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).
Both common and International Union of Pure and Applied Chemistry (IUPAC) names are frequently used for aldehydes and ketones, with common names predominating for the lower homologs. The common names of aldehydes are taken from the names of the acids into which the aldehydes can be converted by oxidation. For an aldehyde, drop the-e from the alkane name and add the ending-al. 2  Methanal is the IUPAC name for formaldehyde, and ethanal is the name for acetaldehyde. 3  For a ketone, drop the-e from the alkane name and add the ending-one.