NO RV MANUFACTURE USES FORMALDEHIDE...
If there is any... It's in the carpeting, plywood, etc.
There are pthlates in plastics... they are the plasticisors... they make it platic products flexable and off-gas the new car smell.
It usually goes away in about a year... but the plastics are getting more brittle.
Are they harmful... I think so.
If you are buying a used camper that is more than a year old you shouldn't smell anything.
If you do smell something it is probably the cleaners they used to prep the camper for sale... or even worse... perfumes to cover the smells from mold where the camper may be leaking.
Good luck
sleepy
