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Hexachlorocyclopentadiene

Hexachlorocyclopentadiene
Hexachlorocyclopentadiene
CAS No.
77-47-4
Chemical Name:
Hexachlorocyclopentadiene
Synonyms
C 56;c-56;hccp;Hccpd;hrs1655;Graphlox;HRS 1655;NCI-C55607;rcrawastenumberu130;hexachloropentadiene
CBNumber:
CB3432075
Molecular Formula:
C5Cl6
Formula Weight:
272.77
MOL File:
77-47-4.mol

Hexachlorocyclopentadiene Properties

Melting point:
−10 °C(lit.)
Boiling point:
239 °C753 mm Hg(lit.)
Density 
1.702 g/mL at 25 °C(lit.)
vapor pressure 
0.13 psi ( 20 °C)
refractive index 
n20/D 1.5644(lit.)
Flash point:
109 °C
storage temp. 
2-8°C
Stability:
Stability Stable, but light-sensitive. Non-flammable. Very reactive with alkenes and polynuclear hydrocarbons. Explosive with sodium. Incompatible with strong oxidizing agents, most common metals.
CAS DataBase Reference
77-47-4(CAS DataBase Reference)
NIST Chemistry Reference
1,3-Cyclopentadiene, 1,2,3,4,5,5-hexachloro-(77-47-4)
EPA Substance Registry System
1,3-Cyclopentadiene, 1,2,3,4,5,5-hexachloro-(77-47-4)

SAFETY

Hazard Codes  T+,N,T,F
Risk Statements  22-24-26-34-50/53-39/23/24/25-23/24/25-52/53-11
Safety Statements  23-39-45-61-60-53-25-36/37-16
RIDADR  UN 2646 6.1/PG 1
WGK Germany  3
RTECS  GY1225000
10-23
HazardClass  6.1(a)
PackingGroup  I
Hazardous Substances Data 77-47-4(Hazardous Substances Data)

Hexachlorocyclopentadiene price

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Hexachlorocyclopentadiene Chemical Properties,Uses,Production

Description

Hexachlorocyclopentadiene is a pale-yellow/lemon-yellow liquid with a characteristic musty or pungent odour (odour threshold – 0.03 ppm). Hexachlorocyclopentadiene does not occur naturally but is a manufactured chemical. It easily evaporates into the air. Hexachlorocyclopentadiene is the key intermediate in the manufacture of some pesticides, including heptachlor, chlordane, aldrin, dieldrin, and endrin. Hexachlorocyclopentadiene is also used in the manufacture of flame retardants and some resins, shock-proof plastics, fluorocarbons, and dyes. Hexachlorocyclopentadiene quickly breaks down by sunlight and reacts with other chemicals in the air.

Chemical Properties

pale yellow liquid

Uses

Environmental neurotoxicant. Used in the preparation of some insecticides, flame retardants, and resins.

General Description

A pale yellow liquid with a pungent odor. Density 14.3 lb /gal. Solidifies at 50°F. Insoluble in water. Noncombustible. Very toxic by skin absorption and inhalation. Corrosive to tissue.

Air & Water Reactions

Insoluble in water. Reacts slowly with water to form hydrochloric acid.

Reactivity Profile

Hexachlorocyclopentadiene is incompatible with strong oxidizing and reducing agents. Also incompatible with many amines, nitrides, azo/diazo compounds, alkali metals (sodium), and epoxides.

Health Hazard

Hexachlorocyclopentadiene is very toxic and may be fatal if inhaled, swallowed, or absorbed through the skin. The probable human lethal dose is 50-500 mg/kg, or between 1 teaspoon and 1 ounce for a 150 lb. (70 kg) person. Severe exposure induces pulmonary hyperemia and edema, degenerative and necrotic changes in brain, heart and adrenal glands and necrosis of liver and kidney tubules.

Fire Hazard

Toxic hydrogen chloride, chlorine, and phosgene gases may form in fires. In presence of moisture, will corrode iron and other materials; flammable and explosive hydrogen gas may collect in enclosed space. Will corrode iron and other metals in the presence of moisture. Reacts slowly with water to form hydrochloric acid; however, the reaction is not hazardous. Hazardous polymerization may not occur.

Purification Methods

Dry the diene with MgSO4, filter, and distil it under vacuum in a nitrogen atmosphere. Irritates skin and eyes, HIGHLY TOXIC. [McBee et al. J Am Chem Soc 77 4378 1955, UV spectra: Idol et al. J Org Chem 20 1746 1955, Beilstein 5 III 308, 5 IV 381.]

Hexachlorocyclopentadiene Preparation Products And Raw materials

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