Archive for November 2009

Pyrotechnically Relevant Salts of 1-(2-Chloroethyl)-5-nitriminotetrazole – Synthesis and Coloring Properties

Thomas M. Klapötke, Jörg Stierstorfer and Karina R. Tarantika

Abstract:  agents. Salts of strontium are responsible for a red green one and copper salts, only combined with a chlorine donor, are able to yield a blue To investigate the possibility of reducing the amount of metal in pyrotechnic formulations producing colored 1-(2-chloroethyl)-5-nitriminotetrazolato- nitrimino tetrazolate and trans-[diammine-bis{1-(2-chloroethyl)-5-nitrimino tetrazolate- were synthesized and characterized using IR and Raman spectroscopy, elemental analysis, and differential scanning calorimetry (DSC). Their sensitivities towards shock, friction, and electric discharge and the solubility in H calorimetric measurements. Crystal structures of all compounds have been determined by single crystal X-ray diffraction and a detailed description is given. Last but not least, all salts were tested with regard to their color  erformance.

Alkaline and alkaline earth metal salts are widely used in pyrotechnic formulations as colorantfl ame color, barium salts, mostly Ba(NO3)2, for afl ame color.fl ames, the strontium and barium salts of 1-(2-chloroethyl)-5-nitriminotetrazole, trans-[diaquabis{κ2N4,O5} copper(II)] dihydrate, copper(II) 1-(2-chloroethyl)-5-κ2N4,O1}copper(II)2O at ambient temperature were determined. Heats of formation were calculated using bomb

Keywords: pyrotechnics, coloring agent, tetrazoles, perchlorate-free.


Ref: JPyro, Issue 28, 2009, pp61-77
(J28_61)
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Book Review: Initiation of Explosives & Pyrotechnic Materials

By: Jean-Rene Duguet – R&D Manager and Consultant in Pyrotechnics.
Preface by: Dr Attie Goosen
Published by: Cultures et Techniquescultures.techniques@hotmail.fr
ISBN: 978-2-918209-02-7
Price: 50Euros

This small paperback book is packed with information on the chemistry and mechanics of initiation and has extensive chapters on:-

  • General outline
  • Explosives and Production Processes
  • Initaitors and Related Devices
  • Metrology and Safety

There is extensive detail of the physical characteristics of initiating substances, together with formulations and a good section on sensitivity of various initiating explosives.  However the book is somewhat frustrating in so much that the scale and clarity of diagrams and images varies widely, and chemical formulae are inconsistently portrayed.  It is also expensive for a 221page paperback (50 Euros) and I felt that I could have certainly lived with a smaller and more consistent typeface throughout if it left more room for bigger diagrams or had reduced the size and price of the book as a result.

Nevertheless I would recommend this book for the bookshelves of practitioners in almost any area of pyrotechnics and explosives – initiation is often poorly understood, and this book does much to inform the reader in this most important subject.

Reviewed by Dr Tom Smith – Davas Ltd