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Sodium tetrahydroxyborate is a salt (ionic compound) of with chemical formula Na H 4 B O 4 or Na + [B(OH) 4] −. It is one of several sodium borates . At room temperature it is a colorless crystalline solid.
In 1905, Burgess and Holt observed that fusing mixtures of boric oxide B 2 O 3 and sodium carbonate Na 2 CO 3 yielded on cooling two crystalline compounds with definite compositions, consistent with anhydrous borax Na 2 B 4 O 7 (which can be written Na 2 O·2B 2 O 3) and sodium octaborate Na 2 B 8 O 13 (which can be written Na 2 O·4B 2 O 3). [6]
Tetrahydroxyborate is an inorganic anion with the chemical formula [BH 4 O 4] − or [B(OH) 4] −. It contributes no colour to tetrahydroxyborate salts. It is found in the mineral hexahydroborite, Ca(B(OH) 4) 2 · 2 H 2 O, originally formulated CaB 2 O 4 · 6 H 2 O. [2] It is one of the boron oxoanions, and acts as a weak base.
Structure of the hydrated tetraborate (borax) ion, [B 4 O 5 (OH) 4] 2−. In chemistry, tetraborate or pyroborate is an anion (negative ion) with formula B 4 O 2− 7; or a salt containing that anion, such as sodium tetraborate, Na 2 B 4 O 7. It is one of the boron oxoacids, that is, a borate.
Sodium borate is a generic name for any salt of sodium with an anion consisting of boron and oxygen, and possibly hydrogen, or any hydrate thereof. It can be seen as a hydrated sodium salt of the appropriate boroxy acid , although the latter may not be a stable compound.
Sodium borohydride, also known as sodium tetrahydridoborate and sodium tetrahydroborate, [5] is an inorganic compound with the formula Na B H 4 (sometimes written as Na[BH 4]). It is a white crystalline solid, usually encountered as an aqueous basic solution. Sodium borohydride is a reducing agent that finds application in papermaking and dye ...
Borax (also referred to as sodium borate, tincal (/ ˈ t ɪ ŋ k əl /) and tincar (/ ˈ t ɪ ŋ k ər /)) is a salt (ionic compound), a hydrated or anhydrous borate of sodium, with the chemical formula Na 2 H 20 B 4 O 17. [1] [a] It is a colorless crystalline solid that dissolves in water to make a basic solution.
It is a sodium salt of the orthoboric acid B(OH) 3. The compound is also called trisodium orthoborate , sodium orthoborate , or just sodium borate . However, "sodium orthoborate" has been used also for a compound with formula Na 4 B 2 O 5 , which would correspond to an equimolar mixture of sodium metaborate NaBO 2 and trisodium borate proper.