Fire Retardant in Paint
Sally Choi
Sir Winston Churchill
Floor Location : M 214 P

Which dry chemical found in fire extinguishers will function as the most effective fire retardant in paint? Each of the three chemicals, sodium bicarbonate NaHCO3, ammonium phosphate NH4H3PO4, and potassium chloride KCl, was mixed with paint and was used to coat several skewers. In four trials, these skewers were directly exposed to open flames for two minutes and the length of the skewer remaining not charred was measured. The prediction that sodium bicarbonate would be the most effective because of its low decomposition point and its ability to produce both water vapour and carbon dioxide upon decomposition was correct.