METAL PICRAMATES

A plot of logio Ed against 1/1) is almost rectilinear. Therefore, Ea may be determined by equating (EJ4.57) with the slope of the straight line. Equation 3.3 holds good for a number of explosives such as lead azide, cuprous azide, mercury fulminate, lead styphnate, barium styphnate and metal picrates and metal picramates etc. [25-30]. Thus, it appears that the determination of Ea gives a more complete picture concerning the heat sensitivity of explosives than ED or ET. 

Metal cyanides(and cyano complexes), 216 Metal derivatives of organofluorine compounds, 217 IV-Metal derivatives, 218 Metal dusts, 220 Metal fires, 222 Metal fulminates, 222 Metal halides, 222 Metal—halocarbon incidents, 225 Metal halogenates, 226 Metal hydrazides, 226 Metal hydrides, 226 Metal hypochlorites, 228 Metallurgical sample preparation, 228 Metal nitrates, 229 Metal nitrites, 231 Metal nitrophenoxides, 232 Metal non-metallides, 232 Metal oxalates, 233 Metal oxides, 234 Metal oxohalogenates, 236 Metal oxometallates, 236 Metal oxonon-metallates, 237 Metal perchlorates, 238 Metal peroxides, 239 Metal peroxomolybdates, 240 Metal phosphinates, 240 Metal phosphorus trisulfides, 240 Metal picramates, 241 Metal pnictides, 241 Metal polyhalohalogenates, 241 Metal pyruvate nitrophenylhydrazones, 241 Metals, 242 Metal salicylates, 243 Metal salts, 243 Metal sulfates, 244 Metal sulfides, 244 Metal thiocyanates, 246 Metathesis reactions, 246 Microwave oven heating, 246 Mild steel, 247 Milk powder, 248... 

Agrawal, J.P. (1970) Ph.D. Thesis entitled, Explosive Nature of Metal Picrates and Picramates, Gorakhpur University. 

This substance was the first diazo compound to be discovered. It was prepared by Griess [11] by diazotizing picramic acid. Its explosive properties attracted the attention of Lenze [12] who found it to be as valuable as mercury fulminate in spite of its higher sensitiveness to impact. This compound is also of interest as being the first initiator containing no heavy metals. It has now been utilized in the United States of America and Japan as a component of initiating charges in detonators and caps. 

N 9.13% small, carmine red plates with a metallic luster mp 159° (decompn). Moderately sol in acet, ethanol and pyridine, si sol in chlf, eth and toluene insol in carbon tetrachloride and It petr. Prepn is by reacting an aq soln of Tl diethyl hydroxide with picramic acid, and then evapg the soln to dryness. The product is crystd from ethanol. The phenoxide explds violently when moistened with fuming nitric acid... 

Note Salts of picramic acid are made by neutralizing picramic acid with metal hydroxides or carbonates. Most salts of picramic acid are primary explosives. 

Thalliumdiethyl Picramate(called by Goddard Thalliumdiethy 1-4,6-dinitro 2-aminophenoxide ), (C,H,),Tl-C.H N,0,mw 432.57, N9.71%. Small carmine red plates with metallic lustre, mp 159 with decomp(darkening ca 140°) expl violently... 

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