2,2 - — Trihexylene glycol

U.S. Borax Research Corp., Anaheim, California, markets several borate esters under the trademark BORESTER. These include triethanolamine borate (BORESTER 20), tricresyl borate (m- and p-isomers) (BORESTER 8), and the biborate (4) (BORESTER 7). Whereas the chemical name for (4) is given in Table 1, it is commonly referred to as trihexylene glycol biborate [26545-48-2] and is prepared by the reaction of two moles of boric acid and three moles of hexylene glycol. 

Lastly, trihexylene glycol diborate should be mentioned. This organometallic compound of relatively low mammalian toxicity is soluble in organic solvents and thus represents a form in which boric acid (Section 6.2.1) can be transported. When, for example, it is applied to wood, penetration is followed by in-situ hydrolysis to boric acid, the wood thus being protected from fungi and insects. 

Trihexylene glycol biborate has been developed for the remedial preservative treatment of timber. After penetration in situ the hydrolysis to boric acid (Section 6.2.1) occurs providing fungicidal and insecticidal properties. For boric acid on Pinus sylvestris sapwood the following toxic limits have been established ... 

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