C-4 (explosive) C-4 or Composition C-4 is a common variety of the plastic explosive family known as Composition C. The British version of the explosive is known as PE-4 (Plastic Explosive). C-4 is composed of explosives, plastic binder, plasticizer to make it malleable, and usually a marker or odorizing taggant chemical. C-4 has a texture similar to modeling clay and can be molded into any desired shape. C-4 is stable and an explosion can only be initiated by the combination of extreme heat and shock wave from a detonator.
An aldehyde /ËaeldÉ¨haÉªd/ ËÃ¦ldÉ¨haÉªd or alkanal is an organic compound containing a formyl. Group the formyl group is a functional, group with the Structure-R, cho consisting of a carbonyl (center a carbon double bonded to) oxygen bonded to hydrogen and An r, group which is any generic alkyl or side. chainecause of resonance stabilization of the conjugate base, an Î±-hydrogen in an aldehyde (not shown in the picture above) is far more acidic, with a pKa near 17, than a C-H bond in a typical alkane (pKa about 50).
The double bond between carbon and oxygen is characteristic of all aldehydes and is known as the carbonyl group. Many aldehydes have pleasant odours, and in principle, they are derived from alcohols by dehydrogenation (removal of hydrogen), from which process came the name aldehyde. Aldehydes undergo a wide variety of chemical reactions, including polymerization.