Phenyl Arylene polymer virtually equivalent to a (5%-Phenyl)-methylpolysiloxane. Non-polar, very low bleed characteristics, ideal for GC/MS. Excellent inertness for active compounds. Improved signal-to-noise ratio for better sensitivity and mass spectral integrity. Bonded and cross-linked, solvent rinsable. MSD testing and certification available. Exact replacement of HP-5TA. Close equivalent to USP Phase G27.