#sodium

• Ajmalină — An alkaloid extracted from the root of the tropical plant Rauwolfia serpentina, used in medicine as a class Ia antiarrhythmic agent; it acts by blocking sodium channels in myocardial cell membranes, thereby prolonging the heart's refractory period. It is primarily utilized for the electrocardiographic diagnosis of Brugada syndrome (the ajmaline challenge test) and in the emergency treatment of supraventricular tachycardias induced by Wolff-Parkinson-White syndrome.
• Alkali — A generic name given to the hydroxides of alkali metals (such as sodium, potassium) and alkaline earth metals, as well as ammonium hydroxide. In a traditional chemical sense, it refers to any water-soluble base capable of neutralizing acids, turning red litmus paper blue, and forming salts through combination reactions.
• Alkali cellulose — An intermediate product obtained in the chemical industry by treating cellulose with a concentrated solution of sodium hydroxide (caustic soda). This compound plays an essential structural role in the manufacture of viscose, rayon, and cellophane, facilitating the subsequent chemical reactivity of fibers by altering the macromolecular molecular arrangement.
• Aluminate — A salt of aluminic acid formed by the reaction of aluminum or its oxide with a strong base (e.g., sodium aluminate). As an adjective or past participle, it describes a substance or material that has been treated or structurally combined with aluminum (such as aluminate cement).
• Amide salt — An inorganic chemical compound derived from ammonia by replacing a hydrogen atom with a metal atom (usually an alkali or alkaline earth metal), containing the structural anion NH2-. Metallic amides, such as sodium amide (NaNH2), are recognized as extremely strong bases and severe nucleophilic reagents, widely used in industrial organic synthesis for deprotonation, alkylation, and the formation of new carbon-carbon bonds.
• Analcite — An older terminological or spelling variant contextually used for the mineral analcime (analcite), a hydrated sodium and aluminum silicate from the zeolite group. Structurally characterized by white, grey, or colorless isometric (icositetrahedral) crystals, this natural compound forms through hydrothermal processes in the cavities of basaltic magmatic rocks or as an authigenic mineral in some sedimentary rocks, studied in systematic mineralogy for its ion-exchange properties.
• Analcite — A mineral belonging to the silicate class (tectosilicates subclass), structurally considered a member of the zeolite or feldspathoid group, with the chemical formula NaAlSi2O6·H2O. It occurs as regular cubic or trapezohedral (icositetrahedral) crystals, colorless, white, or pink, with a vitreous luster, frequently found in basalt geodes, alkaline igneous rocks, and some saline lacustrine sedimentary deposits.
• Azide — A chemical compound, a salt of hydrazoic acid, or an organic derivative containing the structural functional group consisting of three linearly bound nitrogen atoms (N3-). Inorganic azides (such as sodium azide) are highly reactive ionic substances, used in airbag systems due to their ultra-fast decomposition releasing massive amounts of nitrogen gas, whereas organic azides are crucial pillars in fine chemical synthesis and biochemistry ('click chemistry' reactions).
• Nitrite — A salt of nitrous acid containing the stable NO2 functional group; in modern chemical and industrial nomenclature, it is known as a nitrite, widely used in the food industry as a preservative and color stabilizer for meat products, or in metallurgy as a corrosion inhibitor.