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2,4-DIMETHYLPENTANE

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2,4-DIMETHYLPENTANE Basic information

Product Name:
2,4-DIMETHYLPENTANE
Synonyms:
  • dimethylpentane(non-specificname)
  • pentane,2,4-dimethyl-
  • 2,4-DIMETHYLPENTANE
  • DIISOPROPYLMETHANE
  • Dimethylpentane
  • 2,4-DIMETHYLPENTANE, STANDARD FOR GC
  • Heptan und Isomere
  • 2,4-DIMETHYLPENTANE 99+%
CAS:
108-08-7
MF:
C7H16
MW:
100.2
EINECS:
203-548-0
Product Categories:
  • Building Blocks
  • Chemical Synthesis
  • Acyclic
  • Alkanes
  • Organic Building Blocks
  • Organic Building Blocks
  • Alphabetic
  • D
  • DID - DINChemical Class
  • Hydrocarbons
  • Neats
Mol File:
108-08-7.mol
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2,4-DIMETHYLPENTANE Chemical Properties

Melting point:
−123 °C(lit.)
Boiling point:
80 °C(lit.)
Density 
0.673 g/mL at 25 °C(lit.)
vapor density 
3.48 (vs air)
vapor pressure 
3.29 psi ( 37.7 °C)
refractive index 
n20/D 1.381(lit.)
Flash point:
10 °F
solubility 
Soluble in acetone, benzene, chloroform, alcohol and ether.
pka
>14 (Schwarzenbach et al., 1993)
color 
Colorless to Almost colorless
explosive limit
~7%
Odor Threshold
0.94ppm
Water Solubility 
4.41mg/L(25 ºC)
BRN 
1696855
Henry's Law Constant
2.94(atm?m3/mol) at 25 °C (Mackay and Shiu, 1981)
Dielectric constant
1.9(-7℃)
Exposure limits
ACGIH: TWA 400 ppm; STEL 500 ppm
CAS DataBase Reference
108-08-7(CAS DataBase Reference)
EPA Substance Registry System
2,4-Dimethylpentane (108-08-7)
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Safety Information

Hazard Codes 
F,Xn,N
Risk Statements 
11-38-50/53-65-67
Safety Statements 
9-16-29-33-60-61-62
RIDADR 
UN 3295 3/PG 2
WGK Germany 
3
TSCA 
Yes
HS Code 
2901.10.5000
HazardClass 
3
PackingGroup 
II

MSDS

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2,4-DIMETHYLPENTANE Usage And Synthesis

Chemical Properties

Colorless liquid with an odor resembling heptane. An odor threshold concentration of 940 ppbv was reported by Nagata and Takeuchi (1990).

Uses

It is not only used for synthesizing WeiNiGuan, but also used in binder and coating industry. It is used for synthesizing resin fiber. It is also used as intermediates and adhesives in oil drop coagulation thickener.

Source

In diesel engine exhaust at a concentration of 0.3% of emitted hydrocarbons (quoted, Verschueren, 1983). Schauer et al. (1999) reported 2,4-dimethylpentane in a diesel-powered medium-duty truck exhaust at an emission rate of 410 μg/km.
California Phase II reformulated gasoline contained 2,2-dimethylbutane at a concentration of 15,700 mg/kg. Gas-phase tailpipe emission rates from gasoline-powered automobiles with and without catalytic converters were 2.92 and 354 mg/km, respectively (Schauer et al., 2002).

Environmental Fate

Photolytic. Based on a photooxidation rate constant of 5.0 x 10-12 cm3/molecule?sec for the reaction of 2,3-dimethypentane and OH radicals in air, the half-life is 27 h (Alltshuller, 1991).
Chemical/Physical. Complete combustion in air yields carbon dioxide and water vapor. 2,4- Dimethylpentane will not hydrolyze because it has no hydrolyzable functional group.

Purification Methods

Extract it repeatedly with conc H2SO4, wash with water, dry and distil it. Alternatively percolated it through silica gel (previously heated in nitrogen to 350o). Purify it by azeotropic distillation with EtOH, followed by washing out the EtOH with water, drying and distilling. [Beilstein 1 IV 406.]

2,4-DIMETHYLPENTANESupplier

Alfa Aesar
Tel
400-6106006
Email
saleschina@alfa-asia.com
TCI (Shanghai) Development Co., Ltd.
Tel
021-67121386
Email
Sales-CN@TCIchemicals.com
Energy Chemical
Tel
021-021-58432009 400-005-6266
Email
sales8178@energy-chemical.com
Shanghai Longsheng chemical Co.,Ltd.
Tel
021-58099652-8005 13585536065
Email
bin.wu@shlschem.com
Shandong Xiya Chemical Co., Ltd
Tel
4009903999 13355009207
Email
3007715519@qq.com