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DECAHYDRONAPHTHALENE (cis/trans isomer mixture) ICSC: 1548
Date of Peer Review: October 2004

Decalin
Perhydronaphthalene
Decahydronaphthalin
Bicyclo(4.4.0)decane
CAS # 91-17-8 C10H18
RTECS # QJ3150000 Molecular mass: 138.25
UN # 1147
EC Index #
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Flammable.
NO open flames, NO sparks, and NO smoking.
Powder, carbon dioxide, foam.
EXPLOSION Above 57C explosive vapour/air mixtures may be formed.
Above 57C use a closed system, ventilation, and explosion-proof electrical equipment. Prevent build-up of electrostatic charges (e.g., by grounding).
In case of fire: keep drums, etc., cool by spraying with water.
EXPOSURE
PREVENT GENERATION OF MISTS!

Inhalation Cough. Sore throat. Headache. Dizziness. Nausea. Vomiting.
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.
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 take to a doctor.
Ingestion Nausea. Vomiting. Abdominal pain. (Further see Inhalation).
Do not eat, drink, or smoke during work.
Rinse mouth. Do NOT induce vomiting. Give plenty of water to drink. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Ventilation. Collect leaking liquid in sealable containers. Carefully collect remainder, then remove to safe place. Personal protection: chemical protection suit including self-contained breathing apparatus. Do NOT let this chemical enter the environment.
EU Classification
UN Classification
UN Hazard Class: 3
UN Pack Group: III
EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-30GF1-III
NFPA Code: H2; F2; R0;
Fireproof. Separated from oxidants. Cool. Keep in the dark. Well closed to reduce the rate of peroxide formation.
IPCS
International
Programme on
Chemical Safety
Prepared in the context of cooperation between the International Programme on Chemical Safety and the Commission of the European Communities IPCS, CEC 2005

SEE IMPORTANT INFORMATION ON BACK
DECAHYDRONAPHTHALENE (cis/trans isomer mixture) ICSC: 1548
IMPORTANT DATA
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.

OCCUPATIONAL EXPOSURE LIMITS:
TLV not established.
MAK not established.
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation of its vapour.

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

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is corrosive to the skin and the 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.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
Repeated or prolonged contact with skin may cause dermatitis.
PHYSICAL PROPERTIES
Boiling point: 185-195C
Melting point: -40C
Relative density (water = 1): 0.87 - 0.90
Solubility in water, g/100 ml at 25C: very poor
Vapour pressure, Pa at 20C: 127
Relative vapour density (air = 1): 4.8
Relative density of the vapour/air-mixture at 20C (air = 1): 1.01
Flash point: 57C c.c.
Auto-ignition temperature: 255C
Explosive limits, vol% in air: 0.7-5.4
Octanol/water partition coefficient as log Pow: 4.6
ENVIRONMENTAL DATA
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: -43C, trans-Decahydronaphthalene: -30C. Other boiling points: cis-Decahydronaphthalene: 195C, trans-Decahydronaphthalene: 187C. Check for peroxides prior to distillation; eliminate if found.
ADDITIONAL INFORMATION


LEGAL NOTICE Neither the CEC nor the IPCS nor any person acting on behalf of the CEC or the IPCS is responsible for the use which might be made of this information
IPCS, CEC 2005