Diatomaceous earth is a transparent to gray,
odorless amorphous powder.
Diatomaceous earth is used as
a filtering agent and as a filler in construction materials,
pesticides, paints, and varnishes. The calcined version
(which has been heat treated) is the most dangerous and
contains crystallized silica, and should be handled as silica.
See also other entries on silica
This material is not singled out by DOT
in its
Performance-Oriented Packaging Standards.
High temperatures causes the formation
of crystalline silica. Incompatible with fluorine, oxygen
difluoride, chlorine difluoride.
