1,2,3-Trimethylbenzene
- CAS No.
- 526-73-8
- Chemical Name:
- 1,2,3-Trimethylbenzene
- Synonyms
- benzene,1,2,3-trimethyl-;80.0%;HEMELLITOL;hemimellitol;Hemimelithol;HEMIMELLITINE;HEMIMELLITENE;1.2.3-Trimethy;1,2,3-TrimethyL;1,2,3-Trimethylbenze
- CBNumber:
- CB6853732
- Molecular Formula:
- C9H12
- Molecular Weight:
- 120.19
- MDL Number:
- MFCD00008520
- MOL File:
- 526-73-8.mol
- MSDS File:
- SDS
| Melting point | −25 °C(lit.) |
|---|---|
| Boiling point | 175-176 °C(lit.) |
| Density | 0.894 g/mL at 25 °C(lit.) |
| vapor density | 4.15 (vs air) |
| vapor pressure | 3.4 mm Hg ( 37.7 °C) |
| refractive index |
n |
| Flash point | 119 °F |
| solubility | Soluble in acetone, alcohol, benzene, and ether (Weast, 1986) |
| pka | >14 (Schwarzenbach et al., 1993) |
| color | Colorless to Light yellow |
| Odor Threshold | 0.032ppm |
| Water Solubility | 65.51mg/L(25 ºC) |
| BRN | 1903410 |
| Henry's Law Constant | 3.18 at 25 °C (approximate - calculated from water solubility and vapor pressure) |
| Exposure limits | NIOSH REL: TWA 25 ppm (125 mg/m3); ACGIH TLV: TWA for mixed isomers 25 ppm (adopted). |
| Dielectric constant | 2.6600000000000001 |
| Stability | Stable. Flammable. Incompatible with strong oxidizing agents. |
| LogP | 3.660 |
| CAS DataBase Reference | 526-73-8(CAS DataBase Reference) |
| FDA UNII | ZK4R7UPH6R |
| NIST Chemistry Reference | Benzene, 1,2,3-trimethyl-(526-73-8) |
| EPA Substance Registry System | 1,2,3-Trimethylbenzene (526-73-8) |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |   GHS02,GHS07 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Warning | |||||||||
| Hazard statements | H226-H315-H319-H335 | |||||||||
| Precautionary statements | P210-P302+P352-P305+P351+P338 | |||||||||
| Hazard Codes | Xi | |||||||||
| Risk Statements | 10-37-36/37/38 | |||||||||
| Safety Statements | 16-26 | |||||||||
| RIDADR | UN 3295 3/PG 3 | |||||||||
| WGK Germany | 3 | |||||||||
| RTECS | DC3300000 | |||||||||
| Autoignition Temperature | 878 °F | |||||||||
| HazardClass | 3.2 | |||||||||
| PackingGroup | III | |||||||||
| HS Code | 2902900000 | |||||||||
| NFPA 704 |
|
1,2,3-Trimethylbenzene price More Price(10)
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Sigma-Aldrich | T73202 | 1,2,3-Trimethylbenzene | 526-73-8 | 5ml | $59.3 | 2024-03-01 | Buy |
| Sigma-Aldrich | 45935 | 1,2,3-Trimethylbenzene analytical standard | 526-73-8 | 250mg | $44.5 | 2024-03-01 | Buy |
| TCI Chemical | T0468 | 1,2,3-Trimethylbenzene >80.0%(GC) | 526-73-8 | 5mL | $35 | 2024-03-01 | Buy |
| TCI Chemical | T0468 | 1,2,3-Trimethylbenzene >80.0%(GC) | 526-73-8 | 25mL | $126 | 2024-03-01 | Buy |
| Sigma-Aldrich | T73202 | 1,2,3-Trimethylbenzene | 526-73-8 | 50ml | $172 | 2024-03-01 | Buy |
1,2,3-Trimethylbenzene Chemical Properties,Uses,Production
Chemical Properties
Trimethylbenzenes exists in three isomeric forms. All isomers are clear, colorless liquids with a distinctive, aromatic odor.
Chemical Properties
colourless liquid
Physical properties
Clear, colorless, flammable liquid with an aromatic odor similar to propylbenzene, ethylbenzenes, or xylenes.
Uses
Raw material for chemical synthesis.
Definition
ChEBI: A trimethylbenzene carrying methyl groups at positions 1, 2 and 3. It has been found in Centaurium erythraea.
Synthesis Reference(s)
Journal of the American Chemical Society, 62, p. 2639, 1940 DOI: 10.1021/ja01867a017
Organic Syntheses, Coll. Vol. 4, p. 508, 1963
Hazard
Combustible. Central nervous system impairment, asthma, and hematologic effects.
Safety Profile
Mildly toxic by ingestion, Flammable liquid when exposed to heat, sparks, or flame. To fight fire, use water spray, mist, dry chemical, CO2, foam. When heated to decomposition it emits acrid smoke and irritating fumes.
Potential Exposure
(1,2,3-and 1,2,4-isomers): These materials are used as solvents and in dye and perfume manufacture. The 1,2,3-isomer is used as raw material in chemical synthesis and as an UV stabilizer. The 1,2,4-isomer is used as the raw material for trimellitic anhydride manufacture. These compounds are found in diesel engine exhaust fumes.
Source
Detected in distilled water-soluble fractions of 87 octane gasoline (0.30 mg/L), 94 octane
gasoline (0.81 mg/L), Gasohol (0.80 mg/L), No. 2 fuel oil (0.22 mg/L), diesel fuel (0.09 mg/L),
and military jet fuel JP-4 (0.19 mg/L) (Potter, 1996).
