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DECAHYDRONAPHTHALENE (cis/trans isomer mixture)ICSC: 1548
October 2004
CAS #: 91-17-8Decalin
Perhydronaphthalene
Decahydronaphthalin
Bicyclo(4.4.0)decane
UN #: 1147
EINECS #: 202-046-9

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Flammable.  Above 57°C explosive vapour/air mixtures may be formed.  NO open flames, NO sparks and NO smoking.  Above 57°C use a closed system, ventilation and explosion-proof electrical equipment. Prevent build-up of electrostatic charges (e.g., by grounding).  Use powder, carbon dioxide, foam.  In case of fire: keep drums, etc., cool by spraying with water. 

 PREVENT GENERATION OF MISTS!  
  SYMPTOMS ACUTE HAZARDS FIRST AID
Inhalation Cough. Sore throat. Headache. Dizziness. Nausea. Vomiting.  Use ventilation, local exhaust or breathing protection.  Fresh air, rest. Refer for medical attention. 
Skin Redness. Pain. Skin burns.  Protective gloves. Protective clothing.  Remove contaminated clothes. Rinse skin with plenty of water or shower. Refer for medical attention . 
Eyes Redness. Pain. Severe deep burns.  Wear face shield or eye protection in combination with breathing protection.  First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention. 
Ingestion Nausea. Vomiting. Abdominal pain. Further see Inhalation.  Do not eat, drink, or smoke during work.  Rinse mouth. Do NOT induce vomiting. Give one or two glasses of water to drink. Refer for medical attention . 

SPILLAGE DISPOSAL CLASSIFICATION & LABELLING
Personal protection: chemical protection suit including self-contained breathing apparatus. Do NOT let this chemical enter the environment. Ventilation. Collect leaking liquid in sealable containers. Carefully collect remainder. Then store and dispose of according to local regulations. 

According to UN GHS Criteria

 

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

STORAGE
Fireproof. Separated from oxidants. Cool. Keep in the dark. Well closed. 
PACKAGING
 
DECAHYDRONAPHTHALENE (cis/trans isomer mixture) ICSC: 1548
PHYSICAL & CHEMICAL INFORMATION

Physical State; Appearance
COLOURLESS LIQUID WITH CHARACTERISTIC ODOUR. 

Physical dangers
As a result of flow, agitation, etc., electrostatic charges can be generated. 

Chemical dangers
The substance can form explosive peroxides. On combustion, forms toxic gases. Reacts with oxidants. 

Formula: C10H18
Molecular mass: 138.25
Boiling point: 185-195°C
Melting point: -40°C
Relative density (water = 1): 0.87-0.90
Solubility in water at 25°C: very poor
Vapour pressure, Pa at 20°C: 127
Relative vapour density (air = 1): 4.8
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.01
Flash point: 57°C c.c.
Auto-ignition temperature: 255°C
Explosive limits, vol% in air: 0.7-5.4
Octanol/water partition coefficient as log Pow: 4.6  


EXPOSURE & HEALTH EFFECTS

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

Effects of short-term exposure
The substance is corrosive to the skin and eyes. The vapour is irritating to the 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. 

Inhalation risk
No indication can be given about the rate at which a harmful concentration of this substance in the air is reached on evaporation at 20°C. 

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


Occupational exposure limits
MAK: 29 mg/m3, 5 ppm; peak limitation category: II(2); pregnancy risk group: D 

ENVIRONMENT
The substance is toxic to aquatic organisms. The substance may cause long-term effects in the aquatic environment. Bioaccumulation of this chemical may occur in fish. 

NOTES
Other melting points: cis-Decahydronaphthalene: -43°C, trans-Decahydronaphthalene: -30°C.
Other boiling points: cis-Decahydronaphthalene: 195°C, trans-Decahydronaphthalene: 187°C.
Check for peroxides prior to distillation; eliminate if found. 

ADDITIONAL INFORMATION
  EC Classification
 

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    See Also:
       Toxicological Abbreviations