Workers often inhale lead, cadmium, dioxins, furans, phthalates and brominated flame retardants. The list includes halogenated flame retardants and phthalates. Firemaster 550 is one of Chemtura's brominated flame retardants. Such additives can replace halogenated flame retardants, which face environmental restrictions. Many products containing halogenated flame retardants are sent to landfills. Some occupations expose workers to higher levels of halogenated flame retardants and their degradation products. PBB and PBDE are flame retardants used in several plastics. Typical fire retardants contain the same agents as fertilizers. Phosphorus-based and halogen-based flame retardants decrease production of smoke. Latex and acrylic emulsions require the use of drying retardants suitable for water-based coatings. PBDEs have been largely phased out and replaced with alternative phosphate flame retardants. This labelling requirement has triggered demand for furniture free of flame retardants. The environmental behaviour of flame retardants has been studied since the 1990s. The modified regulation does not mandate a reduction in flame retardants. Compounding with APP-based flame retardants in polypropylene is described in.