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CYCLOHEXANEICSC: 0242
Hexahydrobenzene
Hexamethylene
Hexanaphthene
June 2011
CAS #: 110-82-7
UN #: 1145
EC Number: 203-806-2

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Highly flammable.  Vapour/air mixtures are explosive. Heating will cause rise in pressure with risk of bursting.  NO open flames, NO sparks and NO smoking.  Closed system, ventilation, explosion-proof electrical equipment and lighting. Do NOT use compressed air for filling, discharging, or handling. Use non-sparking handtools. Prevent build-up of electrostatic charges (e.g., by grounding).  Use water spray, foam, powder, carbon dioxide. Water may be ineffective.  In case of fire: keep drums, etc., cool by spraying with water. 

 PREVENT GENERATION OF MISTS!  
  SYMPTOMS PREVENTION FIRST AID
Inhalation Cough. Nausea. Headache. Dizziness. Weakness. Drowsiness.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Refer for medical attention. 
Skin Redness. Dry skin.  Protective gloves.  Remove contaminated clothes. Rinse and then wash skin with water and soap. 
Eyes Redness.  Wear safety goggles or eye protection in combination with breathing protection.  Rinse with plenty of water (remove contact lenses if easily possible). 
Ingestion Abdominal pain. Nausea. Vomiting. Aspiration hazard! Further see Inhalation.  Do not eat, drink, or smoke during work.  Rinse mouth. Do NOT induce vomiting. Refer immediately for medical attention. 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Evacuate danger area! Consult an expert! Remove all ignition sources. Personal protection: self-contained breathing apparatus. Ventilation. Do NOT let this chemical enter the environment. Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in sand or inert absorbent. Then store and dispose of according to local regulations. Do NOT wash away into sewer. 

According to UN GHS Criteria

flam;flameexcl mark;warncancer;health hazenviro;aqua
DANGER
Highly flammable liquid and vapour
Causes eye irritation
Causes mild skin irritation
May cause drowsiness and dizziness
May be fatal if swallowed and enters airways
Very toxic to aquatic life with long lasting effects 

Transportation
UN Classification
UN Hazard Class: 3; UN Pack Group: II 

STORAGE
Fireproof. Provision to contain effluent from fire extinguishing. Separated from strong oxidants. Store in an area without drain or sewer access. 
PACKAGING
 
CYCLOHEXANE ICSC: 0242
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS LIQUID WITH CHARACTERISTIC ODOUR. 

Physical dangers
The vapour is heavier than air and may travel along the ground; distant ignition possible. As a result of flow, agitation, etc., electrostatic charges can be generated. 

Chemical dangers
Heating may cause violent combustion or explosion. Reacts with strong oxidants. 

Formula: C6H12
Molecular mass: 84.2
Boiling point: 81°C
Melting point: 7°C
Relative density (water = 1): 0.8
Solubility in water, g/100ml at 25°C: 0.0058 (very poor)
Vapour pressure, kPa at 20°C: 10.3
Relative vapour density (air = 1): 2.9
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.2
Flash point: -18°C c.c.
Auto-ignition temperature: 260°C
Explosive limits, vol% in air: 1.3-8.4
Octanol/water partition coefficient as log Pow: 3.4
Viscosity: 1.26x10-6 mm²/s at 26°C 


EXPOSURE & HEALTH EFFECTS

Routes of exposure
The substance can be absorbed into the body by inhalation of its vapour and by ingestion. 

Effects of short-term exposure
The substance is mildly irritating to the eyes, skin and respiratory tract. The substance may cause effects on the central nervous system. If this liquid is swallowed, aspiration into the lungs may result in chemical pneumonitis. Exposure could cause lowering of consciousness. 

Inhalation risk
A harmful contamination of the air can be reached rather quickly on evaporation of this substance at 20°C. 

Effects of long-term or repeated exposure
Repeated or prolonged contact with skin may cause dryness and cracking and dermatitis. 


OCCUPATIONAL EXPOSURE LIMITS
TLV: 100 ppm as TWA.
MAK: 700 mg/m3, 200 ppm; peak limitation category: II(4); pregnancy risk group: D.
EU-OEL: 700 mg/m3, 200 ppm as TWA 

ENVIRONMENT
The substance is very toxic to aquatic organisms. The substance may cause long-term effects in the aquatic environment. It is strongly advised not to let the chemical enter into the environment. 

NOTES
The odour warning when the exposure limit value is exceeded is insufficient. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: F, Xn, N; R: 11-38-65-67-50/53; S: (2)-9-16-25-33-60-61-62; Note: 4 

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    See Also:
       Toxicological Abbreviations
       CYCLOHEXANE (JECFA Evaluation)