Many woods have low levels of naturally occurring formaldehyde, which is one reason the credit stresses that no urea-formaldehyde should be added in the binders and glues. Many products are marketed as “urea formaldehyde free,” but you still need to confirm on the MSDS or cut sheet that UF-free binders were used. If the MSDS shows trace amounts of UF, double check with the manufacturer on whether it is UF added to the binder, or is naturally occurring in the wood.