UN 219: Trinitroresorcinol (styphnic acid), wetted

DOT Classification and Shipping

UN 219 is assigned the proper shipping name Trinitroresorcinol (styphnic acid), wetted in the U.S. DOT Hazardous Materials Table (49 CFR 172.101). It is classified as a Class 1.1A Explosive material. Required label(s): 1.1.

Packing group indicates the degree of danger within a hazard class: PG I is high danger, PG II medium, PG III low. The proper shipping name, hazard class, UN number, and packing group together form the basic shipping description that must appear on shipping papers and, where required, on the package and placard.

Emergency Response (ERG Guide 112)

Hazards: May explode or be projected if heated. Fragments may travel great distances. Fire may produce irritating or toxic gases.

Fire: DO NOT fight fire when it reaches cargo. Evacuate area and let burn. Fight fire from maximum distance.

Spill: Do not touch or walk through spilled material. Isolate spill area immediately.

Chemical and Physical Properties

Trinitroresorcinol appears as a yellowish, crystalline solid. Used as a priming agent. Very sensitive to heat. Primary hazard is blast of an instantaneous explosion, not flying projectiles or fragments. Under prolonged exposure to fire or heat the containers may explode violently.

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Reference data compiled from the DOT Hazardous Materials Table (49 CFR 172.101), the 2024 Emergency Response Guidebook, and public chemical databases (PubChem, NIOSH, EPA). Always verify the correct shipping description against the current regulation and the manufacturer's SDS Section 14 before shipping.