TNRS

TNRS (lead trinitroresorcinate) is a fine-crystalline, non-free-flowing substance of dark yellow color; its solubility in water is insignificant. The impact sensitivity of TNRS is lower than that of mercury fulminate and lead azide; in terms of friction sensitivity, it occupies an intermediate position between mercury fulminate and lead azide. TNRS is sufficiently sensitive to thermal effects; under direct sunlight it darkens and decomposes. TNRS does not chemically interact with metals. Due to its low initiating capability, TNRS is not used separately, but is used together with lead azide in some types of detonator caps in order to ensure reliable initiation of lead azide.