Editing Composition C (section)

==Properties==
Since 1960 the mixture of [[C-4 (explosive)|C-4]] has contained:
* 90.0–91.0% of cyclonite ([[RDX]] explosives)
* ~2.1% of polyisobutylene (short chain)
* ~1.6% of motor oil
* ~5.3% of di-(2-ethylhexyl)sebacate (dioctyl sebacate), sometimes it was replaced partly by similar compounds such as dioctyl adipate
* less than 0.6% of water
* (small amount of marker or odorising taggant)

It is less volatile than C-3 and has less tendency to harden at low temperature. It has a density 1.48–1.60&nbsp;g/ml, does not become hard even at −55&nbsp;°C (−67&nbsp;°F), and does not exude at +77&nbsp;°C (171&nbsp;°F). C-4 has a detonation velocity of 8092&nbsp;m/s (26550&nbsp;ft/s) at high density and velocity of 7550&nbsp;m/s (24770&nbsp;ft/s) at low density 1.48&nbsp;g/ml. It is so successful that it remains in [[army]] service up to the current time without any significant changes.