Thomas and Delfino (1991) equilibrated contaminant-free groundwater collected from
Gainesville, FL with individual fractions of three individual petroleum products at 24–25 °C for
24 h. The aqueous phase was analyzed for organic compounds via U.S. EPA approved test method
602. Average 1,2,3-trimethylbenzene concentrations detected in water-soluble fractions of
unleaded gasoline, kerosene, and diesel fuel were 1.219, 0.405, and 0.118 mg/L, respectively.
When the authors analyzed the aqueous-phase via U.S. EPA approved test method 610, average
1,2,3-trimethylbenzene concentrations in water-soluble fractions of unleaded gasoline, kerosene,
and diesel fuel were smaller, i.e., 742, 291, and 105 μg/L, respectively.
Environmental Fate
Photolytic. Glyoxal, methylglyoxal, and biacetyl were produced from the photooxidation of
1,2,3-trimethylbenzene by OH radicals in air at 25 °C (Tuazon et al., 1986a). The rate constant for
the reaction of 1,2,3-trimethylbenzene and OH radicals at room temperature was 1.53 x 10-11
cm3/molecule?sec (Hansen et al., 1975). A rate constant of 1.49 x 10-8 L/molecule?sec was reported
for the reaction of 1,2,3-trimethylbenzene with OH radicals in the gas phase (Darnall et al., 1976).
Similarly, a room temperature rate constant of 3.16 x 10-11 cm3/molecule?sec was reported for the
vapor-phase reaction of 1,2,3-trimethylbenzene with OH radicals (Atkinson, 1985). At 25 °C, a
rate constant of 2.69 x 10-11 cm3/molecule?sec was reported for the same reaction (Ohta and
Ohyama, 1985). 2,3-Butanedione was the only products identified from the OH radical-initiated
reaction of 1,2,4-trimethylbenzene in the presence of nitrogen dioxide. The amount of 2,3-
butanedione formed decreased with increased concentration of nitrogen dioxide (Bethel et al.,
2000).
Chemical/Physical. 1,2,3-Trimethylbenzene will not hydrolyze because it does not contain a
hydrolyzable group (Kollig, 1993).
Shipping
UN3295 Hydrocarbons, liquid, n.o.s., Hazard Class: 3; Labels: 3-Flammable liquid. UN1993 Flammable liquids, n.o.s., Hazard Class: 3; Labels: 3-Flammable liquid, Technical Name Required. 1,3,5-Trimethylbenzene; UN2325, Hazard Class: 3; Labels: 3-Flammable liquid. 1,2,4-Trimethylbenzene:
Incompatibilities
Vapors may form explosive mixture with air. Incompatible with oxidizers (chlorates, nitrates, peroxides, permanganates, perchlorates, chlorine, bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases, strong acids, oxoacids, epoxides.
Waste Disposal
Dissolve or mix the material with a combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber. All federal, state, and local environmental regulations must be observed.
1,2,3-Trimethylbenzene Preparation Products And Raw materials
Raw materials
Preparation Products
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Henan Tianfu Chemical Co.,Ltd. | +86-0371-55170693 +86-19937530512 | info@tianfuchem.com | China | 21695 | 55 |
| Xi'an Kono chem co., Ltd., | 029-86107037 13289246953 | info@konochemical.com | China | 2995 | 58 |
| Hubei xin bonus chemical co. LTD | 86-13657291602 | linda@hubeijusheng.com | CHINA | 22968 | 58 |
| career henan chemical co | +86-0371-86658258 15093356674; | factory@coreychem.com | China | 29826 | 58 |
| Hefei TNJ Chemical Industry Co.,Ltd. | 0551-65418671 | sales@tnjchem.com | China | 34572 | 58 |
| Baoji Guokang Bio-Technology Co., Ltd. | 0917-3909592 13892490616 | gksales1@gk-bio.com | China | 9339 | 58 |
| Dayang Chem (Hangzhou) Co.,Ltd. | 571-88938639 +8617705817739 | info@dycnchem.com | CHINA | 52867 | 58 |
| CD Chemical Group Limited | +8615986615575 | info@codchem.com | China | 20356 | 58 |
| Shaanxi Didu New Materials Co. Ltd | +86-89586680 +86-13289823923 | 1026@dideu.com | China | 9309 | 58 |
| LEAP CHEM CO., LTD. | +86-852-30606658 | market18@leapchem.com | China | 24738 | 58 |
View Lastest Price from 1,2,3-Trimethylbenzene manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2023-07-27 | 1,2,3-Trimethylbenzene
526-73-8
|
US $1.50 / g | 1g | 99.0% Min | 100 Tons | Shaanxi Didu New Materials Co. Ltd | |
 |
2021-07-13 | 1,2,3-Trimethylbenzene
526-73-8
|
US $15.00-10.00 / KG | 1KG | 99%+ HPLC | Monthly supply of 1 ton | Zhuozhou Wenxi import and Export Co., Ltd | |
 |
2021-07-10 | 1,2,3-Trimethylbenzene
526-73-8
|
US $15.00-10.00 / KG | 1KG | 99%+ HPLC | Monthly supply of 1 ton | Zhuozhou Wenxi import and Export Co., Ltd |
-
- 1,2,3-Trimethylbenzene
526-73-8
- US $1.50 / g
- 99.0% Min
- Shaanxi Didu New Materials Co. Ltd
-
- 1,2,3-Trimethylbenzene
526-73-8
- US $15.00-10.00 / KG
- 99%+ HPLC
- Zhuozhou Wenxi import and Export Co., Ltd
-
- 1,2,3-Trimethylbenzene
526-73-8
- US $15.00-10.00 / KG
- 99%+ HPLC
- Zhuozhou Wenxi import and Export Co., Ltd
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