All articles starting with P

Potamogetonaceae

Potamogetonaceae, the pondweed family (formerly including Zannichelliaceae), is an Alismatales family of aquatic herbs in fresh and brackish waters worldwide, with 4-7 genera and about 90-95 species, type genus Potamogeton.

Potamos Deiradiotes

Potamos Deiradiotes (Ποτάμιοι Δειραδιῶται), an Attic deme of the tribe Leontis, probably in the river valley north of Thorikos; one of three Potamos demes, attested in prytany lists ca. 340–325 BC.

Potanina (Venusian crater)

Potanina is a roughly 90-94 km ringed impact crater on Venus at 31.6N, 53.1E, named in 1985 for Russian explorer Aleksandra Potanina, on Nyx Mons lava flows in Bell Regio with volcanic overprinting.

Potash

Potash, also called pearl ash, is the common name for water-soluble potassium salts mined as fertilizer, one of the three primary plant nutrients alongside nitrogen and phosphorus.

PotashCorp

PotashCorp, formally the Potash Corporation of Saskatchewan, was a Saskatoon-based fertilizer producer founded in 1975, privatized in 1989, and merged with Agrium in 2018 to form Nutrien.

Sep 19, 2026

Potasimto

Potasimto was an Egyptian army commander under Pharaoh Psamtik II, leading foreign mercenaries in the 593 BC campaign against Kush, known from the Abu Simbel graffiti.

Potassium

Potassium, symbol K, is a soft, silvery alkali metal isolated by Humphry Davy in 1807; about 94% of its chloride is used in fertilizer, and it is vital to human physiology.

Potassium alum

Potassium alum, also known as potash alum or potassium aluminum sulfate, is a double sulfate of potassium and aluminum that forms large octahedral crystals and purifies water.

Potassium amyl xanthate

Potassium amyl xanthate (PAX) is the potassium salt of O-pentyl dithiocarbonic acid, a strong, unselective froth flotation collector for copper, nickel, zinc, and gold sulfide ores.

Potassium bicarbonate

Potassium bicarbonate (KHCO₃), also called potassium hydrogen carbonate, is a white crystalline, slightly alkaline salt used as a food ingredient, antacid, fungicide for powdery mildew, and fire-extinguishing agent.

Potassium bisulfate

Potassium bisulfate (KHSO4, potassium hydrogen sulfate), an acid salt used as a pH control, leavening, and processing agent; GRAS Notice 60 (Jones-Hamilton, 2000) covered cake mixes at 0.1-1.0%. Distinct from potassium bisulfite.

Potassium bitartrate

Potassium bitartrate, also called cream of tartar or potassium hydrogen tartrate, is the potassium acid salt of tartaric acid, a byproduct of wine manufacture used in baking powder.

Potassium bromate

Potassium bromate (E 924) is the potassium salt of bromic acid, used as a dough conditioner in bread-making and classified by IARC as possibly carcinogenic.

Potassium bromide

Potassium bromide (KBr) is a white crystalline ionic salt, best known as the raw material for photographic silver bromide emulsions and as a long-standing antiseizure drug.

Potassium carbonate

Potassium carbonate (K2CO3), also known as salt of tartar or pearlash, is a white, hygroscopic inorganic salt that forms strongly alkaline solutions and has long been used in glassmaking and baking.

Potassium Channels

Potassium channels: tetrameric, potassium-selective membrane pores in four families (Kv, KCa, Kir, K2P) with a conserved TVGYG selectivity filter; they set resting potential, shape cardiac and neuronal action potentials, and underlie channelopathies.

Potassium chlorate

Potassium chlorate (KClO3), or chlorate of potash, is a white crystalline salt used as a strong oxidizing agent in matches, fireworks, explosives, and oxygen candles.

Potassium chloride

Potassium chloride (KCl), sold in agriculture as muriate of potash, is an ionic salt used as the dominant potassium fertilizer, a low-sodium table-salt substitute, and a medication for potassium deficiency.

Potassium chromate

Potassium chromate, also called dipotassium chromate, is a yellow, water-soluble inorganic salt of chromic acid used as a strong oxidizing agent and analytical reagent, notably as an indicator for chloride ions.

Potassium cyanide

Potassium cyanide (KCN) is a highly toxic white crystalline inorganic salt that releases hydrogen cyanide gas and is rapidly fatal, used in gold mining, electroplating, and fumigation.

Potassium dichromate

Potassium dichromate (K₂Cr₂O₇), also known as kali bichromicum, is an inorganic chromium salt forming orange-red crystals, used as a strong oxidizing agent and primary analytical standard, and restricted in the EU as carcinogenic.

Potassium ferricyanide

Potassium ferricyanide, also known as red prussiate, is a red crystalline salt with formula K3[Fe(CN)6], used in cyanotype blueprint photography, Prussian blue pigment, and electroplating.

Potassium ferrocyanide

Potassium ferrocyanide, also known as yellow prussiate of potash, is a lemon-yellow potassium salt used as the food additive E 536 and for making Prussian blue pigment.

Potassium fluoride

Potassium fluoride (KF) is an inorganic salt of potassium and fluoride, a white toxic powder used in insecticides, solder flux, and glass etching, and as a base catalyst in organic synthesis.

Potassium hydrogen phthalate

Potassium hydrogen phthalate, also known as potassium biphthalate or KHP, is the monopotassium salt of phthalic acid, used as a primary standard for acid–base titrations and pH calibration.

Potassium hydroxide

Potassium hydroxide, also known as caustic potash or potassium lye, is a strongly alkaline inorganic compound used to make soaps, fertilizers, potassium carbonate, and alkaline battery electrolytes.

Potassium iodide

Potassium iodide (KI), the potassium salt of iodide, is a stable-iodine thyroid blocking agent used in nuclear emergencies to block radioactive iodine uptake, plus table salt iodization and goiter treatment; not a general radiation antidote.

Oct 22, 2026

Potassium iron selenide

Potassium iron selenide (KxFe2−ySe2) is an iron-based superconductor formed by intercalating potassium between FeSe layers, discovered by the end of 2010 with a transition temperature above 30 K.

Potassium metal anode

A potassium metal anode is the metallic potassium negative electrode in potassium metal batteries, offering 687 mAh g⁻¹ capacity, a low potential of −2.93 V, and low cost.