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NIOSH

CYCLOHEXENE

ICSC: 1054

Benzenetetrahydride
Hexanaphthylene
Tetrahydrobenzene
C6H10
Molecular mass: 82.14
ICSC # 1054 		CAS # 110-83-8
RTECS # GW2500000
UN # 2256
October 20, 1999 Validated

TYPES OF HAZARD/ EXPOSURE

ACUTE HAZARDS/ SYMPTOMS

PREVENTION

FIRST AID/
FIRE FIGHTING

FIRE Highly flammable.
NO open flames, NO sparks, and NO smoking.
Powder, water spray, foam, carbon dioxide.
EXPLOSION Vapour/air mixtures are explosive.
Closed system, ventilation, explosion-proof electrical equipment and lighting. Prevent build-up of electrostatic charges (e.g., by grounding). Do NOT use compressed air for filling, discharging, or handling. Use non-sparking handtools.
In case of fire: keep drums, etc., cool by spraying with water.
EXPOSURE
PREVENT GENERATION OF MISTS!

•INHALATION Cough. Drowsiness.
Ventilation, local exhaust, or breathing protection.
Fresh air, rest.
•SKIN Redness. Dry skin.
Protective gloves.
Remove contaminated clothes. Rinse and then wash skin with water and soap.
•EYES Redness.
Safety spectacles.
First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.
•INGESTION Drowsiness. Laboured breathing. Nausea.

Rinse mouth. Do NOT induce vomiting. Refer for medical attention.

SPILLAGE DISPOSAL

STORAGE

PACKAGING & LABELLING

Remove all ignition sources. Collect leaking and spilled liquid in sealable containers as far as possible. Absorb remaining liquid in sand or inert absorbent and remove to safe place. Do NOT wash away into sewer. Filter respirator for organic gases and vapours.
Fireproof. Separated from strong oxidants. Cool. Well closed. Store only if stabilized.

UN Hazard Class: 3
UN Packing Group: II
ICSC: 1054 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

CYCLOHEXENE

ICSC: 1054

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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:
The substance can form explosive peroxides. The substance may polymerize under certain conditions.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 300 ppm; (as TWA) (ACGIH 1999).
MAK: IIb (not established but data is available) (DFG 2008).
OSHA PEL: TWA 300 ppm (1015 mg/m3)
NIOSH REL: TWA 300 ppm (1015 mg/m3)
NIOSH IDLH: 2000 ppm See: 110838


ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation and by ingestion.

INHALATION RISK:
A harmful contamination of the air will be reached rather slowly on evaporation of this substance at 20°C.

EFFECTS OF SHORT-TERM EXPOSURE:
The substance irritates the eyes, the skin and the respiratory tract. Swallowing the liquid may cause aspiration into the lungs with the risk of chemical pneumonitis. The substance may cause effects on the central nervous system.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
The liquid defats the skin.

PHYSICAL
PROPERTIES

Boiling point: 83°C
Melting point: -104°C
Relative density (water = 1): 0.81
Solubility in water: none
Vapour pressure, kPa at 20°C: 8.9
Relative vapour density (air = 1): 2.8
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.16
Flash point:

-6°C c.c.
Auto-ignition temperature: 244°C
Octanol/water partition coefficient as log Pow: 2.86

ENVIRONMENTAL
DATA


N O T E S

An added stabilizer or inhibitor can influence the toxicological properties of this substance, consult an expert. Check for peroxides prior to distillation; render harmless if positive.
Transport Emergency Card: TEC (R)-30G30

NFPA Code: H 1; F 3; R 0;
Card has been partially updated in November 2008: see Occupational Exposure Limits.

ADDITIONAL INFORMATION



ICSC: 1054 CYCLOHEXENE
(C) IPCS, CEC, 1994
IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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