1,2,3-Trimethylbenzene
- Product Name
- 1,2,3-Trimethylbenzene
- CAS No.
- 526-73-8
- Chemical Name
- 1,2,3-Trimethylbenzene
- Synonyms
- benzene,1,2,3-trimethyl-;80.0%;HEMELLITOL;Hemimelithol;hemimellitol;HEMIMELLITINE;HEMIMELLITENE;1.2.3-Trimethy;1,2,3-TrimethyL;1,2,3-Trimethylbenze
- CBNumber
- CB6853732
- Molecular Formula
- C9H12
- Formula Weight
- 120.19
- MOL File
- 526-73-8.mol
1,2,3-Trimethylbenzene Property
- 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
- n20/D 1.513(lit.)
- 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)
- NIST Chemistry Reference
- Benzene, 1,2,3-trimethyl-(526-73-8)
- EPA Substance Registry System
- 1,2,3-Trimethylbenzene (526-73-8)
Safety
- Hazard Codes
- Xi
- Risk Statements
- 10-37-36/37/38
- Safety Statements
- 16-26
- RIDADR
- UN 3295 3/PG 3
- OEB
- A
- OEL
- TWA: 25 ppm (125 mg/m3)
- WGK Germany
- 3
- RTECS
- DC3300000
- Autoignition Temperature
- 878 °F
- HazardClass
- 3.2
- PackingGroup
- III
- HS Code
- 2902900000
- Hazardous Substances Data
- 526-73-8(Hazardous Substances Data)
Hazard and Precautionary Statements (GHS)
- Symbol(GHS)
-
- Signal word
- Warning
- Hazard statements
-
H226Flammable liquid and vapour
H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation
- Precautionary statements
-
P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P302+P352IF ON SKIN: wash with plenty of soap and water.
P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
N-Bromosuccinimide Price
- Product number
- T73202
- Product name
- 1,2,3-Trimethylbenzene
- Packaging
- 5ml
- Price
- $59.3
- Updated
- 2024/03/01
- Product number
- 45935
- Product name
- 1,2,3-Trimethylbenzene
- Purity
- analytical standard
- Packaging
- 250mg
- Price
- $44.5
- Updated
- 2024/03/01
- Product number
- T0468
- Product name
- 1,2,3-Trimethylbenzene
- Purity
- >80.0%(GC)
- Packaging
- 5mL
- Price
- $35
- Updated
- 2024/03/01
- Product number
- T0468
- Product name
- 1,2,3-Trimethylbenzene
- Purity
- >80.0%(GC)
- Packaging
- 25mL
- Price
- $126
- Updated
- 2024/03/01
- Product number
- T73202
- Product name
- 1,2,3-Trimethylbenzene
- Packaging
- 50ml
- Price
- $172
- Updated
- 2024/03/01
1,2,3-Trimethylbenzene Chemical Properties,Usage,Production
Chemical Properties
colourless liquid
Chemical Properties
Trimethylbenzenes exists in three isomeric forms. All isomers are clear, colorless liquids with a distinctive, aromatic odor.
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
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View Lastest Price from 1,2,3-Trimethylbenzene manufacturers
- Product
- 1,2,3-Trimethylbenzene 526-73-8
- Price
- US $15.00-10.00/KG
- Min. Order
- 1KG
- Purity
- 99%+ HPLC
- Supply Ability
- Monthly supply of 1 ton
- Release date
- 2021-07-11
- Product
- 1,2,3-Trimethylbenzene 526-73-8
- Price
- US $15.00-10.00/KG
- Min. Order
- 1KG
- Purity
- 99%+ HPLC
- Supply Ability
- Monthly supply of 1 ton
- Release date
- 2021-07-09
- Product
- 1,2,3-Trimethylbenzene 526-73-8
- Price
- US $15.00-10.00/KG
- Min. Order
- 1KG
- Purity
- 99%+ HPLC
- Supply Ability
- Monthly supply of 1 ton
- Release date
- 2021-06-27