CH5

The abbreviations CH5, Ch5, and variations thereof may mean:


 * , the chemical formula of methanium, an organic ion
 * CH5 Deeside, part of the CH postcode area, Great Britain
 * Bacteriocin CH5, an antibacterial produced by Lactobacillus acidophilus
 * Chile Route 5, a highway in Chile
 * CH5, a type of cirrus cloud
 * Channel 5 (disambiguation), a common name of television networks, channels and stations around the world
 * 22291 Heitifer (1989 CH5), a main-belt asteroid