Cyclohexene

  • 1,2,3,4-Tetrahydrobenzene
  • Benzene tetrahydride
Formula
C6H10
Structure
Description
Colorless liquid with a sweet odor.
Uses
Alkylation component, in manufacture of adipic acid, maleic acid, hexahydrobenzoic acid & aldehyde.

Registry Numbers and Inventories.
CAS
110-83-8
EC (EINECS/ELINCS)
203-807-8
EC Class
highly flammable, harmful
R 11 22 65
S 16 33 36/37 62
RTECS
GW2500000
RTECS class
Other
UN (DOT)
2256
Merck
13,2756
Beilstein/Gmelin
906737
Beilstein Reference
4-05-00-00218
Swiss Giftliste 1
G-1459
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C6H10
Formula mass
82.15
Melting point, °C
-104
Boiling point, °C
83
Vapor pressure, mmHg
89 (25 C)
Vapor density (air=1)
2.8
Saturation Concentration
88172 ppm (8.8%) at 20 C (calculated)
Critical temperature
287
Critical pressure
48.41
Density
0.8299 g/cm3 (0 C)
Solubility in water
Insoluble
Viscosity
0.67 cp (19.9 C)
Surface tension
26.56 g/s2
Refractive index
1.44605 (15 C)
Partition coefficient, pKow
2.86
Heat of fusion
3.3 kJ/mol
Heat of vaporization
29.04 kJ/mol
Heat of combustion
-3752 kJ/mol

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Do not store in direct sunlight. Store in a tightly closed container. Keep from contact with oxidizing materials. Store in a cool, dry, well-ventilated area away from incompatible substances.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Ground and bond containers when transferring material. Use spark-proof tools and explosion proof equipment. Avoid contact with eyes, skin, and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Avoid contact with heat, sparks and flame. Avoid ingestion and inhalation. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
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. Clean up spills immediately, using the appropriate protective equipment. Remove all sources of ignition. Use a spark-proof tool. Provide ventilation. A vapor suppressing foam may be used to reduce vapors. Water spray may reduce vapor but may not prevent ignition in closed spaces.
Disposal code
1
Stability
Stable under normal shipping and handling conditions. Explosive peroxides may form on concentration.
Incompatibilities
Oxidizing agents and acids..
Decomposition
Carbon monoxide, carbon dioxide.

Fire.
Flash Point,°C
-17
Autoignition, °C
310
Upper exp. limit, %
7.7
Lower exp. limit, %
1.2
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Use water spray to keep fire-exposed containers cool. Extremely flammable liquid. Vapor may cause flash fire. Water may be ineffective. Material is lighter than water and a fire may be spread by the use of water. Will be easily ignited by heat, sparks or flame. Containers may explode if exposed to fire. Extinguishing media: For small fires, use dry chemical, carbon dioxide, water spray or alcohol-resistant foam. Use water spray to cool fire-exposed containers. Water may be ineffective. This material is lighter than water and insoluble in water. The fire could easily be spread by the use of water in an area where the water cannot be contained.
Fire potential
HIGHLY FLAMMABLE.
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. 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.
Combustion products
Fire will produce irritating, corrosive and/or toxic gases.
Health
1
 
Flammability
3
 
 
Reactivity
0
 

Health.
Exposure limit(s)
TLV: 300 ppm; 1010 mg/m3 (as TWA) (ACGIH 1992-1993). OSHA PEL: TWA 300 ppm (1015 mg/m3) NIOSH REL: TWA 300 ppm (1015 mg/m3) NIOSH IDLH: 2000 ppm
Poison_Class
4
Exposure effects
Prolonged or repeated skin contact may cause defatting and dermatitis.
   Ingestion
May cause irritation of the digestive tract. May cause central nervous system depression, characterized by excitement, followed by headache, dizziness, drowsiness, and nausea. Advanced stages may cause collapse, unconsciousness, coma and possible death due to respiratory failure. May be harmful if swallowed.
   Inhalation
Inhalation of high concentrations may cause central nervous system effects characterized by headache, dizziness, unconsciousness and coma. Causes respiratory tract irritation.
   Skin
Causes skin irritation.
   Eyes
Causes eye irritation.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
2256
Response guide
Hazard class
3
Packing Group
II
 
USCG CHRIS Code
CYH
 
HS Code
2902 19 90
 
Std. Transport #
4909212