Does Delrin Leach

Probably, some chemical permeated into the Delrin (acetal polymer) and leaches out into the gel. This material is not recommended for bleach solutions. Try boiling in DI water to leach out the chemical, and use hot DI for future sterilizations.

At what temperature does Delrin release formaldehyde?

If heated to temperatures over 230 C (446 °F), the polymer releases formaldehyde. Formaldehyde may cause skin, eye, and respiratory irritation and allergic reactions. There are no known human health effects aggravated by exposure to this product.

What is Delrin made of?

Delrin® is a unique formulation of Polyoxymethylene (POM) developed by DuPont™. This thermoplastic is a high-performance acetal homopolymer resin with numerous desirable physical, mechanical, and chemical properties. It is especially renowned for its durability, stiffness, and dimensional stability.