ChemicalBook CAS DataBase List 95-93-2

95-93-2

Name	1,2,4,5-Tetramethylbenzene
CAS	95-93-2
EINECS(EC#)	202-465-7
Molecular Formula	C10H14
MDL Number	MFCD00008528
Molecular Weight	134.22
MOL File	95-93-2.mol

Synonyms

1,2,4,5-TETRAMETHYLBENZENE DURENE DUROL LABOTEST-BB LT00852111 sym-Tetramethylbenzene 1,2,4,5-tetramethyl-benzen 2,5-dimethyl-p-xylen benzene,1,2,4,5-tetramethyl- I,i,4,5-Tetramcthylben~oiaG 1,2,4,5-Tetramethylbenzene,99% Durol[R] durene,1,2,4,5-tetramethylbenzene,durol 1,2,4,5-TERAMETHYLBENZENE 1,2,4,5-Tetramethylbenzol 1,2,4,5-TETRAMETHYLBENZENE (DURENE) 1,2,4,5-Tetramethylbenzene, 97+% 1,2,4,5-Tetramethylbenzene Zone Refined (number of passes:23) 1,2,4,5-Tetramethylbenzoate 2,5-Dimethyl-p-xylene

Chemical Properties

Appearance	white to brown semi-transparent crystals
Melting point	78 °C
Boiling point	196-197 °C
density	0.838 g/mL at 25 °C(lit.)
vapor density	4.6 (vs air)
vapor pressure	160 mm Hg ( 140 °C)
refractive index	1.5093
Fp	165 °F
storage temp.	Flammables area
solubility	0.00348g/l
form	neat
color	White to Almost white
Specific Gravity	0.838
Odor	rancid sweet
Water Solubility	insoluble
Specific Heat Capacity	Cp(crystal):1.60259J/(g·K),at 25℃
Merck	14,3468
BRN	1903393
Henry's Law Constant	2.49 at 25 °C (approximate - calculated from water solubility and vapor pressure)
InChI	1S/C10H14/c1-7-5-9(3)10(4)6-8(7)2/h5-6H,1-4H3
InChIKey	SQNZJJAZBFDUTD-UHFFFAOYSA-N
SMILES	Cc1cc(C)c(C)cc1C
LogP	4.000
CAS DataBase Reference	95-93-2(CAS DataBase Reference)
NIST Chemistry Reference	Benzene, 1,2,4,5-tetramethyl-(95-93-2)
EPA Substance Registry System	95-93-2(EPA Substance)

Safety Data

Symbol(GHS)	GHS02,GHS09
Signal word	Danger
Hazard statements	H228-H410
Precautionary statements	P210-P240-P241-P273-P280-P370+P378
Hazard Codes	F
Risk Statements	R11:Highly Flammable. less more
Safety Statements	S16:Keep away from sources of ignition-No smoking . less more
RIDADR	UN 1325 4.1/PG 2
WGK Germany	1
RTECS	DC0500000
TSCA	Yes
HazardClass	4.1
PackingGroup	III
HS Code	29029080
Storage Class	4.1B - Flammable solid hazardous materials
Hazard Classifications	Aquatic Acute 1 Aquatic Chronic 1 Flam. Sol. 1
Toxicity	LD50 orally in Rabbit: 6700 mg/kg less more

Raw materials And Preparation Products

Hazard Information

General Description

Colorless crystals with a camphor-like odor.

Reactivity Profile

Vigorous reactions, sometimes amounting to explosions, can result from the contact between aromatic hydrocarbons, such as 1,2,4,5-TETRAMETHYLBENZENE(95-93-2), and strong oxidizing agents. They can react exothermically with bases and with diazo compounds. Substitution at the benzene nucleus occurs by halogenation (acid catalyst), nitration, sulfonation, and the Friedel-Crafts reaction.

Air & Water Reactions

Insoluble in water.

Chemical Properties

white to brown semi-transparent crystals

Physical properties

Colorless crystals or scales with a camphor-like odor

Uses

1,2,4,5-Tetramethylbenzene is used in method for reducing odor in room in remodeling work by removing causative substances.

Uses

Plasticizers; polymers; fibers; organic synthesis.

Definition

ChEBI: Durene is a tetramethylbenzene carrying methyl groups at positions 1, 2, 4 and 5.

Synthesis

Even tetramethylbenzene is one of the components of coal tar, originally prepared from metatrimethylbenzene in 1870. It is obtained by the methylation reaction of other toluene, such as p-xylene or meta-trimethylbenzene.
C6H4(CH3)2 + 2CH3Cl &rar

Purification Methods

Chromatograph durene on alumina, and recrystallise it from aqueous EtOH or *benzene. Zone-refining removes duroaldehydes. Dry it under vacuum. [Yamauchi et al. J Phys Chem 89 4804 1985.] It has also been sublimed in vacuo [Johnston et al. J Am Chem Soc 109 1291 1987]. [Beilstein 5 H 431, 5 I 207, 5 II 329, 5 III 979, 5 IV 1076.]

Toxics Screening Level

The initial threshold screening level (ITSL) for 1,2,4,5-tetramethyl benzene is 20 μg/m3 (annual averaging time).

Material Safety Data Sheet(MSDS)

Spectrum Detail

Well-known Reagent Company Product Information

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