Dust Release (塵遁, Jinton, Viz: Particle Style) is a kekkei tōta, an advanced version of kekkei genkai. The jutsu are created by combining the earth, wind, and fire natures. This element allows the user to manipulate molecules, giving them the ability to pulverize anything into molecule-sized dust. The techniques of this nature initially form as a small three-dimensional object (e.g. a cube, a cone, etc.) composed of chakra that forms between the user's hands. When the technique is released, the form expands and surrounds the target. At this point, anything within the boundaries of the form is pulverized on the molecular level.
Only two shinobi in existence are capable of utilising this element: Mū and his student, Ōnoki.
Trivia
Like the Lava Release, the Dust Release has more than one user with no apparent blood-relation to each other.
It's possible that these techniques are not genetic, as Ōnoki stated that Mū passed the secrets of Dust Release on to him.
It is quite possible that only people with a certain Kekkai Genkai (maybe Lava Release) can expand their powers to a Dust Release Kekkei Tota. So Muu merely taught Onoki how to expand his Kekkei Genkai.