Methylcyclohexane

  • Cyclohexylmethane
  • Hexahydrotoluene
Formula
C6H11CH3
Structure
Description
Colorless liquid with a faint benzene-like odor.
Uses
Used commercially as a solvent for cellulose derivatives particularly with othersolvents, and as an organic intermediate in organic synthesis. It is one of the components found in jet fuel.

Registry Numbers and Inventories.
CAS
108-87-2
EC (EINECS/ELINCS)
203-624-3
EC Index Number
601-018-00-7
EC Class
Highly flammable; Harmful; Irritant; Vapours may cause drowsiness and dizziness; Dangerous for the Environment
R 11 38 51/53 65 67
S 9 16 33 61 62
RTECS
GV6125000
RTECS class
Primary Irritant
UN (DOT)
2296
Merck
12,10412
Beilstein/Gmelin
505972
Beilstein Reference
4-05-00-00094
Swiss Giftliste 1
G-2445
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C7H14
Formula mass
98.19
Melting point, °C
-126
Boiling point, °C
101
Vapor pressure, mmHg
49 (25 C)
Vapor density (air=1)
3.4
Saturation Concentration
47400 ppm (4.74%) at 20 C; 56600 ppm (5.66%) at 25 C (calc.)
Odor Threshold Odor threshold 630 ug/L
Critical temperature
299
Critical pressure
34.3
Density
0.7693 g/cm3 (20 C)
Solubility in water
Insoluble
Viscosity
0.734 cp (20 C)
Surface tension
23.82 g/s2 (20 C)
Refractive index
1.41705 (20 C)
Partition coefficient, pKow
3.61
Heat of fusion
6.8 kJ/mol
Heat of vaporization
31.3 kJ/mol
Heat of combustion
-4565 kJ/mol

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Keep from contact with oxidizing materials. Store in a cool, dry, well-ventilated area away from incompatible substances. Flammables-area. Store protected from moisture.
B2
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 skin and eyes. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. 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 minimize contact with skin.
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. Avoid runoff into storm sewers and ditches which lead to waterways. 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.
Disposal code
1
Stability
Stable at room temperature in closed containers under normal storage and handling conditions.
Incompatibilities
Moisture, strong acids, strong bases, strong oxidizing agents.
Decomposition
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Fire.
Flash Point,°C
-4
Autoignition, °C
260
Upper exp. limit, %
6.7
Lower exp. limit, %
1.1
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Can release vapors that form explosive mixtures at temperatures above the flashpoint. Use water spray to keep fire-exposed containers cool. Water may be ineffective. Material is lighter than water and a fire may be spread by the use of water. Containers may explode in the heat of a fire. May polymerize explosively when involved in a fire. Extinguishing media: Use water spray to cool fire-exposed containers. Water may be ineffective. Do NOT use straight streams of water. For small fires, use dry chemical, carbon dioxide, water spray or regular foam. For large fires, use water spray, fog or regular foam.
Fire potential
Dangerous fire hazard when exposed to heat, flame, or oxidizers
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
Vapor may travel considerable distance to a source of ignition and flashback containing explosion may occur during fire conditions.
Health
1
 
Flammability
3
 
 
Reactivity
0
 

Health.
Exposure limit(s)
TLV: 400 ppm; 1610 mg/m3 (ACGIH 1996). OSHA PEL: TWA 500 ppm (2000 mg/m3) NIOSH REL: TWA 400 ppm (1600 mg/m3) NIOSH IDLH: 1200 ppm LEL
Poison_Class
4
Exposure effects
Prolonged or repeated skin contact may cause defatting and dermatitis.
   Ingestion
May cause central nervous system depression, kidney damage, and liver damage. May cause gastrointestinal irritation with nausea, vomiting and diarrhea.
   Inhalation
May cause respiratory tract irritation. May cause effects similar to those described for ingestion. Aspiration may lead to pulmonary edema. Vapors may cause dizziness or suffocation. May cause burning sensation in the chest.
   Skin
Causes skin irritation. Prolonged and/or repeated contact may cause defatting of the skin and dermatitis. Skin contact may cause thickening of the skin and ulceration. May cause cyanosis of the extremities.
   Eyes
May cause mild eye irritation. May cause chemical conjunctivitis and corneal damage.

First aid
 
   Ingestion
Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. 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. DO NOT use mouth-to-mouth respiration. If breathing has ceased apply artificial respiration using oxygen and a suitable mechanical device such as a bag and a mask.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.
   Eyes
Immediately 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
2296
Response guide
Hazard class
3
Packing Group
II
 
USCG CHRIS Code
MCY
 
HS Code
2902 19 90
 
Std. Transport #
4909330
 
IMO Chemical Code
17
IMO Pollution Category
C
IMO Hazard code
P