Rust itself isn't toxic. But the fact that the clothes peg is rusted indicates it has went through usage and conditions that could potentially include toxic substances, eg. detergents and/or dirty clothing. The plastic of the clothes peg is itself more toxic when boiled in soup than the rust.
Rust itself isn't toxic. But the fact that the clothes peg is rusted indicates it has went through usage and conditions that could potentially include toxic substances, eg. detergents and/or dirty clothing.