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Semtex is a general-purpose plastic explosive containing RDX and PETN. [1] It is used in commercial blasting, demolition , and in certain military applications. Semtex was developed and manufactured in Czechoslovakia , originally under the name B 1 and then under the "Semtex" designation since 1964, [ note 1 ] labeled as SEMTEX 1A , since 1967 ...
A C-4 charge packed onto a marine anchor chain. Plastic explosives are especially suited for explosive demolition of obstacles and fortifications by combat engineers as they can be easily formed into ideal shapes for cutting structural members and have a high enough velocity of detonation and density for metal cutting work.
PETN is practically insoluble in water (0.01 g/100 mL at 50 °C), weakly soluble in common nonpolar solvents such as aliphatic hydrocarbons (like gasoline) or tetrachloromethane, but soluble in some other organic solvents, particularly in acetone (about 15 g/100 g of the solution at 20 °C, 55 g/100 g at 60 °C) and dimethylformamide (40 g/100 ...
The final material is a solid with a dirty white to light brown color, a putty-like texture similar to modeling clay, and a distinct smell of motor oil. [ 7 ] [ 8 ] [ 9 ] Depending on its intended usage and on the manufacturer, there are differences in the composition of C-4.
RDX is often used in mixtures with other explosives and plasticizers or phlegmatizers (desensitizers); it is the explosive agent in C-4 plastic explosive and a key ingredient in Semtex. It is stable in storage and is considered one of the most energetic and brisant of the military high explosives, [2] with a relative effectiveness factor of 1.60.
Mercaptan is a harmless chemical that smells like sulfur or rotten eggs that utility companies add to natural gas to make it easier to detect leaks, according to Healthline, a medical information ...
An example is with Semtex, which now is made with DMDNB added as a detection taggant. [16] DMDNB is a common taggant as dogs are sensitive to it. In the UK, the relevant legislation is the Marking of Plastic Explosives for Detection Regulations 1996. [17]
Others liken it to "sweet smelling welding fumes," "seared steak," or other odd combos such as this description on twitter from ESA astronaut, Alexander Gerst: "To me, space smells like a mixture ...