KOH explained

Koh or KOH may refer to:

Chemistry

Potassium hydroxide, formula "KOH"
KOH test, a procedure in which potassium hydroxide is used to dissolve skin and reveal fungal cells under the microscope

Koh (surname), a surname with various origins, including:
- Xǔ (surname), a Chinese surname sometimes spelled as Koh based on its pronunciation in Southern Min dialects
- Ko (Korean surname), occasionally spelled as Koh

People with the given name Koh include:

Koh Gabriel Kameda (born 1975), German-Japanese concert violinist and violin teacher
Koh Kojima or Kō Kojima (born 1928), Japanese manga artist
Koh Masaki or Kō Masaki (1983–2013), Japanese gay pornographic film actor
Koh Traoré (born 1989), Burkinabé born Ivorian football player
Koh Yasuda (1907–1943), Japanese ophthalmologist, first director of Amami Wakoen Sanatorium, a leprosy sanatorium in Japan

Central Khmer: Koh (Central Khmer: កោះ in Central Khmer pronounced as /kɑh/), a Khmer word meaning 'island', found in names of islands of Cambodia
Thai: Koh (Thai: เกาะ), a Thai loanword from Khmer meaning 'island', found in names of islands of Thailand
Persian: Koh (Persian: کوه), a Dari word meaning 'mountain', found in names of mountains of Afghanistan
Urdu: Koh (Urdu: کوه), an Urdu loanword from Persian meaning 'mountain', found in names of mountains of Pakistan

Koh the Face Stealer, a character in Avatar: The Last Airbender
King of the Hammers, an off-road race in Johnson Valley, California, United States