neum on itis , ▁or ▁pul mon ary ▁ed ema . ▁ ▁Like ▁other ▁metal ▁car b ony ls , ▁Fe ( CO ) 5 ▁is ▁fl amm able . ▁It ▁is , ▁however , ▁consider ably ▁less ▁to xic ▁than ▁nick el ▁t et rac ar b ony l . ▁ ▁In ▁regards ▁to ▁occup ational ▁expos ures ▁to ▁iron ▁pent ac ar b ony l , ▁the ▁National ▁Institute ▁for ▁Occ up ational ▁Saf ety ▁and ▁Health ▁has ▁set ▁a ▁recommended ▁expos ure ▁limit ▁at ▁ 0 . 1   pp m ▁( 0 . 2 3   m g / m 3 ) ▁over ▁an ▁eight - hour ▁time - weight ed ▁average , ▁and ▁a ▁short - term ▁expos ure ▁limit ▁at ▁ 0 . 2   pp m ▁( 0 . 4 5   m g / m 3 ). ▁ ▁References ▁ ▁Category : Car b ony l ▁complex es ▁Category : I ron ▁comp ounds ▁Category : Ant ik no ck ▁agents <0x0A> </s> ▁P uff ▁the ▁Magic ▁Dragon ▁is ▁a ▁ 3 0 - min ute ▁animated ▁television ▁special ▁based ▁on ▁the ▁song ▁of ▁the ▁same ▁name ▁by ▁Peter , ▁Paul ▁and ▁Mary . ▁This ▁film ▁is ▁produced ▁by ▁Fred ▁Wolf ▁Films . ▁The ▁title ▁character ▁was ▁vo iced ▁by ▁Burg ess ▁Mer ed ith . ▁The ▁do ctors ▁were ▁vo iced ▁by ▁Frank ▁Nelson , ▁Reg is ▁Cord ic , ▁and ▁Charles ▁W ool f . ▁The ▁special ▁first ▁a ired ▁October ▁ 3