Percutaneous toxicity of hexachlorobutadiene

Area of Science:

• Toxicology
• Dermatology
• Nephrology

Background:

• Hexachlorobutadiene is an industrial solvent with known toxicity.
• Previous studies established its toxicity via oral and intraperitoneal routes.

Purpose of the Study:

• To investigate the toxicological effects of epicutaneous hexachlorobutadiene exposure in rabbits.
• To determine the LD50 and characterize systemic damage following skin absorption.

Main Methods:

• Rabbits were exposed epicutaneously to varying doses of hexachlorobutadiene (0.25-1.00 ml/kg) for 8 hours.
• Lethal dose 50 (LD50) was calculated using Bliss' method.
• Histopathological examination assessed cutaneous and systemic lesions.

Main Results:

• Hexachlorobutadiene was fully absorbed through the skin, causing local necrosis.
• Systemic effects included fatty liver degeneration and necrotizing nephritis.
• The LD50 was determined to be 0.72 ml/kg.
• Observed lesions were found to be reversible.

Conclusions:

• Epicutaneous exposure to hexachlorobutadiene induces significant local and systemic toxicity in rabbits.
• Hexachlorobutadiene is confirmed as a highly nephrotoxic aliphatic chlorinated hydrocarbon.
• The reversibility of lesions suggests potential for recovery after exposure cessation.