That's formaldehyde. I do recall something written years back about losses of snakes kept in melamine cages which were exposed to high heat levels. The high heat caused the material to outgas formaldehyde and adversely affected the reptiles.
There was a movement to use only formaldehyde-free melamine in reptile cages. If you look around, you can find it.
If the particle board you purchased contains formaldehyde (something you should be able to find out by contacting the place of sale), then you may either want to think twice, or try sealing it extremely well and avoid exposing it to high heat levels. If you're using it in a rack, rather than directly as a cage, this may be easier to do.