als , ▁studies ▁have ▁linked ▁prolong ed ▁in hal ation ▁of ▁formal de hy de ▁g ases ▁to ▁cancer . ▁Engine ered ▁wood ▁compos ites ▁have ▁been ▁found ▁to ▁emit ▁potentially ▁harm ful ▁amounts ▁of ▁formal de hy de ▁gas ▁in ▁two ▁ways : ▁un react ed ▁free ▁formal de hy de ▁and ▁chemical ▁decomposition ▁of ▁res in ▁ad hes ives . ▁When ▁ex or bit ant ▁amounts ▁of ▁formal de hy de ▁are ▁added ▁to ▁a ▁process , ▁the ▁excess ▁will ▁not ▁have ▁any ▁add itive ▁to ▁bond ▁with ▁and ▁may ▁se ep ▁from ▁the ▁wood ▁product ▁over ▁time . ▁Che ap ▁u rea - form al de hy de ▁( U F ) ▁ad hes ives ▁are ▁largely ▁responsible ▁for ▁de grad ed ▁res in ▁em issions . ▁ ▁Mo ist ure ▁de gr ades ▁the ▁weak ▁U F ▁mole cules , ▁resulting ▁in ▁potentially ▁harm ful ▁formal de hy de ▁em issions . ▁Mc L ube ▁offers ▁release ▁agents ▁and ▁pl aten ▁se al ers ▁designed ▁for ▁those ▁manufact ur ers ▁who ▁use ▁reduced - form al de hy de ▁U F ▁and ▁mel am ine - form al de hy de ▁ad hes ives . ▁Many ▁orient ed ▁str and ▁board ▁( SB ) ▁and ▁p lywood ▁manufact ur ers ▁use ▁phen ol - form al de hy de ▁( PF ) ▁because ▁phen ol ▁is ▁a ▁much ▁more ▁effective ▁add itive . ▁Ph en ol ▁forms ▁a ▁water - res istant ▁bond ▁with ▁formal de hy de ▁that