Phos-Check is a brand of long-term fire retardant that has been used to fight fires since the 1960s. It is said to contain roughly 85% water, 10% fertiliser and 5% minor ingredients.

Chek, a hot-pink aerial fire suppressant, plays a crucial role in protecting communities. But what is it made of, and is it safe for the environment? Explore the benefits and concerns surrounding this essential firefighting tool.

The powdered substance sprayed over the California wildfires is called Phos-Chek. It contains ammonium phosphate — an ingredient commonly found in fertilizer.

The bright substance blanketing areas of Los Angeles County has long been used to stop wildfires from spreading.

Bright pink powder blanketing Los Angeles has caught the attention of many as fire retardant Phos-Chek is dropped by air tankers to control wildfires. This chemical barrier prevents flames from spreading by coating vegetation and flammable surfaces,