2,2,5-TRIMETHYLHEXANE

CAS NO.：3522-94-9
Empirical Formula: C9H20
Molecular Weight: 128.26
MDL number: MFCD00026525
EINECS: 222-537-1
SAFETY DATA SHEET (SDS)
Update Date: 2023-06-08 17:06:36

What is 2,2,5-TRIMETHYLHEXANE?

Chemical properties

Colorless liquid.

Physical properties

Clear, colorless, flammable liquid with a faint aliphatic hydrocarbon odor. An odor threshold concentration of 900 ppb_v was reported by Nagata and Takeuchi (1990).

The Uses of 2,2,5-TRIMETHYLHEXANE

Synthesis, motor-fuel additive.

Hazard

Flammable, dangerous fire risk; the 2,3,3-, 2,3,4-, and 3,3,4-isomers are less flammable.

Environmental Fate

Chemical/Physical. Complete combustion in air produces carbon dioxide and water vapor. 2,2,5-Trimethylhexane will not hydrolyze because it does not contain a hydrolyzable functional group.

Solubility in water

In methanol, g/L: 162 at 5 °C, 179 at 10 °C, 200 at 15 °C, 221 at 20 °C, 247 at 25 °C, 280 at 30 °C, 316 at 35 °C, 360 at 40 °C (Kiser et al., 1961); miscible with hexane and pentane.

Properties of 2,2,5-TRIMETHYLHEXANE

Melting point:	-105.76°C
Boiling point:	122°C
Density	0,71 g/cm³
vapor pressure	3.647 at 0.000 °C, 5.072 at 5.000 °C, 6.958 at 10.000 °C, 9.418 at 15.000 °C, 12.583 at 20.000 °C,16.625 at 25.000 °C, 21.719 at 30.000 °C (inclined-piston, Osborn and Douslin, 1974)
refractive index	1.3990 to 1.4010
Flash point:	13°C
solubility	In methanol, g/L: 162 at 5 °C, 179 at 10 °C, 200 at 15 °C, 221 at 20 °C, 247 at 25 °C, 280 at 30 °C, 316 at 35 °C, 360 at 40 °C (Kiser et al., 1961); miscible with hexane and pentane.
form	clear liquid
pka	>14 (Schwarzenbach et al., 1993)
color	Colorless to Almost colorless
Odor Threshold	0.9ppm
Water Solubility	1.15mg/L(25 ºC)
Henry's Law Constant	3.45 at 25 °C (Mackay and Shiu, 1981)
Exposure limits	ACGIH TLV: TWA for all isomers 200 ppm (adopted).
CAS DataBase Reference	3522-94-9(CAS DataBase Reference)
EPA Substance Registry System	Hexane, 2,2,5-trimethyl- (3522-94-9)