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HEXACHLOROCYCLOPENTADIENE ICSC: 1096
Date of Peer Review: October 2005

1,2,3,4,5,5-Hexachloro-1,3-cyclopentadiene
Perchlorocyclopentadiene
CAS # 77-47-4 C5Cl6
RTECS # GY1225000 Molecular mass: 272.7
UN # 2646
EC Index # 602-078-00-7
TYPES OF HAZARD / EXPOSURE ACUTE HAZARDS / SYMPTOMS PREVENTION FIRST AID / FIRE FIGHTING
FIRE Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.

In case of fire in the surroundings: use appropriate extinguishing media.
EXPLOSION


EXPOSURE
AVOID ALL CONTACT!
IN ALL CASES CONSULT A DOCTOR!
Inhalation Cough. Sore throat. Headache. Diarrhoea. Dizziness. Nausea. Vomiting. Laboured breathing.
Ventilation, local exhaust, or breathing protection.
Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer for medical attention.
Skin MAY BE ABSORBED! 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. Blurred vision. 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 Abdominal pain. Burning sensation. Shock or collapse. (Further see Inhalation).
Do not eat, drink, or smoke during work. Wash hands before eating.
Rinse mouth. Do NOT induce vomiting. Give plenty of water to drink. Refer for medical attention.
SPILLAGE DISPOSAL PACKAGING & LABELLING
Personal protection: chemical protection suit including self-contained breathing apparatus. Do NOT let this chemical enter the environment. Collect leaking liquid in sealable plastic containers. Absorb remaining liquid in sand or inert absorbent and remove to safe place.
EU Classification
Symbol: T+, N
R: 22-24-26-34-50/53
S: (1/2-)-25-39-45-53-60-61
UN Classification
UN Hazard Class: 6.1
UN Pack Group: I
EMERGENCY RESPONSE STORAGE
Transport Emergency Card: TEC (R)-61S2646 or 61GT1-I
Store in an area without drain or sewer access. Dry. Well closed. Ventilation along the floor.
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
HEXACHLOROCYCLOPENTADIENE ICSC: 1096
IMPORTANT DATA
PHYSICAL STATE; APPEARANCE:
OILY YELLOW TO GREEN LIQUID, WITH PUNGENT ODOUR.

PHYSICAL DANGERS:
The vapour is heavier than air.

CHEMICAL DANGERS:
The substance decomposes on heating producing toxic and corrosive fumes including hydrogen chloride and phosgene. Reacts with moist air to produce hydrogen chloride (see ICSC0163). Attacks many metals forming flammable/explosive gas (hydrogen - see ICSC 0001) in the presence of water.

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 0.01 ppm as TWA; A4 (not classifiable as a human carcinogen); (ACGIH 2005).
MAK: IIb (not established but data is available); skin absorption (H); (DFG 2005).
ROUTES OF EXPOSURE:
The substance can be absorbed into the body by inhalation, through the skin and by ingestion.

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

EFFECTS OF SHORT-TERM EXPOSURE:
The substance is corrosive to the eyes, the skin and the respiratory tract. Corrosive on ingestion. Inhalation of the substance may cause lung oedema (see Notes). The substance may cause effects on the kidneys and liver, resulting in tissue lesions. The effects may be delayed. Medical observation is indicated.

PHYSICAL PROPERTIES
Boiling point: 239C
Melting point: -9C
Relative density (water = 1): 1.7
Solubility in water, g/100 ml at 25C: 0.2
Vapour pressure, Pa at 20C: 10.7
Relative vapour density (air = 1): 9.4
Relative density of the vapour/air-mixture at 20C (air = 1): 1.00
Octanol/water partition coefficient as log Pow: 4-5
ENVIRONMENTAL DATA
The substance is very toxic to aquatic organisms. Bioaccumulation of this chemical may occur in fish. The substance may cause long-term effects in the aquatic environment.
NOTES
The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation is therefore essential. Immediate administration of an appropriate inhalation therapy by a doctor or a person authorized by him/her, should be considered.
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