Heptachlorodibenzo-p-dioxin

Heptachlorodibenzo-p-dioxin (HpCDD) is a chemical compound that belongs to the group of polychlorinated dibenzo-p-dioxins (PCDDs). It is a highly toxic and persistent organic pollutant that can have serious health effects on humans and wildlife.

Chemical Structure and Properties

Heptachlorodibenzo-p-dioxin is a polychlorinated dibenzo-p-dioxin with seven chlorine atoms. The chemical formula of HpCDD is C12HCl7O2. It is a colorless, crystalline solid that is not soluble in water but is soluble in organic solvents. It is highly stable and resistant to degradation, which makes it a persistent environmental pollutant.

Sources and Environmental Impact

Heptachlorodibenzo-p-dioxin is not produced intentionally but is a byproduct of various industrial processes, including the production of chlorine and pesticides, and the incineration of waste. It can also be formed during natural processes such as forest fires. Once released into the environment, HpCDD can be transported long distances and can accumulate in the food chain, posing a risk to human health and the environment.

Health Effects

Exposure to heptachlorodibenzo-p-dioxin can have serious health effects. It is classified as a carcinogen by the International Agency for Research on Cancer (IARC) and can also cause reproductive and developmental problems, damage the immune system, interfere with hormones, and cause other health effects.

Regulation and Remediation

Due to its toxicity and persistence, the production and use of HpCDD are regulated by international agreements such as the Stockholm Convention on Persistent Organic Pollutants. Remediation of contaminated sites often involves the use of advanced technologies such as thermal desorption or incineration.

See Also

• Dioxin
• Polychlorinated dibenzofurans
• Persistent organic pollutant
• Stockholm Convention on Persistent Organic Pollutants