2,5-Dimethylhexane

  • Hexane, 2,5-dimethyl
  • Biisobutyl
Formula
C8H18
Structure
Description
Clear, colorless liquid.

Registry Numbers and Inventories.
CAS
592-13-2
EC (EINECS/ELINCS)
209-745-8
EC Index Number
601-009-00-8
EC Class
Highly flammable; Harmful; Irritant; Vapours may cause drowsiness and dizziness; Dangerous for the Environment
UN (DOT)
1262
Beilstein/Gmelin
1792782
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C8H18
Formula mass
114.23
Melting point, °C
-91
Boiling point, °C
109
Vapor pressure, mmHg
30 (25 C)
Critical temperature
276.8
Critical pressure
24.6
Density
0.6934 g/cm3 (20 C)
Solubility in water
Insoluble
Viscosity
0.485 cp (20 C)
Surface tension
19.66 g/s2 (20 C)
Refractive index
1.3929 (20 C)
Dielectric constant
1.938 (20 C)
Partition coefficient, pKow
4.64
Heat of vaporization
37.9 kJ/mol
Heat of combustion
-5464 kJ/mol

Hazards and Protection.
Storage
Keep away from sources of ignition. Store in a cool, dry place. Store in a tightly closed container. Flammables-area.
Handling
Use spark-proof tools and explosion proof equipment. Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes. Take precautionary measures against static discharges.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Remove all sources of ignition. Use a spark-proof tool. Provide ventilation.
Stability
No data.
Incompatibilities
Strong oxidizing agents.
Decomposition
Carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
-2
Autoignition, °C
437
Upper exp. limit, %
5.9
Lower exp. limit, %
0.9
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Will burn if involved in a fire. Containers may explode in the heat of a fire. Extinguishing media: Use water spray to cool fire-exposed containers. Use foam, dry chemical, or carbon dioxide.
Fire potential
HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.
Hazards
Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Exposure effects
The toxological properties of this substance have not been fully investigated.
   Ingestion
The toxicological properties of this substance have not been fully investigated. May cause headache.
   Inhalation
May cause respiratory tract irritation. The toxicological properties of this substance have not been fully investigated.
   Skin
May cause skin irritation.
   Eyes
May cause eye irritation.

First aid
 
   Ingestion
Get medical aid. Wash mouth out with water.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
UN number
1262
Response guide
Hazard class
3
Packing Group
II
 
USCG CHRIS Code
OAX
 
IMO Chemical Code
17
IMO Pollution Category
C
IMO Hazard code
P