120.19
MDL number: MFCD00008527
EINECS: 202-436-9
Update time: 2022-07-08
PRODUCT Properties
| Melting point: | -44 °C |
| Boiling point: | 168 °C(lit.) |
| Density | 0.876 g/mL at 20 °C(lit.) |
| vapor density | 4.1 (vs air) |
| vapor pressure | 4.5 mm Hg ( 37.7 °C) |
| refractive index | n |
| Flash point: | 120 °F |
| storage temp. | Store below +30°C. |
| solubility | 0.057g/l |
| pka | >14 (Schwarzenbach et al., 1993) |
| form | Liquid |
| color | Clear colorless |
| Odor | char. aromatic odor |
| explosive limit | 0.8-7%(V) |
| Odor Threshold | 0.12ppm |
| Water Solubility | Soluble in alcohol, benzene and ether. Slightly soluble in water |
| Merck | 14,7915 |
| BRN | 1903005 |
| Henry's Law Constant | 6.946, 11.202, and 15.702 at 27.0, 35.0, and 45.0 °C, respectively (dynamic headspace, Hansen et al., 1995) |
| Exposure limits | NIOSH REL: TWA 25 ppm (125 mg/m3); ACGIH TLV: TWA for mixed
isomers 25 ppm (adopted). |
| Dielectric constant | 2.4（16℃） |
| Stability: | Stable. Incompatible with strong oxidizing agents. Flammable. May form explosive mixtures with air. |
| InChIKey | GWHJZXXIDMPWGX-UHFFFAOYSA-N |
| LogP | 3.630 |
| CAS DataBase Reference | 95-63-6(CAS DataBase Reference) |
| EPA Substance Registry System | 1,2,4-Trimethylbenzene (95-63-6) |
Description and Uses
1,2,4-Trimethylbenzene (mesitylene) is an aromatic hydrocarbon compound commonly present in commercial solvents encompassing their boiling range. Mesitylene are the most common isomer used in commercial applications. Aromatic hydrocarbons in hydrocarbon solvents are predominantly alkylated one ring structures as well as two aromatic ring structures which may also be alkylated.
1,2,4-Trimethylbenzene is the unlabelled version of 1,2,4-Trimethyl 13C6-benzene (T796173), a labelled aromatic standard.
Safety
| Symbol(GHS) |     GHS02,GHS07,GHS08,GHS09 |
| Signal word | Danger |
| Hazard statements | H226-H304-H315-H319-H332-H335-H411 |
| Precautionary statements | P210-P273-P301+P310+P331-P302+P352-P304+P340+P312-P305+P351+P338 |
| Hazard Codes | Xn,N,F,Xi,T |
| Risk Statements | 10-20-36/37/38-51/53-39/23/24/25-23/24/25-11-65 |
| Safety Statements | 26-61-45-36/37-16-7-62 |
| OEB | A |
| OEL | TWA: 25 ppm (125 mg/m3) |
| RIDADR | UN 3295 3/PG 3 |
| WGK Germany | 2 |
| RTECS | DC3325000 |
| Autoignition Temperature | 959 °F |
| Hazard Note | Irritant/Flammable |
| TSCA | Yes |
| HazardClass | 3 |
| PackingGroup | III |
| HS Code | 29029090 |
| Hazardous Substances Data | 95-63-6(Hazardous Substances Data) |
| Toxicity | LD50 i.p. in male, female mice (mg/kg): 5000, 4100 (Janik-Spiechowicz) |
