Our glass wool is treated with dimethyldichlorosilane (DMCS) solution to render the wool inert for use in gas chromatography since DMCS wont decompose sensitive compounds. We use only the highest grade 8 microm borosilicate glass. Packaged in either 50 g bottlle or 454 g (1 lb.) zip style bag and boxed.Max Service Limint: 500°CSoftening Point: 686°CCAS Number:65997-17-3