Pentac

  • bis(pentachlor-2,4-cyclopentadien-1-yl)
  • bis(pentachlorocyclopentadienyl)
  • bis(Pentachloro-2,4-cyclopentadien-1-yl)
  • Decachlor
  • 1,1'2,2'3,3'4,4'5,5'-Decachlorobi-2,4-cyclopentadien-1-yl
  • Decachlorobi-2,4-cyclopentadien-1-yl
Formula
C10Cl10
Structure
Description
Tan crystalline solid.
Uses
Acaricide on greenhouse and ornamental crops.

Registry Numbers and Inventories.
CAS
2227-17-0
EC (EINECS/ELINCS)
218-763-5
RTECS
DT8225000
RTECS class
Agricultural Chemical and Pesticide; Mutagen; Primary Irritant
Merck
12,3154
Beilstein/Gmelin
2064747
Beilstein Reference
4-05-00-01542
EPA OPP
27501
Swiss Giftliste 1
G-4497

Properties.
Formula
C10Cl10
Formula mass
474.64
Melting point, °C
125
Boiling point, °C
456
Decomposition point, °C
250
Vapor pressure, mmHg
5E-8 (25 C)
Density
1.94 g/cm3
Solubility in water
Insoluble
Partition coefficient, pKow
7.88
Heat of vaporization
68.9 kJ/mol

Hazards and Protection.
Storage
Store in original container in a dry place separate from reducing agents.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Chemical splash goggles in compliance with OSHA regulations are advised; however, OSHA regulations also permit other type safety glasses. Whre chemical resistant gloves. To prevent repeated or prolonged skin contact, wear impervious clothing and boots.
Respirators
Use NIOSH/MSHA approved respirator appropriate for exposure of concern.
Small spills/leaks
Evacuate area and ventilate. Wear protective equipment. If required, use an inert absrobent. Sweep up and place in an appropriate container for disposal. Wash contaminated surfaces.
Stability
Stable for minimum of 2 years with normal storage it is stable in acid and alkaline media, but is decomposed by direct sunlight or at temperatures > 130 C.
Incompatibilities
Strong oxidizing agents.

Fire.
Flash Point,°C
188
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use agent most appropriate to extinguish fire.

Health.
Poison_Class
4
Exposure effects
CNS excitation, seizures, tremor, ataxia, agitation, nervousness, and amnesia may occur. Kelthane, perthane, methoxychlor, and hexachlorobenzene have little CNS toxicity; in extreme overdose CNS depression may occur. Organochlorine pesticides such as DDT pass through the placenta, with an average level in the newborn blood reaching around a third of that in maternal blood. They can also be found in breast milk. Excessive absorption of kepone (chlordecone) has depressed sperm counts and sperm motility in exposed workers.
   Ingestion
Nausea, vomiting, and diarrhea may follow ingestion.
   Inhalation
Aspiration of insecticide containing petroleum distillate may result in pneumonitis.
   Skin
Extensive contact results in dermal irritation.

First aid
 
   Ingestion
Seek medical attention. If individual is drowsy or unconscious, do not give anything by mouth; place individual on the left side with the head down. Contact a physician, medical facility, or poison control center for advice about whether to induce vomiting. If possible, do not leave individual unattended.
   Inhalation
If symptoms develop, move individual away from exposure and into fresh air. If symptoms persist, seek medical attention. If breathing is difficult, administer oxygen. Keep person warm and quiet; seek immediate medical attention.
   Skin
Remove contaminated clothing. Wash skin and hair thoroughly; do two soap and water washings. Leather absorbs pesticides. Hence, leather should not be worn in the presence of pesticides and all contaminated leather should be discarded.
   Eyes
Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.

Transport.
USCG CHRIS Code
CLF
 
36 Halogenated hydrocarbons