Why did my dog lose it when he smelled the soap from a brillo pad?

Was cleaning dirty buckets out on the back porch, removed a new Brillo pad out of the box to clean them out. My male dog went crazy. Acted as if we were intruders trying to get into the house. His hair stood up and he barked and growled as if we were trying to harm him. Would not come back onto the porch. This dog has never shown this type of behavior before. would not come to us when called, avoided the porch like the plague. My other 2 dogs both females were unphased by the smell. i have never heard of a dog becoming agitated by a smell. It was as if he was scared by the smell of the soap. Anyone have an idea?