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Tetrabutyl ammonium hydroxide aqueous solution belongs to Quaternary ammonium hydroxide, which is an organic strong base mainly used as a phase transfer catalyst, molecular sieve template, adjusting agents in surfactant products and cleaning agents for the electronic industry. It has a special property---easy to form crystalline hydrate solid at low temperature.

Here below is the reference crystalline temperature for TBAH aqueous solution, and for different assay TBAH, crystalline temperature is different:

When temperature lower than mentioned above, TBAH solution will form crystalline hydrate solid in the liquid. But this will not affect the quality of material. After heating, the crystalline solid TBAH will be turn back to transparent liquid again.

We regularly supply this material with different purities, if you have any interests, please visit www.ahsuperchem.com or contact us directly.