NUNC Brand Thernanox, or TMX coverslips are made from a polymer (in the polyolefin family) that is highly resistant to most chemicals. Thermanox plastic is resistant to alcohols, aldehydes, hydrocarbons, dilute acids (<10%) and dilute alkalis (<2%). TMX has limited resistance to chlorinated hydro-carbons, however, it is not resistant to concentrated acids or bases.Thermanox plastic is a flexible, trans-parent polymer that can be sectioned using a microtome and is able to withstand high temp-eratures (temperature range –70 degree C to +150 degree C). Thermanox coverslips are culture treated on one side for enhanced cell attachment and growth. The treated side is packaged face up toward the label.