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

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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)

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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)

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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.

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N-Bromosuccinimide Price

Sigma-Aldrich

Product number: T73202
Product name: 1,2,3-Trimethylbenzene
Packaging: 5ml
Price: $59.3
Updated: 2024/03/01

Sigma-Aldrich

Product number: 45935
Product name: 1,2,3-Trimethylbenzene
Purity: analytical standard
Packaging: 250mg
Price: $44.5
Updated: 2024/03/01

TCI Chemical

Product number: T0468
Product name: 1,2,3-Trimethylbenzene
Purity: >80.0%(GC)
Packaging: 5mL
Price: $35
Updated: 2024/03/01

TCI Chemical

Product number: T0468
Product name: 1,2,3-Trimethylbenzene
Purity: >80.0%(GC)
Packaging: 25mL
Price: $126
Updated: 2024/03/01

Sigma-Aldrich

Product number: T73202
Product name: 1,2,3-Trimethylbenzene
Packaging: 50ml
Price: $172
Updated: 2024/03/01

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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

2,3-Dimethylbenzaldehyde

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View Lastest Price from 1,2,3-Trimethylbenzene manufacturers

Zhuozhou Wenxi import and Export Co., Ltd

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

Zhuozhou Wenxi import and Export Co., Ltd

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

Zhuozhou Wenxi import and Export Co., Ltd

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

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