Board Thread:General Discussion/@comment-9732657-20130519011726

http://bleach.wikia.com/wiki/White

In this article White is misrepresented as a mere Hollow when in the manga there is evidence supporting him being an unofficial Visored in its last stages of hollowfication.

First of all in chapter 533, page 12 Tousen confirmed that what White underwent was indeed Hollowfication. Further more in that same chapter, one page later Aizen confirms that White had been brought to life through the corpse of a shinigami.

Hollowfication is the process in which a Hollow soul is inserted into a host and the two merge to form a being of a higher order (chapter 535, page 10) through which the soul merges and forms a being that is stronger than the original two souls. However Hollowfication is unstable, for the process to initiate the barrier between the two souls has to be broken down and then the balance needs to be disrupted causing a chaotic development in the soul that leads to insanity and ultimately self destruction (aka. Soul Suicide). This leads me to the conclusion that White's involuntary self destruction was indeed Soul Suicide as it is supported by both Aizen and Urahara. 