The red color of the fire retardant is caused by the chemical component iron oxide, commonly known as rust. The retardant is colored with the component so it is easily seen from the air and by ...

The red color of the fire retardant is caused by the chemical component iron oxide, commonly known as rust. The retardant is colored with the component so it is easily seen from the air and by ...

On Thursday evening, Norfolk's Fire-Rescue and Public Work's Stormwater Division notified the Department of Environmental Quality (DEQ) that there was a spill of iron oxide dye used to color mulch.