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Chemical Datasheet

ISOHEXANE

3 - Flammable liquid

Chemical Identifiers

CAS Number UN/NA Number DOT Hazard Label USCG CHRIS Code
  • 107-83-5   (ISOHEXANE)
  • 1208
  • Flammable Liquid
  • IHA
NIOSH Pocket Guide International Chem Safety Card
none
  • 2-METHYLPENTANE
NFPA 704
Diamond Hazard Value Description
3
1 0
Blue Health 1 Can cause significant irritation.
Red Flammability 3 Can be ignited under almost all ambient temperature conditions.
Yellow Instability 0 Normally stable, even under fire conditions.
White Special
(NFPA, 2010)
General Description
Watery liquid with a gasoline-like odor, Floats on water. Produces an irritating vapor. (USCG, 1999)

Hazards

Reactivity Alerts
Air & Water Reactions
Highly flammable.
Fire Hazard
Excerpt from 128 Polymerizable warning [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 the ground and collect in low or confined areas (sewers, basements, tanks, etc.). 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 will float on water. Substance may be transported hot. For hybrid vehicles, 147 Polymerizable warning (lithium ion batteries) or 138 Polymerizable warning (sodium batteries) should also be consulted. If molten aluminum is involved, refer to 169 Polymerizable warning. (ERG, 2020)
Health Hazard
Inhalation 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 Profile
Saturated aliphatic hydrocarbons, such as ISOHEXANE, 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)
Potentially Incompatible Absorbents

No information available.

Response Recommendations

Isolation and Evacuation
Excerpt from 128 Polymerizable warning [Flammable Liquids (Water-Immiscible)]:

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, 2020)
Firefighting
Fire Extinguishing Agents Not to Be Used: Water may be ineffective

Fire Extinguishing Agents: Foam, carbon dioxide, or dry chemical (USCG, 1999)
Non-Fire Response
Excerpt from 128 Polymerizable warning [Flammable Liquids (Water-Immiscible)]:

ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from 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, 2020)
Protective Clothing
Eye protection (as for gasoline). (USCG, 1999)
DuPont Tychem® Suit Fabrics
No information available.
First Aid
INHALATION: 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

Chemical Formula:
  • C6H14
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 mmHg (USCG, 1999)
Vapor Density (Relative to Air): data unavailable
Specific Gravity: 0.653 at 68°F (USCG, 1999) - Less dense than water; will float
Boiling Point: 140.5°F at 760 mmHg (USCG, 1999)
Molecular Weight: 86.18 (USCG, 1999)
Water Solubility: data unavailable
Ionization Energy/Potential: data unavailable
IDLH: 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 2-flame icon indicates value is 50-99% of LEL. 66000 ppm 3-flame icon indicates value is 100% or more of LEL. LEL = 12000 ppm
2-flame icon indicates value is 50-99% of LEL.
3-flame icon indicates value is 100% or more of LEL.
(DOE, 2018)

Regulatory Information

EPA Consolidated List of Lists

No regulatory information available.

CISA Chemical Facility Anti-Terrorism Standards (CFATS)

No regulatory information available.

OSHA Process Safety Management (PSM) Standard List

No regulatory information available.

Alternate Chemical Names