Overview
Chlordane is an organochlorine compound that was widely used as a pesticide from the 1940s to the 1980s. It belongs to the cyclodiene group of chlorinated hydrocarbons and was primarily employed for termite control and agricultural pest management. Due to its persistence in the environment and potential health risks, its use has been heavily restricted or banned in many countries under the Stockholm Convention on Persistent Organic Pollutants. As a technical-grade product, chlordane typically consists of a mixture of related compounds, including cis- and trans-chlordane, heptachlor, and nonachlor. Its effectiveness against termites and soil insects made it popular for decades, but growing awareness of its environmental and health impacts led to its phase-out in most developed nations by the 1990s.
Physical and Chemical Properties
Chlordane presents as a viscous liquid ranging from colorless to amber in appearance. With a high chlorine content (approximately 69% by weight), it exhibits typical organochlorine characteristics including chemical stability and resistance to degradation. The compound has low water solubility but readily dissolves in most organic solvents, fats, and oils. The substance demonstrates moderate volatility at room temperature, though less so than some other organochlorine pesticides. Its stability contributes to environmental persistence, with a half-life in soil ranging from several months to years depending on conditions. Chlordane undergoes photochemical degradation slowly when exposed to sunlight, breaking down into various metabolites including oxychlordane and heptachlor epoxide.
Main Applications
Historically, chlordane found extensive use as a broad-spectrum insecticide in agricultural settings, particularly for soil-dwelling pests affecting corn, potatoes, and other crops. Its most significant application was in termite control, where it served as a long-lasting soil treatment around building foundations. The chemical's persistence provided protection for 10-20 years in some cases. Other applications included use in home gardens, turf management, and as a wood preservative. In veterinary medicine, chlordane was sometimes employed to control ectoparasites on livestock. However, most of these uses have been discontinued globally due to environmental concerns, with remaining applications typically limited to specific public health emergencies under strict regulatory oversight.
Safety and Storage
Chlordane presents significant health hazards, being classified as a possible human carcinogen by IARC. Exposure routes include inhalation, ingestion, and dermal absorption. Acute exposure can affect the nervous system, while chronic exposure may impact the liver and reproductive system. Proper personal protective equipment (PPE) including chemical-resistant gloves and respirators is essential when handling this substance. Storage requires airtight containers made of materials resistant to organochlorine compounds, kept in cool (below 30°C), well-ventilated areas separate from food and feed. Secondary containment is recommended to prevent environmental contamination in case of leaks. Given its restricted status in most jurisdictions, storage and handling must comply with local hazardous materials regulations, often requiring special permits and documentation.
B2B Procurement Guide
Due to global restrictions under the Stockholm Convention, legal procurement of chlordane is extremely limited. Businesses requiring this chemical for approved purposes must navigate complex regulatory frameworks. Essential steps include verifying the legal status in both the source and destination countries, obtaining necessary permits, and ensuring proper documentation for international shipments if applicable. Buyers should conduct thorough due diligence on suppliers to confirm compliance with environmental regulations. Alternative pest control products should be considered where possible. For research or specialized applications where chlordane is permitted, procurement quantities should be minimized to reduce storage risks and disposal challenges. Working with specialized chemical distributors familiar with restricted substances is advisable.
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