Standard particleboard (manufactured for interior applications) was treated with trimethylborate and modified trimethylborate and then left to hydrolyse for specified periods. The percentage residual trimethylborate was determined by placing samples in kerosene and analysing the kerosene for boron after 3 days of leaching. There was a significant correlation between the percentage hydrolysis of trimethylborate and the original trimethylborate concentration in the wood. The specific gravity of modified trimethylborate formulations also influenced the apparent rate of hydrolysis.

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