### explosive gas | propane:

Liquid propane
* freezing agent much like dry ice.
* is highly flammable and dangerous if it escapes
  - liquid fuel
  - liquids
  - used to heat hot air balloons

Chemical explosive
* account for virtually all explosive applications in engineering.
* are just things that burn, but burn very fast
  - of two general kinds

### explosive | explosive charge:

Rocket propellant
* are the fuels and the oxidizers carried by the rocket for propulsion.
* is explosive charge
  - highly dangerous and explosive

Gunpowder
* contains nitrates and sulfur compounds.
* is an explosive

### explosive:

High explosive
* are applicable where truth and logic fail
  - explosives
  - unstable chemical compounds that are sensitive to shock
* detonate with a shock wave that travels faster than the speed of sound
  - violent chemical reaction
* give off toxic gas and vaporize thin metal casings.
* produce more pressure than low explosives but low explosives are more safe to use.
+ Explosive material: Chemistry
  * This classification depends on their rate of explosion. A low explosive is a material, which burns very fast, but does not explode generally. For exploding them, people mix them with high explosives. Sometimes, even a low explosive may detonate. A high explosive bursts and explodes very fast. High explosives produce more pressure than low explosives but low explosives are more safe to use. Military weapons use high explosives.

Hydrazoic acid
- extremely toxic , even more toxic than sodium azide
  - hydride
  - very explosive
+ Hydrazoic acid, Properties: Acids :: Nitrogen compounds
  * Hydrazoic acid is very explosive. It is a powerful reducing agent. It is used to make other azides. It has an unpleasant smell
  - Safety
  * Hydrazoic acid is extremely toxic, even more toxic than sodium azide. It can make very bad headaches. It has a bad odor. It does not accumulate in the body

### explosive | low explosive:

Pyrotechnic
* are hazardous due to the nature of their explosive, flammable, or toxic tiller
  - making
  - most applicable in rural settings
* is indoor fireworks that make a dance quite a celebration
  - the area of special effects devoted to explosions
* produce irritating and obscuring smoke.

### explosive:

Primary explosive
* are very unstable and rapidly react to shock , friction , and heat.
* detonate by ignition i.e. a flame, spark, impact, or other means of heat.
+ Explosive material: Chemistry
  * Primary explosives are very unstable and rapidly react to shock, friction, and heat. Any shock, friction, or heat makes primary explosives to burn or blast fast. Secondary explosives are much more safe to use and do not react very fast to shock, friction, and heat. Any shock, friction, or heat may burn such explosives, but not make them to burst and blast. Some people call secondary explosives as base explosives. Some people also tell about another group of explosives.

Smokeless powder
* can either be single based or double based.
* is an explosive
  - extremely flammable solid and can be dangerous if improperly handled
  - used in muzzleloading firearms

Warhead
* are explosives
  - mechanical devices
* come in a wide variety of designs, some only useful for special purposes.
* consist of nuclear materials, conventional high explosives, and related firing mechanisms.