Editing C-4 (explosive) (section)

== Development ==
C-4 is a member of the Composition C family of chemical explosives. Variants have different proportions and plasticisers and include compositions C-2, C-3, and C-4.<ref>{{cite book|author1=Rudolf Meyer|url=http://www.wiley.com/WileyCDA/WileyTitle/productCd-3527316566.html|title=Explosives|author2=Josef Köhler|author3=Axel Homburg|date=September 2007|publisher=Wiley-VCH|isbn=978-3-527-31656-4|page=63}}</ref> The original RDX-based material was developed by the British during [[World War II]] and redeveloped as Composition C when introduced to the U.S. military. It was replaced by Composition C-2 around 1943 and later redeveloped around 1944 as Composition C-3. The toxicity of C-3 was reduced, the concentration of RDX was increased, giving it improved safety during usage and storage. Research on a replacement for C-3 was begun prior to 1950, but the new material, C-4, did not begin pilot production until 1956.<ref name="TM-9-1300-2142">{{Citation |last=Headquarters, U.S. Department of the Army |title=Military Explosives TM 9-1300-214 |date=25 Sep 1990 |url=http://www.lexpev.nl/downloads/tm91300214militaryexplosives.pdf |pages=A-13 (323) |postscript=. |archive-url=https://web.archive.org/web/20220819084946/http://www.lexpev.nl/downloads/tm91300214militaryexplosives.pdf |archive-date=19 August 2022}}</ref>{{rp|125}} C-4 was submitted for patent as "Solid Propellant and a Process for its Preparation" March 31, 1958, by the [[Phillips Petroleum Company]].<ref>{{cite web|author1=D, G.E.|title=US Patent 3,018,203|url=https://patents.google.com/patent/US3018203|access-date=15 July 2014|publisher=Google Patents}}</ref>