2-Methylpentane, trivially known as isohexane, is a branched-chain alkane with the molecular formula C6H14. It is a structural isomer of hexane composed of a methyl group bonded to the second carbon atom in a pentane chain.
What is Isohexane used for?
A clear, colourless liquid commonly used as a constituent of gasoline and glues used for shoes, leather products and roofing. Additionally, it is used in solvents to extract oils for cooking and as a cleansing agent for shoe, furniture and textile manufacturing.
What is 2 Methylpentane used for?
2–Methylpentane is an alkane. Methyl pentane appears as colorless liquid. Isomers (2-methyl, 3-methyl) are possible and present in technical mixtures or singly for research purposes. Used in organic synthesis and as a solvent.
Does hexane or 2 Methylpentane have a higher boiling point?
The more symmetrical the molecules are, the easier it will be and the fewer spaces there will be between the molecules. Fewer spaces = better stacking. Hence, when you compare hexane to its structural isomer, 2–methylpentane, hexane has a much higher melting point due to the regular arrangement of its structure.
Boiling Point: 140.5 ° F at 760 mm Hg (USCG, …Flash Point: -20 ° F (USCG, 1999)Melting Point: -244.6 ° F (USCG, 1999)Vapor Pressure: 310.2 mm Hg (USCG, 1999)
Physical Properties
Flash Point: -20 ° F (USCG, 1999)
Lower Explosive Limit (LEL): 1.2 % (USCG, 1999)
Upper Explosive Limit (UEL): 7.7 % (USCG, 1999)
Autoignition Temperature: 585 ° F (USCG, 1999)
Melting Point: -244.6 ° F (USCG, 1999)
Vapor Pressure: 310.2 mm Hg (USCG, 1999)Vapor Density (Relative to Air): data unavailable
Specific Gravity: 0.653 at 68 ° F (USCG, 1999)
Boiling Point: 140.5 ° F at 760 mm Hg (USCG, 1999)
Molecular Weight: 86.18 (USCG, 1999)
Water Solubility: data unavailable
Ionization Potential: data unavailable
IDLH: data unavailable
Chemical Datasheet
Chemical Identifiers
| CAS Number | UN/NA Number | DOT Hazard Label | USCG CHRIS Code |
|---|
| NIOSH Pocket Guide | International Chem Safety Card |
|---|
| 107-83-5 | 1208 | Flammable Liquid | IHA |
| none | 2-METHYLPENTANE |
NFPA 704
| Diamond | Hazard | Value | Description |
|---|
| 310 | Health | 1 | Can cause significant irritation. |
| Flammability | 3 | Can be ignited under almost all ambient temperature conditions. |
| Instability | 0 | Normally stable, even under fire conditions. |
| Special | | |
(NFPA, 2010)General DescriptionWatery liquid with a gasoline-like odor, Floats on water. Produces an irritating vapor. (USCG, 1999)
Hazards
Reactivity Alerts
Air & Water ReactionsHighly flammable.Fire HazardExcerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]:
HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. 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. Those substances designated with a (P) may polymerize explosively when heated or involved in a fire. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water. Substance may be transported hot. For hybrid vehicles, ERG Guide 147 (lithium ion batteries) or ERG Guide 138 (sodium batteries) should also be consulted. If molten aluminum is involved, refer to ERG Guide 169. (ERG, 2016)Health HazardInhalation causes irritation of respiratory tract, cough, mild depression, cardiac arrhythmias. Aspiration causes severe lung irritation, coughing, pulmonary edema; excitement followed by depression. Ingestion causes nausea, vomiting, swelling of abdomen, headache, depression. (USCG, 1999)Reactivity ProfileSaturated aliphatic hydrocarbons, such as ISOHEXENE, may be incompatible with strong oxidizing agents like nitric acid. Charring of the hydrocarbon may occur followed by ignition of unreacted hydrocarbon and other nearby combustibles. In other settings, aliphatic saturated hydrocarbons are mostly unreactive. They are not affected by aqueous solutions of acids, alkalis, most oxidizing agents, and most reducing agents.Belongs to the Following Reactive Group(s)
- Hydrocarbons, Aliphatic Saturated
Potentially Incompatible Absorbents
No information available.
Response Recommendations
Isolation and EvacuationExcerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]:
As an immediate precautionary measure, isolate spill or leak area for at least 50 meters (150 feet) in all directions.
LARGE SPILL: Consider initial downwind evacuation for at least 300 meters (1000 feet).
FIRE: If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2016)FirefightingFire Extinguishing Agents Not to Be Used: Water may be ineffective
Fire Extinguishing Agents: Foam, carbon dioxide, or dry chemical (USCG, 1999)Non-Fire ResponseExcerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]:
ELIMINATE all ignition sources (no smoking, flares, sparks or flames in immediate area). All equipment used when handling the product must be grounded. Do not touch or walk through spilled material. Stop leak if you can do it without risk. Prevent entry into waterways, sewers, basements or confined areas. A vapor-suppressing foam may be used to reduce vapors. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. Use clean, non-sparking tools to collect absorbed material.
LARGE SPILL: Dike far ahead of liquid spill for later disposal. Water spray may reduce vapor, but may not prevent ignition in closed spaces. (ERG, 2016)Protective ClothingEye protection (as for gasoline). (USCG, 1999)DuPont Tychem® Suit FabricsNo information available.First AidINHALATION: maintain respiration, give oxygen if needed.
ASPIRATION: enforce bed rest; give oxygen.
INGESTION: do NOT induce vomiting; call a doctor.
EYES: wash with copious amount of water.
SKIN: wipe off, wash with soap and water. (USCG, 1999)
Physical Properties
Flash Point: -20 ° F (USCG, 1999)Lower Explosive Limit (LEL): 1.2 % (USCG, 1999)Upper Explosive Limit (UEL): 7.7 % (USCG, 1999)Autoignition Temperature: 585 ° F (USCG, 1999)Melting Point: -244.6 ° F (USCG, 1999)Vapor Pressure: 310.2 mm Hg (USCG, 1999)Vapor Density (Relative to Air): data unavailableSpecific Gravity: 0.653 at 68 ° F (USCG, 1999)Boiling Point: 140.5 ° F at 760 mm Hg (USCG, 1999)Molecular Weight: 86.18 (USCG, 1999)Water Solubility: data unavailableIonization Potential: data unavailableIDLH: data unavailable
AEGLs (Acute Exposure Guideline Levels)
No AEGL information available.
ERPGs (Emergency Response Planning Guidelines)
No ERPG information available.
PACs (Protective Action Criteria)
| Chemical | PAC-1 | PAC-2 | PAC-3 | |
|---|
| Methylpentane, 2-; (Isohexane) (107-83-5) | 1000 ppm | 11000 ppm | 66000 ppm | LEL = 12000 ppm |
indicates value is 50-99% of LEL.
indicates value is 100% or more of LEL.(DOE, 2016)
Regulatory Information
EPA Consolidated List of Lists
No regulatory information available.
DHS Chemical Facility Anti-Terrorism Standards (CFATS)
No regulatory information available.
OSHA Process Safety Management (PSM) Standard List
No regulatory information available.
Alternate Chemical Names