Used thermacare the first time and heard an alarm sound in my home, wondering if it emits any carbonmonoxide?

Question

I used thermacare for my back pain. The instructions say to just open it and it will heat up in 30 min. For me it took longer, after about an hour I wore the thermacare wrap around my back. In 1 hours time I heard an alarm twice, may have been my smoke/CO alarm, but it stopped.
I checked their site and found that the wrap has charcoal, salt and some other natural items that slowly burn when exposed to oxygen.

Wondering if anyone knows if its possible to produce any carbon monoxide as part of its combustion?

Answer 1

It doesn't combust, it oxidizes. If you imagine rust forming on a piece of iron, well, that's what happens in the Thermacare packet. Oxidation is a chemical reaction between oxygen and onother compound that creates heat. It will not create carbon monoxide gas. I suggest you have your heater, water heater, or boiler serviced to make sure you don't have an exhaust leak in your home.