Lead Salts of 4,6-Dinitroresorcinol

4-Dmitroresorcinol (2,4-DNR) forms a variety of lead salts (2,4-LDNRs) including acid, normal, and a large number of basic ones. The most commonly used and best characterized is the normal 2,4-LDNR. 

Normal 2,4-LDNR exists in two forms yellow and orange described in one source [8] or orange and red described in another source [15]. The crystal density is 

2 g cm [8, 15]. These forms have differing physical but similar explosive properties. Lead 2,4-dinitroresorcinol is insoluble in water, acetone, benzene, and other common organic solvents [8]. 

Normal 2,4-LDNR is a less powerful explosive with even lower initiation efficiency than lead styphnate. According to Payne, 0.4 g is not sufficient for initiation of tetryl [8, 14]. 2,4-LDNR is less sensitive to impact and friction than lead styphnate. Sensitivity and brisance of practically useful lead salts of polynitroresorcines generally decrease both with increasing amotmt of lead and decreasing amount of nitrogen (Table 5.1) [8]. The main reason for the practical application of normal 

4- LDNR, despite its poorer explosive properties compared to LS, is increased handling safety (particularly less susceptible to static electricity) [8, 9, 16]. 

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Both 2,4-dinitrosoresorcinol (23) and 2,4-dinitroresorcinol (24) are important in the explosives industry. The lead salt of 2,4-dinitrosoresorcinol has a low ignition temperature and finds use in priming compositions and in electrical igniters. The lead salt of 2,4-dinitroresorcinol is a weak initiator but is found to exhibit high sensitivity to friction and stab action without being highly sensitive to impact, and as such, this compound has found use in primers. 

LDNR Lead salt of 2,4-dinitroresorcinol lead salt of 2,4-dinitrobenzene-... 

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