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Phenylboronic acid
Phenylboronic acid, also known as benzeneboronic acid, is a white crystalline arylboronic acid with formula C6H7BO2, used mainly as a reagent in Suzuki–Miyaura cross-coupling and as a sugar receptor.
Phenylhydrazine
Phenylhydrazine (C₆H₈N₂) is the simplest aryl hydrazine, a toxic compound Emil Fischer discovered in 1875 and used to work out the structures of the sugars.
Phenylisobutylamine
Phenylisobutylamine, also known as α-ethylphenethylamine or AEPEA, is a synthetic phenethylamine stimulant and structural isomer of amphetamine that has appeared as an undeclared ingredient in dietary supplements.
Phenylpropanolamine
Phenylpropanolamine, also known as norephedrine, is a sympathomimetic amine formerly used as a nasal decongestant and appetite suppressant, withdrawn from US drugs in 2000 after a study linked it to hemorrhagic stroke.
Phenylsilane
Phenylsilane is an organosilicon compound, a colorless volatile liquid with three silicon–hydrogen bonds, used in organic synthesis as a mild reducing agent, hydride donor, and precursor to polysilanes.
Phenylthiohydantoin
Phenylthiohydantoin, or PTH, is a thiohydantoin bearing a phenyl group whose amino acid derivatives are the end products of Edman degradation, identified by HPLC to sequence peptides.
Phenylurea
Phenylurea, also known as N-phenylurea or phenylcarbamide, is the simplest N-substituted urea, a white crystalline solid also giving its name to a family of herbicides including diuron.
Pher G. Andersson
Pher G. Andersson is a Swedish organic chemist, professor of organic chemistry at Stockholm University since 2013, known for iridium-catalyzed asymmetric hydrogenation and a Fulbright stay with K. Barry Sharpless at Scripps.
PhET Interactive Simulations
PhET Interactive Simulations, originally short for Physics Education Technology, is a University of Colorado Boulder project, founded in 2002 by Carl Wieman, offering free interactive science and math simulations.
Phi Andromedae
Phi Andromedae, officially named Junnanmen (军南门) by the IAU in 2025, is a Be star of type B7Ve in Andromeda, about 717 light-years away and visible to the naked eye.
Phi coefficient
The phi coefficient is a measure of the association between two binary variables, computed from a 2 × 2 table and ranging from −1 to +1.
Phi meson
The phi meson, written φ(1020), is a neutral vector meson of a strange quark and antiquark, discovered at Brookhaven in 1962 and decaying mostly to kaon pairs.
Phi Persei
Phi Persei, named Dajiangjunbei in 2025, is a binary star in Perseus where a rapidly spinning Be star orbits a hot stripped subdwarf every 126.7 days.
Phi-2 Orionis
Phi-2 Orionis, also cataloged as 40 Orionis, is a naked-eye orange giant star in Orion about 116 light years away, visible at magnitude 4.09 and receding at about 99 km/s.
Phil Mason
Phil Mason, known online as Thunderf00t, is a British chemist at the Czech Academy of Sciences in Prague whose YouTube channel debunks creationism and pseudoscience.
Phil Muntz
Phil Muntz, born Eric Phillip Muntz, was a Canadian-born aerophysicist at the University of Southern California known for electron beam fluorescence diagnostics and the Knudsen compressor.
Phil Plait
Phil Plait, also known as the Bad Astronomer, is an American astronomer and science writer who debunks astronomy misconceptions online and wrote Bad Astronomy (2002).
Phil S. Baran
Phil S. Baran, born 1977 in Denville, New Jersey, is an American organic chemist at Scripps Research known for ideal synthesis, named reagents, and a 2013 MacArthur Fellowship.
Philip A. Ekstrom
Philip A. Ekstrom is a physicist and former student of Hans Dehmelt who co-authored the 1973 isolation of a single electron at the University of Washington, Seattle.
Philip A. Gale
Philip A. Gale is a British supramolecular chemist known for work on anion recognition and transport, and Professor of Supramolecular Chemistry at the University of Groningen since 2026.
Philip Abelson
Philip Abelson (1913–2004) was an American nuclear physicist who co-discovered the element neptunium in 1940, directed Carnegie's Geophysical Laboratory, and edited Science from 1962 to 1984.
Philip Anderson Shaffer
Philip Anderson Shaffer (1881–1960) was an American biological chemist who established that insulin is a protein and headed the Department of Biological Chemistry at Washington University School of Medicine from 1910 to 1946.
Philip B. Allen
Philip B. Allen is an American theoretical physicist who spent 1971 to 2016 as a professor at Stony Brook University, known for his 1975 reanalysis of superconductor transition temperatures.
Philip Burke King
Philip Burke King (1903–1987) was an American geologist with the U.S. Geological Survey who compiled the standard tectonic maps of the United States and North America.
Philip Burton Moon
Philip Burton Moon (1907–1994) was a British experimental physicist who proved neutrons reach thermal energies, worked on the MAUD Committee and at Los Alamos, and held Birmingham's Poynting Chair.
Philip E. LaMoreaux Sr.
Philip E. LaMoreaux Sr. (Philip Elmer LaMoreaux, 1920–2008) was an American hydrogeologist, Alabama state geologist from 1961 to 1976, and a leading expert on karst.
Philip Elmer LaMoreaux
Philip Elmer LaMoreaux (1920–2008) was an American hydrogeologist known for his work on karst, who served as Alabama state geologist from 1961 to 1976 and was elected to the National Academy of Engineering in 1989.
Philip England
Philip England, born 1951, is a geophysicist at the University of Oxford known for showing continents deform as viscous fluids and for work on Tibet.
Philip F. Hopkins
Philip F. Hopkins is an American theoretical astrophysicist, the Ira S. Bowen Professor at Caltech, known for galaxy formation research and for leading the FIRE simulations and developing the GIZMO code.
Philip F. Low
Philip F. Low (1921–1997) was a Canadian-born soil physical chemist at Purdue University who pioneered the thermodynamics of clay–water systems and was elected to the National Academy of Sciences in 1992.