edgepedia

All articles A–Z

519,064 articles

Sodium

Sodium is a soft, silvery-white alkali metal with atomic number 11, isolated by Humphry Davy in 1807, that reacts vigorously with water and is vital for nerve signaling.

Sodium 5 nitroguaiacolate

Sodium 5-nitroguaiacolate (sodium 2-methoxy-5-nitrophenolate, CAS 67233-85-6) is a nitrophenolate plant growth regulator, EU-approved to 31 January 2027, used with o- and p-nitrophenolate isomers in products like Chaperone and Atonik.

Sodium acetate

Sodium acetate, also called sodium ethanoate, is the sodium salt of acetic acid, a white crystalline powder used in buffers, food, medicine, and reusable hand warmers.

Sodium aluminate

Sodium aluminate is an inorganic sodium–aluminum compound, written NaAlO2 in its anhydrous form and sold as hydrates and alkaline solutions, made from Bayer-process alumina for water treatment, papermaking, cement, and zeolites.

Sodium aluminium hydride

Sodium aluminum hydride, also called sodium alanate, is a complex metal hydride whose reversible hydrogen release after titanium doping made it widely studied for hydrogen storage.

Sodium amide

Sodium amide, also called sodamide (NaNH2), is an inorganic sodium salt used as a strong base in organic synthesis; it reacts violently with water and served industrially in indigo manufacture.

Sodium ammonia electride

A sodium ammonia electride is the deep blue solution formed when sodium dissolves in liquid ammonia, where free electrons act as anions; it founded electride chemistry.

Sodium arsenite

Sodium arsenite is the inorganic compound NaAsO₂, a white toxic powder that was the first commercial herbicide and is now used mainly as a laboratory reagent in arsenic research.

Sodium Ascorbate

Sodium ascorbate, the sodium salt of L-ascorbic acid, is a less acidic form of vitamin C used as a supplement, food antioxidant, and meat curing accelerator.

Sodium azide

Sodium azide (NaN3) is a toxic, colorless crystalline salt of hydrazoic acid, best known as the gas-generating propellant in automobile airbags and as a laboratory preservative.

Sodium benzoate

Sodium benzoate (E 211, NaC6H5CO2) is the sodium salt of benzoic acid, widely used as an antimicrobial preservative in acidic foods, soft drinks, and medicines.

Sodium beta-alumina

Sodium beta-alumina is a family of layered ceramics in which sodium ions move rapidly through conduction planes, serving as the solid electrolyte in sodium-sulfur and ZEBRA batteries.

Sodium bicarbonate

Sodium bicarbonate, commonly called baking soda (NaHCO3), is a white crystalline salt used as a leavening agent in baking, an antacid for heartburn, a household cleaner, and a fire suppressant.

Sodium bis(fluorosulfonyl)imide

Sodium bis(fluorosulfonyl)imide, abbreviated NaFSI, is the sodium analog of LiFSI, a conducting salt in sodium-ion and sodium-metal battery electrolytes prized for high solubility and ionic conductivity.

Sodium bismuth titanate

Sodium bismuth titanate (Na₀.₅Bi₀.₅TiO₃, abbreviated NBT or BNT) is a lead-free perovskite ferroelectric, first reported in the 1960s, now widely studied as a lead-free alternative to PZT in piezoelectric devices.

Sodium bisulfate

Sodium bisulfate, also called sodium hydrogen sulfate or sodium acid sulfate, is the monosodium salt of sulfuric acid used to lower pH in swimming pools and acidify food.

Sodium bisulfite

Sodium bisulfite, or sodium hydrogen sulfite (NaHSO3), is a white crystalline salt of sulfurous acid used as a food preservative, in pulp bleaching, and in photography.

Sodium borohydride

Sodium borohydride (NaBH₄), also called sodium tetrahydridoborate, is a white crystalline inorganic salt, first prepared in work published in 1953 and widely used as a mild chemoselective reducing agent.

Sodium bromide

Sodium bromide (NaBr) is a white crystalline salt, highly soluble in water, used in photography, drilling fluids, and water treatment, and as an antiepileptic drug for dogs and cats.

Sodium Butyrate

Sodium butyrate, also known as sodium butanoate, is the sodium salt of butyric acid, a short-chain fatty acid made in the colon and used as a laboratory HDAC inhibitor.

Sodium carbonate

Sodium carbonate (Na2CO3), also known as soda ash or washing soda, is an inorganic salt refined from trona or made synthetically, and is used mainly as a flux in glassmaking.

Sodium channel

Sodium channels are transmembrane proteins, chiefly voltage-gated (NaV1.1-1.9) plus epithelial ENaC, that conduct Na+ to drive action potentials; targets of local anesthetics, antiarrhythmics, tetrodotoxin, and the 2025 pain drug suzetrigine.

Sodium chlorate

Sodium chlorate is an inorganic sodium salt and strong oxidizing agent, produced by electrolysis of sodium chloride brine and used mainly to make chlorine dioxide for bleaching paper pulp.

Sodium chloride

Sodium chloride (NaCl) is common salt, an ionic compound of sodium and chloride ions that is the main salt in seawater and the mineral halite.

Sodium chloride deficiency

Sodium chloride deficiency (ICD-11 5B5K.5), salt deficiency from poor intake or losses via diuretics, cystic fibrosis sweat, or GI losses; rare in healthy people, presents as hypovolemic hyponatremia.

Sodium chloride subchlorides

Sodium chloride subchlorides are high-pressure sodium-rich compounds of sodium and chlorine, such as Na3Cl and Na2Cl, first predicted in 2013, overturning the view that NaCl alone is stable.

Sodium chlorides

Sodium chlorides are compounds of sodium and chlorine beyond ordinary table salt, such as NaCl₃ and Na₃Cl, predicted in 2013 and synthesized in diamond anvil cells at high pressure.

Sodium chlorite

Sodium chlorite (NaClO₂) is the sodium salt of chlorous acid, a white crystalline solid used almost entirely to generate chlorine dioxide for bleaching and disinfection.

Sodium chromate

Sodium chromate (Na2CrO4, CAS 7775-11-3), a hexavalent chromium salt used industrially as corrosion inhibitor, textile dyeing auxiliary, and wood preservative; its chromium-51 form is a radiopharmaceutical for red blood cell labeling, now largely retired.

Sodium cyanide

Sodium cyanide (NaCN) is the sodium salt of hydrocyanic acid, a white crystalline solid that is a rapidly fatal poison used to extract gold and silver from ores.