PH (disambiguation)

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pH is a measure of acidity or alkalinity.

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

Arts and media[edit]


Companies and organizations[edit]

  • Pakatan Harapan (also known as "Alliance of Hope"), a political coalition in Malaysia


Science and technology[edit]


  • Phenyl group, either -Ph or Φ, highly-stable and aromatic hydrocarbon unit found in many organic compounds
  • Pleckstrin homology domain, a part of many proteins which bind phosphoinositides with high affinity


  • .ph, the Philippines' Internet country code top-level domain
  • Ph protocol, an early web database search for CCSO Nameserver described by RFC 2378
  • PH (complexity), the union of all complexity classes in the polynomial hierarchy in computational complexity theory


  • Phot, or ph, a measurement of illuminance, in photometry
  • Picohenry, an SI Unit of electrical inductance

Other sciences[edit]

Other uses[edit]

See also[edit]

  • Phi (φ), a letter of the Greek alphabet