Laboratoire Central des Poudres

Analyses of unknown samples of explosives used in primers and detonators before WWII in the Laboratoire Centrale de Poudres, Paris, are described in Vol 1 of Encycl, p A580-R (Ref 18)... 

We are not including here analytical procedures for the above compositions This Section 8 was reviewed by Mr Nathan Liszt of PicArsn Refs 1) M. Marqueyrol P. Loriette, MP 18, 93-5(1921) (Analysis of an unknown sample of an initiating mixture by the method used in the Laboratoire Centrale des Poudres, Paris, France) (Abstracted in Vol 1 of Encycl, p A580-R)... 

TNPEN was first prepd by Lewis (Ref 2), and subsequently by several other investigators (see Refs 3,4, 5 7). Ficheroulle (Ref 7) prepd it in 1937 at the Laboratoire Central des Poudres, by the nitration of /3-(2,4-Dinitrophenoxy) ethanol, but the results were not published until 1948 (Ref 3). The substance was purified by pptn of the nitrated mixt with w, and crystn from acet... 

I) Analysis of on Unknown Sample by the Method Used in the Laboratoire Centrale des Poudres as described by M. Marqueyrol P.Lotiette in MP 18, 93-5(1921) ... 

Munich,[B] and applied to the analysis of nitro- explosives by M. Chenel, of the Laboratoire Centrale des Poudres, whose method of proeedure is as follows —0.5 gmi. of the finely powdered substance is digested in the cold with a solution of 1.2 gim. of phenol and 0.4 grm. phosphoric anhydride in 30 c.c. of sulphuric acid. The mixture is kept well shaken until the solution is complete. From 3 to 4 grms. of zinc-dust is then cautiously and gradually added, the temperature of the mass being kept down until complete reduction has been effected. Finally, 0.7 grm. of mercury is added, and the process continued in the usual way, according to Kjeldahl that is, the hquid is distilled until all the ammonia has passed over, and is absorbed in the standard acid. The distillate is then titrated with standard ammonia. 

Paul Vieille s departure from the regular Laboratoire Central des Poudres (LCP) facilitated a reconciliation between the rival parties, and a recognition of the LCP... 

B) P. Aubertein, MP 30, 7-42(1948) CA 45, 353(1951) (The following nitrated glycols were prepd after WWII at the Laboratoire Central e des Poudres, Paris Ethyleneglycol-dinitrate Diethyleneglycoldinitrate Triethyl-eneglycoldinitrate 1,3-Butanedioldinatrate 1,4-Butanedidldinitrate and 2,3-Butanediol-... 

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