Hexachlorocyclopentadiene

Hexachlorocyclopentadiene (HCCPD), also known as C-56, Graphlox, and HRS 1655, is an organochlorine compound with the formula C5Cl6. It is a precursor to pesticides, flame retardants, and dyes. It is a colourless liquid, although commercial samples appear lemon-yellow liquid sometimes with a bluish vapour. Many of its derivatives proved to be highly controversial, as studies showed them to be persistent organic pollutants. An estimated 270,000 tons were produced until 1976, and smaller amounts continue to be produced today. Two prominent manufacturers are Velsicol Chemical Corporation in the US and by Jiangsu Anpon Electrochemicals Co. in China.

Hexachlorocyclopentadiene
Names
IUPAC name
1,2,3,4,5,5-hexachlorocyclopenta-1,3-diene
Other names
graphlox, perchlorocyclopentadiene
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.000.937
UNII
  • InChI=1S/C5Cl6/c6-1-2(7)4(9)5(10,11)3(1)8 Y
    Key: VUNCWTMEJYMOOR-UHFFFAOYSA-N Y
  • InChI=1/C5Cl6/c6-1-2(7)4(9)5(10,11)3(1)8
    Key: VUNCWTMEJYMOOR-UHFFFAOYAM
  • ClC1(Cl)C(/Cl)=C(/Cl)\C(\Cl)=C1\Cl
Properties
C5Cl6
Molar mass 272.76 g·mol−1
Appearance Pale-yellow to amber-colored liquid
Odor Pungent, unpleasant
Density 1.702 g/cm3
Melting point −10 °C (14 °F; 263 K)
Boiling point 239 °C (462 °F; 512 K)
0.0002% (Reacts, 25°C)
Vapor pressure 0.08 mmHg
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Teratogen
Flash point 100 °C (212 °F; 373 K)
NIOSH (US health exposure limits):
PEL (Permissible)
 none
REL (Recommended)
 TWA 0.01 ppm (0.1 mg/m3)
IDLH (Immediate danger)
 N.D.
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y verify (what is YN ?)
Infobox references
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.