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Disodium octaborate is a borate of sodium, a chemical compound of sodium, boron, and oxygen — a salt with elemental formula Na 2 B 8 O 13 or (Na +) 2 [B 8 O 13] 2−, also written as Na 2 O·4B 2 O 3. It is a colorless crystalline solid, soluble in water.
The structure of the repeating unit of the octaborate ion ([B 8 O 13] 2−) in the alpha form of disodium octaborate (α-Na 2 [B 8 O 13]). [5] This anion is cyclic and polymeric. It has a tetrahedral molecular geometry at the negatively charged boron atoms and a trigonal planar molecular geometry at the neutral boron atoms.
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.
One of the most common compounds used is disodium octaborate tetrahydrate Na 2 B 8 O 13 ·4H 2 O, commonly abbreviated DOT. Borate treated wood is of low toxicity to humans, and does not contain copper or other heavy metals.
Disodium enneaborate is the traditional name for a salt of sodium, boron, oxygen, and hydrogen, with elemental formula Na 2 B 9 H 22 O 20 or Na 2 B 9 O 9 ·11H 2 O. It is the sodium borate with the highest boron/sodium ratio.
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Trisodium borate is a chemical compound of sodium, boron, and oxygen, with formula Na 3 BO 3, or (Na +) 3 [BO 3] 3−. [3] 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.
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