Lead dinitroresorcinate

This substance is prepared by the action of a hot solution of lead nitrate on a solution of sodium dinitroresorcinate. The lead salt is precipitated as the solution cools. Lead dinitroresorcinate ignites from a direct flame readily and burns with great velocity. Its initiating action is weaker than that of lead styphnate and it is less sensitive to impact and friction than styphnate. It has therefore recently found application as a component of cap compositions. It is valuable because it is safer to handle than styphnate. The preparation of dinitroresorcinol is discussed in Vol. I, p. 536. 

Ubbelohde et al (Ref) describe a method of detg this period for initiating expls, such as LA (Lead Azide), MF (Mercuric Fulminate), LSt (Lead Styphnate), BaSt (Barium Styphnate) and Basic LDNR (Lead Dinitroresorcinate)... 

The ideal priming composition would consist of a cheap, readily available, relatively safe to handle, simple chemical compound of uniform granulation which when subjected to impact would undergo rapid, highly exothermic decomposition. The only compound to even approach these specifications is lead dinitroresorcinate however, it is far too sensitive. In practice, no single chemical compound meets all the requirements of an ideal primer. 

Lawinit = slurry (Austria) 195 LDNR = lead dinitroresorcinate LE = low explosive propellant (UK) lead acetyl salicylate 164 196 328 lead azide 23 43, 144 196 328 lead block test 197 301 343 lead ethylhexoate 164 200 328 lead nitrate 201 328 lead picrate 201 lead salicylate 164 lead stearate 164 lead styphnate 29 43, 202 328 lead sulfate 164 174 lead trinitroresorcinate = lead styphnate 29 43 202 328 leading lines 203... 

Priming (or Primary) Explosive Compounds or Mixtures (such as Lead Dinitroresorcinate and Lead Styphnate)are sufficiently sensitive to impact or friction to explode (or deflagrate), developing a high temperature and producing... 

Rubenstein, L. Production of normal lead dinitroresorcinate. US Patent 2,493,551, 1950... 

---