Tetrazene explosive
- 5 - (4 -amidino -1 - tetrazeno ) - 5H -tetrazol- hydrate
- (5- tetrazolyl )-4- guanyltetrazen hydrate
- Tetrazolyl guanyl tetrazene hydrate
- 4 - (1H- tetrazol-5- yl )-3- tetrazene -2- carboximidamide
- 1 - (5 -tetrazolyl )-4- guanyltetrazen
- 1-amino- 1-( 1H-tetrazol- 5-yl) - azoguanidin
Pale yellow flaky crystals
Fixed
1.7 g · cm -3
137-139 ° C ( decomposition above 110 ° C)
Insoluble in water, ethanol, diethyl ether, benzene and carbon tetrachloride
Template: Infobox chemical / molecular formula search available
Tetracene is an energetic, solid nitrogen compound which evaporates on ignition under development of black smoke. Tetracene is an important component of random -, impact - and heat-sensitive Zündsätzen that are used among other things in percussion caps and electric detonators bridge for airbags.
Properties
Tetracene forms colorless to pale yellow, flaky crystals and can occur in different polymorphic forms. It exists in the crystalline state as a hydrated zwitterion. The compound explosive, and the group of primary explosives is associated. Tetrazene long-term stability to about 75 ° C and evaporates at 140 ° C after a few seconds. Dry tetracene is very flammable and has a high energy explosion. The lead block expansion is 155 ml/10 g The compound is friction sensitive with 0.1 kgf · m = 1.0 Nm sensitive to impact or with 8N. Tetrazene is practically insoluble in water, alcohol, ether, benzene and carbon tetrachloride. It is decomposed by boiling water or aqueous alkalis. The solubility is good in formic acid / acetic acid / acetic anhydride. Tetrazene dissolves in concentrated hydrochloric acid and concentrated nitric acid in cold (0-5 ° C) without degradation and is excreted by dilution with water. Despite the low thermal stability show eight years under normal conditions stored tetrazene samples still have a purity of 99.9 %.
Tetracene is extremely sensitive to electrostatic discharge and comparable in terms of mechanical sensitivity with mercury (II ) fulminate.
Representation
Tetracene can be prepared by reaction of sodium nitrite with a soluble salt of aminoguanidine in acetic acid represent ( synthesize).
Use
Tetrazene is used as high-energy sensitizer Zündsätzen based on lead styphnate; the addition of tetracene increases the responsiveness and reliability. Lead azide is very sensitive by mixing 5% tetrazene against puncture and impact. Tetrazene alone is a poor initiating explosive, which loses its sensitivity due to excessive compression, that is, tetracene can be easily totgepresst.
History
Tetracene was first produced in 1910 by Hoffmann and Roth.
Right
The production and processing of tetracene is prohibited without a license under the Explosives Act.
Substance Group
Tetrazene should not be confused with the substance group of related tetrazenes, especially not with 1- tetracene, as its derivative, it can be understood.
Likelihood of confusion
Tetracene can be easily confused with Tetrazenen, tetrazines, tetrazole and tetracene.