Pentachlorodibenzo-p-dioxin

  • Pentachlorodibenzodioxin
  • Pentachloroibenzo(b,e)(1,4)dioxin
  • PCDD
Formula
C12H3Cl5O2
Structure
Description
Polychlorinated dibenzo-p-dioxins occur as 75 different isomers. There are 14 possible pentachlorodibenzo-p-dioxin isomers.

Registry Numbers and Inventories.
CAS
36088-22-9
26 37/39

Properties.
Formula
C12H3Cl5O2
Formula mass
506.26
Melting point, °C
320
Vapor pressure, mmHg
5.6E-10 (25 C)
Solubility in water
0.12 ug/L at 20 C
Partition coefficient, pKow
4.84

Hazards and Protection.
Small spills/leaks
Recycle any unused portion of the material for its approved use or return it to the manufacturer or supplier.

Fire.
Combustion products
Dioxins may be formed during the combustion of PCBs in fires and explosions.

Health.
Exposure effects
   Ingestion
See inhalation.
   Inhalation
Probable human carcinogen. Aesthenia, headaches, and pain in the extremities, peripheral neuropathy, ulcers, altered liver function, enzyme induction, altered lipid metabolism, and abnormal urinary
   Skin
Acute manifestation of toxicity that has been shown in humans is chloracne, an acne-like condition that takes months or years to disappear.
   Eyes
Irritation.

First aid
 
   Ingestion
Administer activated charcoal if available. Ipecac-induced vomiting may be useful for initial treatment at the scene (eg, children at home) if it can be given within a few minutes of exposure.
   Inhalation
Remove victims from exposure and give supplemental oxygen if available.
   Skin
Immediately remove the material as quickly as possible to prevent additional absorption of the compounds. Remove contaminated clothing and wash.
   Eyes
Irrigate for at least 15 minutes with water.

Transport.