View source for Smokeless powder

[[File:Smokeless powder from WWII cartridge.jpg|thumb|300px|WW2 smokeless powder (appears more grey in person)]]
'''Smokeless powder''' is the name given to a number of propellant materials, widely used in firearms and artillery, which replaced [[black powder]]. As its name suggests, it produces very little smoke when fired/ignited.

However, despite it's name, smokeless powder is rarely a powder, but rather it appears as pellets or extruded granules.

==Types==
There are lots of categories or smokeless powders, which depend on their properties, such as composition, speed of combustion, etc.

Most if not all smokeless powders contain [[nitrocellulose]], and they are split into three main groups:
*''Single-base powder'': Use only nitrocellulose or a colloid or NC with alcohol or ether as a propellent, additives and stabilizers (diphenylamine e.g.)
*''Double-base powder'': Nitrocellulose with [[nitroglycerin]].
*''Triple-base propellant'': Nitrocellulose, nitroglycerin and [[nitroguanidine]]

==Properties==
Smokeless powder is a silvery-gray or dull gray solid, insoluble in all solvents (though nitroglycerin and nitroguanidine will dissolve in organic solvents). It is typically odorless, with a density between 0.9-1.0 g/cm<sup>3</sup>.

==Availability==
Smokeless powder is sold in many countries as gun powder, and is available in most gun stores.

In Europe, occasionally one might accidentally dug up WWII ammo, which, if intact, still has usable smokeless powder, though of a lower quality than modern powders. However, due to legal issues surrounding UXOs and common sense, it's best to avoid making a habit out of this practice.

==Preparation==

==Projects==
*Firearm ammunition
*Historic firearm models (handcannon, arquebus, matchlock, etc.)
*Fuses
*Rockets

==Handling==
===Safety===
As with any nitroester, it's best to avoid exposure, as being a strong vasodilator, will induce severe headaches and chest pain.

===Storage===
Smokeless powder is best stored in spark-free containers, away from any ignition source or strong base. Diphenylamine can be added as a stabilizer.

===Disposal===
Smokeless powder can be safely burned outside. It can be dumped in ground, in small quantities.

==References==
<references/>
===Relevant Sciencemadness threads===
*[http://www.sciencemadness.org/talk/viewthread.php?tid=13080 Smokeless powder manufacture]
*[http://www.sciencemadness.org/talk/viewthread.php?tid=31153 looking for smokeless flash powder recipe]
*[http://www.sciencemadness.org/talk/viewthread.php?tid=19176 Home produced smokeless propellants]
*[http://www.sciencemadness.org/talk/viewthread.php?tid=2432 Dissolving smokeless powder?]

[[Category:Materials with no specific chemical formula]]
[[Category:Pyrotechnics]]
[[Category:Energetic materials]]
[[Category:Energetic mixtures]]
[[Category:Low explosives]]
[[Category:Things that can kill you very quickly]]