π Summary
This notice of filing announces that a petition has been filed requesting that methylene diphenyl diisocyanate ((C<INF>8</INF>H<INF>6</INF>NO)(C<INF>8</INF>H<INF>5</INF>NO)<INF>n-2</INF> (C<INF>7</INF>H<INF>4</INF>NO); n=2.0-3.0), also known as "MDI," be added to the list of taxable substances. This notice of filing also requests comments on the petition. This notice of filing is not a determination that the list of taxable substances is modified.