Production

Melamine formaldehyde (also called melamine or MF) is a hard, very durable, and versatile thermosetting, it is made from melamine and formaldehyde by condensation of the two monomers (1).

Properties and uses

 Melamine has a good fire-retardant properties, its salts are used as fire-retardant additives in paints, plastics, and paper. It is used for the manufacture of many products, including kitchenware, laminates, overlay materials, particleboards, and floor tiles (2). 

Toxicity

Consuming high levels of melamine may cause issues such as kidney stones or outright kidney failure (1). If it contain residual formaldehyde, they may cause irritation and allergic reactions. Trace amounts of free formaldehyde may cause allergic reactions in people who are already sensitized to it (3).

1) https://capitalresin.com/how-melamine-resin-is-used-and-why-its-safe/
2) https://polymerdatabase.com/polymer%20classes/MelamineFormaldehyde%20type.html/
3) https://www.nontoxichub.com/plasticssafetyoverview/