PH (disambiguation)

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pH is a measure of acidity or alkalinity.

PH, ph, pH, and Ph may also refer to:

Sciences[edit]

  • Acidity the numerical value indicating acidity
  • PH (complexity), the union of all complexity classes in the polynomial hierarchy in computational complexity theory
  • Phenyl group, either -Ph or Φ, highly-stable and aromatic hydrocarbon unit found in many organic compounds
  • phot, or ph, a measurement of illuminance (photometry)
  • pico- henry (unit), an SI Unit of electrical inductance
  • Pleckstrin homology domain, a part of many proteins which bind phosphoinositides with high affinity
  • Pulmonary hypertension, a medical condition
  • Soil pH is a measure of soil acidity or soil alkalinity

Aviation[edit]

Other uses[edit]

See also[edit]

  • phi, the Greek letter (φ)